Btrfs devel - Mar 2013 - WARNING: at fs/btrfs/extent_map.c:77 free_extent_map

Since the updates for linux-3.9 I''ve had three or four times a system
freeze and only a reset (Magic SysRq) helped. After the reboot I found
a bunch of this in syslog:

Mar 11 21:56:09 localhost kernel: ------------[ cut here ]------------
Mar 11 21:56:09 localhost kernel: WARNING: at fs/btrfs/extent_map.c:77
free_extent_map+0x64/0x76()
Mar 11 21:56:09 localhost kernel: Hardware name: EasyNote TK81
Mar 11 21:56:09 localhost kernel: Modules linked in: nfsv4 nfsd exportfs
auth_rpcgss nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_intel ath9k snd_hda_codec ath9k_common ath9k_hw
acer_wmi snd_hwdep snd_pcm ath sr_mod wmi broadcom snd_page_alloc snd_timer
cdrom tg3 k10temp snd acpi_cpufreq ohci_hcd soundcore i2c_piix4 mperf
Mar 11 21:56:09 localhost kernel: Pid: 11260, comm: bogofilter Tainted: G       
W    3.9.0-rc2 #293
Mar 11 21:56:09 localhost kernel: Call Trace:
Mar 11 21:56:09 localhost kernel: [<ffffffff8102abc2>] ?
warn_slowpath_common+0x76/0x8c
Mar 11 21:56:09 localhost kernel: [<ffffffff8115dcff>] ?
free_extent_map+0x64/0x76
Mar 11 21:56:09 localhost kernel: [<ffffffff8115bc57>] ?
btrfs_drop_extent_cache+0x363/0x39f
Mar 11 21:56:09 localhost kernel: [<ffffffff81152db4>] ?
__cow_file_range+0x175/0x3c1
Mar 11 21:56:09 localhost kernel: [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
Mar 11 21:56:09 localhost kernel: [<ffffffff8114d9f7>] ?
start_transaction+0x2d8/0x3e8
Mar 11 21:56:09 localhost kernel: [<ffffffff8115383e>] ?
cow_file_range+0xa9/0xc5
Mar 11 21:56:09 localhost kernel: [<ffffffff811538f7>] ?
run_delalloc_range+0x9d/0x33b
Mar 11 21:56:09 localhost kernel: [<ffffffff8116139b>] ?
free_extent_state+0x12/0x21
Mar 11 21:56:09 localhost kernel: [<ffffffff81163fa3>] ?
__extent_writepage+0x1a8/0x5d8
Mar 11 21:56:09 localhost kernel: [<ffffffff811635ae>] ?
end_extent_writepage+0x5d/0x5d
Mar 11 21:56:09 localhost kernel: [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
Mar 11 21:56:09 localhost kernel: [<ffffffff81164836>] ?
extent_writepages+0x49/0x60
Mar 11 21:56:09 localhost kernel: [<ffffffff81150146>] ?
btrfs_update_inode_item+0xde/0xde
Mar 11 21:56:09 localhost kernel: [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
Mar 11 21:56:09 localhost kernel: [<ffffffff8115a192>] ?
btrfs_sync_file+0x48/0x203
Mar 11 21:56:09 localhost kernel: [<ffffffff810c85ff>] ?
vfs_write+0xaf/0xf8
Mar 11 21:56:09 localhost kernel: [<ffffffff810e783b>] ?
do_fsync+0x2b/0x50
Mar 11 21:56:09 localhost kernel: [<ffffffff810e7a42>] ?
sys_fdatasync+0xb/0xf
Mar 11 21:56:09 localhost kernel: [<ffffffff814877d2>] ?
system_call_fastpath+0x16/0x1b
Mar 11 21:56:09 localhost kernel: ---[ end trace 3eaea449d8d56f92 ]---

As far as I remeber, it happend when fetching emails with claws. But
it''s not a reliable testcase. 

Another trace from the first time I found it in the logs. But here the
system didn''t hang:

Mar  4 14:28:35 localhost kernel: ------------[ cut here ]------------
Mar  4 14:28:35 localhost kernel: WARNING: at fs/btrfs/extent_map.c:77
free_extent_map+0x64/0x76()
Mar  4 14:28:35 localhost kernel: Hardware name: EasyNote TK81
Mar  4 14:28:35 localhost kernel: Modules linked in: nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_intel ath9k snd_hda_codec ath9k_common snd_hwdep snd_pcm broadcom
ath9k_hw snd_page_alloc ath sr_mod snd_timer acer_wmi snd cdrom wmi tg3 ohci_hcd
soundcore k10temp edac_core acpi_cpufreq i2c_piix4 mperf
Mar  4 14:28:35 localhost kernel: Pid: 1574, comm: flush-btrfs-1 Not tainted
3.9.0-rc1 #289
Mar  4 14:28:35 localhost kernel: Call Trace:
Mar  4 14:28:35 localhost kernel: [<ffffffff8102ab92>] ?
warn_slowpath_common+0x76/0x8c
Mar  4 14:28:35 localhost kernel: [<ffffffff8115dc7b>] ?
free_extent_map+0x64/0x76
Mar  4 14:28:35 localhost kernel: [<ffffffff8115bbd3>] ?
btrfs_drop_extent_cache+0x363/0x39f
Mar  4 14:28:35 localhost kernel: [<ffffffff81152d2d>] ?
__cow_file_range+0x175/0x3c1
Mar  4 14:28:36 localhost kernel: [<ffffffff81487830>] ?
_raw_spin_unlock+0x1c/0x28
Mar  4 14:28:36 localhost kernel: [<ffffffff81160de3>] ?
release_extent_buffer.isra.25+0x90/0x97
Mar  4 14:28:36 localhost kernel: [<ffffffff81153673>] ?
run_delalloc_nocow+0x6fa/0x795
Mar  4 14:28:36 localhost kernel: [<ffffffff81153837>] ?
run_delalloc_range+0x64/0x33b
Mar  4 14:28:36 localhost kernel: [<ffffffff81161317>] ?
free_extent_state+0x12/0x21
Mar  4 14:28:36 localhost kernel: [<ffffffff81163f1f>] ?
__extent_writepage+0x1a8/0x5d8
Mar  4 14:28:36 localhost kernel: [<ffffffff8116352a>] ?
end_extent_writepage+0x5d/0x5d
Mar  4 14:28:36 localhost kernel: [<ffffffff811d4b69>] ?
cpumask_any_but+0x25/0x34
Mar  4 14:28:36 localhost kernel: [<ffffffff810a5259>] ?
vma_interval_tree_subtree_search+0x33/0x55
Mar  4 14:28:36 localhost kernel: [<ffffffff810b07b8>] ?
page_mkclean+0x107/0x119
Mar  4 14:28:36 localhost kernel: [<ffffffff81164499>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
Mar  4 14:28:36 localhost kernel: [<ffffffff8114eae1>] ?
btrfs_submit_bio_hook+0x14f/0x14f
Mar  4 14:28:36 localhost kernel: [<ffffffff811647b2>] ?
extent_writepages+0x49/0x60
Mar  4 14:28:36 localhost kernel: [<ffffffff811500ca>] ?
btrfs_update_inode_item+0xde/0xde
Mar  4 14:28:36 localhost kernel: [<ffffffff81487830>] ?
_raw_spin_unlock+0x1c/0x28
Mar  4 14:28:36 localhost kernel: [<ffffffff810e3b86>] ?
__writeback_single_inode+0x37/0xd6
Mar  4 14:28:36 localhost kernel: [<ffffffff810e4810>] ?
writeback_sb_inodes+0x1b8/0x2d3
Mar  4 14:28:36 localhost kernel: [<ffffffff810e4994>] ?
__writeback_inodes_wb+0x69/0xab
Mar  4 14:28:36 localhost kernel: [<ffffffff810e4ad0>] ?
wb_writeback+0xfa/0x193
Mar  4 14:28:36 localhost kernel: [<ffffffff810345e3>] ?
lock_timer_base.isra.29+0x22/0x46
Mar  4 14:28:36 localhost kernel: [<ffffffff810e4da4>] ?
wb_do_writeback+0x10a/0x163
Mar  4 14:28:36 localhost kernel: [<ffffffff810344d2>] ?
__internal_add_timer+0xb5/0xb5
Mar  4 14:28:36 localhost kernel: [<ffffffff810e4e62>] ?
bdi_writeback_thread+0x65/0x116
Mar  4 14:28:36 localhost kernel: [<ffffffff810e4dfd>] ?
wb_do_writeback+0x163/0x163
Mar  4 14:28:36 localhost kernel: [<ffffffff810e4dfd>] ?
wb_do_writeback+0x163/0x163
Mar  4 14:28:36 localhost kernel: [<ffffffff81041293>] ? kthread+0x81/0x89
Mar  4 14:28:36 localhost kernel: [<ffffffff81040000>] ? get_pid+0x8/0xc
Mar  4 14:28:36 localhost kernel: [<ffffffff81041212>] ?
__kthread_parkme+0x5b/0x5b
Mar  4 14:28:36 localhost kernel: [<ffffffff814883ac>] ?
ret_from_fork+0x7c/0xb0
Mar  4 14:28:36 localhost kernel: [<ffffffff81041212>] ?
__kthread_parkme+0x5b/0x5b
Mar  4 14:28:36 localhost kernel: ---[ end trace be472b1297cf60cb ]---
Mar  4 14:28:36 localhost kernel: ------------[ cut here ]------------

regards,
  Johannes
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On Mon, Mar 11, 2013 at 10:34:04PM +0100, Johannes Hirte
wrote:
> Since the updates for linux-3.9 I''ve had three or four times a
system
> freeze and only a reset (Magic SysRq) helped. After the reboot I found
> a bunch of this in syslog:
> 
> Mar 11 21:56:09 localhost kernel: ------------[ cut here ]------------
> Mar 11 21:56:09 localhost kernel: WARNING: at fs/btrfs/extent_map.c:77
free_extent_map+0x64/0x76()
> Mar 11 21:56:09 localhost kernel: Hardware name: EasyNote TK81
> Mar 11 21:56:09 localhost kernel: Modules linked in: nfsv4 nfsd exportfs
auth_rpcgss nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_intel ath9k snd_hda_codec ath9k_common ath9k_hw
acer_wmi snd_hwdep snd_pcm ath sr_mod wmi broadcom snd_page_alloc snd_timer
cdrom tg3 k10temp snd acpi_cpufreq ohci_hcd soundcore i2c_piix4 mperf
> Mar 11 21:56:09 localhost kernel: Pid: 11260, comm: bogofilter Tainted: G  
W    3.9.0-rc2 #293
> Mar 11 21:56:09 localhost kernel: Call Trace:
> Mar 11 21:56:09 localhost kernel: [<ffffffff8102abc2>] ?
warn_slowpath_common+0x76/0x8c
> Mar 11 21:56:09 localhost kernel: [<ffffffff8115dcff>] ?
free_extent_map+0x64/0x76
> Mar 11 21:56:09 localhost kernel: [<ffffffff8115bc57>] ?
btrfs_drop_extent_cache+0x363/0x39f
> Mar 11 21:56:09 localhost kernel: [<ffffffff81152db4>] ?
__cow_file_range+0x175/0x3c1
> Mar 11 21:56:09 localhost kernel: [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> Mar 11 21:56:09 localhost kernel: [<ffffffff8114d9f7>] ?
start_transaction+0x2d8/0x3e8
> Mar 11 21:56:09 localhost kernel: [<ffffffff8115383e>] ?
cow_file_range+0xa9/0xc5
> Mar 11 21:56:09 localhost kernel: [<ffffffff811538f7>] ?
run_delalloc_range+0x9d/0x33b
> Mar 11 21:56:09 localhost kernel: [<ffffffff8116139b>] ?
free_extent_state+0x12/0x21
> Mar 11 21:56:09 localhost kernel: [<ffffffff81163fa3>] ?
__extent_writepage+0x1a8/0x5d8
> Mar 11 21:56:09 localhost kernel: [<ffffffff811635ae>] ?
end_extent_writepage+0x5d/0x5d
> Mar 11 21:56:09 localhost kernel: [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> Mar 11 21:56:09 localhost kernel: [<ffffffff81164836>] ?
extent_writepages+0x49/0x60
> Mar 11 21:56:09 localhost kernel: [<ffffffff81150146>] ?
btrfs_update_inode_item+0xde/0xde
> Mar 11 21:56:09 localhost kernel: [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> Mar 11 21:56:09 localhost kernel: [<ffffffff8115a192>] ?
btrfs_sync_file+0x48/0x203
> Mar 11 21:56:09 localhost kernel: [<ffffffff810c85ff>] ?
vfs_write+0xaf/0xf8
> Mar 11 21:56:09 localhost kernel: [<ffffffff810e783b>] ?
do_fsync+0x2b/0x50
> Mar 11 21:56:09 localhost kernel: [<ffffffff810e7a42>] ?
sys_fdatasync+0xb/0xf
> Mar 11 21:56:09 localhost kernel: [<ffffffff814877d2>] ?
system_call_fastpath+0x16/0x1b
> Mar 11 21:56:09 localhost kernel: ---[ end trace 3eaea449d8d56f92 ]---
> 
> As far as I remeber, it happend when fetching emails with claws. But
> it''s not a reliable testcase. 
Hi Johannes,

Could you please tell us what mount options you''re with?

thanks,
liubo
> 
> Another trace from the first time I found it in the logs. But here the
> system didn''t hang:
> 
> Mar  4 14:28:35 localhost kernel: ------------[ cut here ]------------
> Mar  4 14:28:35 localhost kernel: WARNING: at fs/btrfs/extent_map.c:77
free_extent_map+0x64/0x76()
> Mar  4 14:28:35 localhost kernel: Hardware name: EasyNote TK81
> Mar  4 14:28:35 localhost kernel: Modules linked in: nfsd exportfs
auth_rpcgss nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_intel ath9k snd_hda_codec ath9k_common snd_hwdep
snd_pcm broadcom ath9k_hw snd_page_alloc ath sr_mod snd_timer acer_wmi snd cdrom
wmi tg3 ohci_hcd soundcore k10temp edac_core acpi_cpufreq i2c_piix4 mperf
> Mar  4 14:28:35 localhost kernel: Pid: 1574, comm: flush-btrfs-1 Not
tainted 3.9.0-rc1 #289
> Mar  4 14:28:35 localhost kernel: Call Trace:
> Mar  4 14:28:35 localhost kernel: [<ffffffff8102ab92>] ?
warn_slowpath_common+0x76/0x8c
> Mar  4 14:28:35 localhost kernel: [<ffffffff8115dc7b>] ?
free_extent_map+0x64/0x76
> Mar  4 14:28:35 localhost kernel: [<ffffffff8115bbd3>] ?
btrfs_drop_extent_cache+0x363/0x39f
> Mar  4 14:28:35 localhost kernel: [<ffffffff81152d2d>] ?
__cow_file_range+0x175/0x3c1
> Mar  4 14:28:36 localhost kernel: [<ffffffff81487830>] ?
_raw_spin_unlock+0x1c/0x28
> Mar  4 14:28:36 localhost kernel: [<ffffffff81160de3>] ?
release_extent_buffer.isra.25+0x90/0x97
> Mar  4 14:28:36 localhost kernel: [<ffffffff81153673>] ?
run_delalloc_nocow+0x6fa/0x795
> Mar  4 14:28:36 localhost kernel: [<ffffffff81153837>] ?
run_delalloc_range+0x64/0x33b
> Mar  4 14:28:36 localhost kernel: [<ffffffff81161317>] ?
free_extent_state+0x12/0x21
> Mar  4 14:28:36 localhost kernel: [<ffffffff81163f1f>] ?
__extent_writepage+0x1a8/0x5d8
> Mar  4 14:28:36 localhost kernel: [<ffffffff8116352a>] ?
end_extent_writepage+0x5d/0x5d
> Mar  4 14:28:36 localhost kernel: [<ffffffff811d4b69>] ?
cpumask_any_but+0x25/0x34
> Mar  4 14:28:36 localhost kernel: [<ffffffff810a5259>] ?
vma_interval_tree_subtree_search+0x33/0x55
> Mar  4 14:28:36 localhost kernel: [<ffffffff810b07b8>] ?
page_mkclean+0x107/0x119
> Mar  4 14:28:36 localhost kernel: [<ffffffff81164499>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> Mar  4 14:28:36 localhost kernel: [<ffffffff8114eae1>] ?
btrfs_submit_bio_hook+0x14f/0x14f
> Mar  4 14:28:36 localhost kernel: [<ffffffff811647b2>] ?
extent_writepages+0x49/0x60
> Mar  4 14:28:36 localhost kernel: [<ffffffff811500ca>] ?
btrfs_update_inode_item+0xde/0xde
> Mar  4 14:28:36 localhost kernel: [<ffffffff81487830>] ?
_raw_spin_unlock+0x1c/0x28
> Mar  4 14:28:36 localhost kernel: [<ffffffff810e3b86>] ?
__writeback_single_inode+0x37/0xd6
> Mar  4 14:28:36 localhost kernel: [<ffffffff810e4810>] ?
writeback_sb_inodes+0x1b8/0x2d3
> Mar  4 14:28:36 localhost kernel: [<ffffffff810e4994>] ?
__writeback_inodes_wb+0x69/0xab
> Mar  4 14:28:36 localhost kernel: [<ffffffff810e4ad0>] ?
wb_writeback+0xfa/0x193
> Mar  4 14:28:36 localhost kernel: [<ffffffff810345e3>] ?
lock_timer_base.isra.29+0x22/0x46
> Mar  4 14:28:36 localhost kernel: [<ffffffff810e4da4>] ?
wb_do_writeback+0x10a/0x163
> Mar  4 14:28:36 localhost kernel: [<ffffffff810344d2>] ?
__internal_add_timer+0xb5/0xb5
> Mar  4 14:28:36 localhost kernel: [<ffffffff810e4e62>] ?
bdi_writeback_thread+0x65/0x116
> Mar  4 14:28:36 localhost kernel: [<ffffffff810e4dfd>] ?
wb_do_writeback+0x163/0x163
> Mar  4 14:28:36 localhost kernel: [<ffffffff810e4dfd>] ?
wb_do_writeback+0x163/0x163
> Mar  4 14:28:36 localhost kernel: [<ffffffff81041293>] ?
kthread+0x81/0x89
> Mar  4 14:28:36 localhost kernel: [<ffffffff81040000>] ?
get_pid+0x8/0xc
> Mar  4 14:28:36 localhost kernel: [<ffffffff81041212>] ?
__kthread_parkme+0x5b/0x5b
> Mar  4 14:28:36 localhost kernel: [<ffffffff814883ac>] ?
ret_from_fork+0x7c/0xb0
> Mar  4 14:28:36 localhost kernel: [<ffffffff81041212>] ?
__kthread_parkme+0x5b/0x5b
> Mar  4 14:28:36 localhost kernel: ---[ end trace be472b1297cf60cb ]---
> Mar  4 14:28:36 localhost kernel: ------------[ cut here ]------------
> 
> regards,
>   Johannes
> --
> To unsubscribe from this list: send the line "unsubscribe
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On Tue, 12 Mar 2013 09:39:35 +0800
Liu Bo <bo.li.liu@oracle.com> wrote:
> Hi Johannes,
> 
> Could you please tell us what mount options you''re with?
> 
> thanks,
> liubo
The Filesystem has six subvolumes, so mount options are:

noatime,inode_cache,autodefrag,subvolid=...

for each subvol.

I was able to reproduce it and getting a full backtrace
with netconsole:

------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15870, comm: bogofilter Not tainted 3.9.0-rc2-00112-g7c6baa3 #294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff8108ef08>] ? find_get_pages_contig+0x100/0x115
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacc5 ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15870, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff8108ef08>] ? find_get_pages_contig+0x100/0x115
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacc6 ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15887, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacc7 ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15887, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacc8 ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15887, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacc9 ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15887, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacca ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15887, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716baccb ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15887, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716baccc ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec---[ end trace a3b02a44716bacce ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15887, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716baccf ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15887, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8108eddd>] ? find_get_pages_tag+0xfa/0x125
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacdc ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacde ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff8108ef08>] ? find_get_pages_contig+0x100/0x115
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacdf ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 acer_wmi k10tempPid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
------------[ cut here ]------------
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Call Trace:
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacf5 ]---
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacf6 ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
---[ end trace a3b02a44716bacf7 ]---
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
---[ end trace a3b02a44716bacf9 ]---
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
---[ end trace a3b02a44716bacfa ]---
Hardware name: EasyNote TK81
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacfb ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff81164836>] ? extent_writepages+0x49/0x60
 [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
 [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
 [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
 [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacfd ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
 [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
 [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
 [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
 [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
 [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
 [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:76 free_extent_map+0x43/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcde>] ? free_extent_map+0x43/0x76
 [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
 [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
 [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
 [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
 [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bacff ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:74 free_extent_map+0x21/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcbc>] ? free_extent_map+0x21/0x76
 [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
 [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
 [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
 [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
 [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bad00 ]---
INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 1, t=60002
jiffies, g=144241, c=144240, q=6)
INFO: Stall ended before state dump start
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:76 free_extent_map+0x43/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcde>] ? free_extent_map+0x43/0x76
 [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
 [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
 [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
 [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
 [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bad01 ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:74 free_extent_map+0x21/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 1, t=240007
jiffies, g=144241, c=144240, q=6)
INFO: Stall ended before state dump start
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:76 free_extent_map+0x43/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
Pid: 15893, comm: bogofilter Tainted: G        W    3.9.0-rc2-00112-g7c6baa3
#294
Call Trace:
 [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
 [<ffffffff8115dcde>] ? free_extent_map+0x43/0x76
 [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
 [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
 [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
 [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
 [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
 [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
 [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
 [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
---[ end trace a3b02a44716bad03 ]---
------------[ cut here ]------------
WARNING: at fs/btrfs/extent_map.c:74 free_extent_map+0x21/0x76()
Hardware name: EasyNote TK81
Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl fuse
nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
SysRq : Emergency Sync
SysRq : Emergency Remount R/O
SysRq : Resetting
ACPI MEMORY or I/O RESET_REG.


regards,
  Johannes
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On Tue, Mar 12, 2013 at 10:32:09AM +0100, Johannes Hirte
wrote:
> On Tue, 12 Mar 2013 09:39:35 +0800
> Liu Bo <bo.li.liu@oracle.com> wrote:
> 
> > Hi Johannes,
> > 
> > Could you please tell us what mount options you''re with?
> > 
> > thanks,
> > liubo
> 
> The Filesystem has six subvolumes, so mount options are:
> 
> noatime,inode_cache,autodefrag,subvolid=...
> 
hmm, autodefrag + fsync.
> for each subvol.
> 
> I was able to reproduce it and getting a full backtrace
> with netconsole:
Does it reproduce reliable?  Maybe you can show me how to so that I can do it
on my box.

thanks,
liubo
> 
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15870, comm: bogofilter Not tainted 3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff8108ef08>] ? find_get_pages_contig+0x100/0x115
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacc5 ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15870, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff8108ef08>] ? find_get_pages_contig+0x100/0x115
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacc6 ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacc7 ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacc8 ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacc9 ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacca ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716baccb ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716baccc ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec---[ end trace a3b02a44716bacce ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716baccf ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8108eddd>] ? find_get_pages_tag+0xfa/0x125
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacdc ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacde ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff8108ef08>] ? find_get_pages_contig+0x100/0x115
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacdf ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  acer_wmi k10tempPid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ------------[ cut here ]------------
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Call Trace:
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacf5 ]---
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacf6 ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> ---[ end trace a3b02a44716bacf7 ]---
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> ---[ end trace a3b02a44716bacf9 ]---
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> ---[ end trace a3b02a44716bacfa ]---
> Hardware name: EasyNote TK81
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacfb ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
>  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
>  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
>  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
>  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacfd ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
>  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
>  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
>  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
>  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
>  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
>  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:76 free_extent_map+0x43/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcde>] ? free_extent_map+0x43/0x76
>  [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
>  [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
>  [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
>  [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
>  [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bacff ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:74 free_extent_map+0x21/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcbc>] ? free_extent_map+0x21/0x76
>  [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
>  [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
>  [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
>  [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
>  [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bad00 ]---
> INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 1, t=60002
jiffies, g=144241, c=144240, q=6)
> INFO: Stall ended before state dump start
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:76 free_extent_map+0x43/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcde>] ? free_extent_map+0x43/0x76
>  [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
>  [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
>  [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
>  [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
>  [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bad01 ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:74 free_extent_map+0x21/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 1,
t=240007 jiffies, g=144241, c=144240, q=6)
> INFO: Stall ended before state dump start
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:76 free_extent_map+0x43/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> Call Trace:
>  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
>  [<ffffffff8115dcde>] ? free_extent_map+0x43/0x76
>  [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
>  [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
>  [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
>  [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
>  [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
>  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
>  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
>  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> ---[ end trace a3b02a44716bad03 ]---
> ------------[ cut here ]------------
> WARNING: at fs/btrfs/extent_map.c:74 free_extent_map+0x21/0x76()
> Hardware name: EasyNote TK81
> Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss nfs_acl
fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod snd_hda_codec_realtek
acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf ath9k_common ath9k_hw ath
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom snd_page_alloc snd_timer snd
wmi soundcore i2c_piix4 ohci_hcd
> SysRq : Emergency Sync
> SysRq : Emergency Remount R/O
> SysRq : Resetting
> ACPI MEMORY or I/O RESET_REG.
> 
> 
> regards,
>   Johannes
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On Tue, Mar 12, 2013 at 05:41:13PM +0800, Liu Bo wrote:
> On Tue, Mar 12, 2013 at 10:32:09AM +0100, Johannes Hirte wrote:
> > On Tue, 12 Mar 2013 09:39:35 +0800
> > Liu Bo <bo.li.liu@oracle.com> wrote:
> > 
> > > Hi Johannes,
> > > 
> > > Could you please tell us what mount options you''re with?
> > > 
> > > thanks,
> > > liubo
> > 
> > The Filesystem has six subvolumes, so mount options are:
> > 
> > noatime,inode_cache,autodefrag,subvolid=...
> > 
> 
> hmm, autodefrag + fsync.
> 
> > for each subvol.
> > 
> > I was able to reproduce it and getting a full backtrace
> > with netconsole:
> 
> Does it reproduce reliable?  Maybe you can show me how to so that I can do
it
> on my box.
I get the same error message (followed by stuck CPU errors) with my repeat
rewrite tester program, with whatever the default mount options are:
http://djwong.org/docs/wac.c

# mkfs.btrfs /dev/sda

WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL
WARNING! - see http://btrfs.wiki.kernel.org before using

fs created label (null) on /dev/sda
	nodesize 4096 leafsize 4096 sectorsize 4096 size 300.00MB
Btrfs Btrfs v0.19
# mount /dev/sda /mnt
# ./wac -l 65536 -n32 -m32 -f -r /mnt/somefile

3.9.0-rc2 and a boring SATA SSD.

[10995.415429] ------------[ cut here ]------------
[10995.417259] WARNING: at
/storage/home/djwong/cdev/work/linux-mcsum/fs/btrfs/extent_map.c:77
free_extent_map+0x79/0x90 [btrfs]()
[10995.421335] Hardware name: 2349E51
[10995.422461] Modules linked in: btrfs scsi_debug nfsv4 sch_fq_codel eeprom
crc32_pclmul nfsd auth_rpcgss exportfs af_packet ata_piix raid6_pq xor
zlib_deflate libcrc32c [last unloaded: btrfs]
[10995.429721] Pid: 1787, comm: wac Not tainted 3.9.0-rc2-mcsum #1
[10995.431361] Call Trace:
[10995.432361]  [<ffffffff8105311f>] warn_slowpath_common+0x7f/0xc0
[10995.434143]  [<ffffffff8105317a>] warn_slowpath_null+0x1a/0x20
[10995.436285]  [<ffffffffa0092309>] free_extent_map+0x79/0x90 [btrfs]
[10995.438020]  [<ffffffffa008f92c>] btrfs_drop_extent_cache+0x3bc/0x470
[btrfs]
[10995.440074]  [<ffffffffa0084444>] __cow_file_range+0xf4/0x4a0 [btrfs]
[10995.441925]  [<ffffffffa007b64a>] ?
join_transaction.isra.30+0x11a/0x3b0 [btrfs]
[10995.444103]  [<ffffffffa009bd31>] ? free_extent_buffer+0x61/0xc0
[btrfs]
[10995.445372]  [<ffffffffa0084c1c>] run_delalloc_nocow+0x42c/0xad0
[btrfs]
[10995.446977]  [<ffffffffa0096b37>] ? free_extent_state+0x57/0x100
[btrfs]
[10995.448376]  [<ffffffffa008570c>] run_delalloc_range+0x36c/0x370
[btrfs]
[10995.449898]  [<ffffffffa009aa9d>] __extent_writepage+0x63d/0x7a0
[btrfs]
[10995.451460]  [<ffffffff81036f09>] ? flush_tlb_page+0x59/0xf0
[10995.452593]  [<ffffffff8113ca56>] ? __page_check_address+0xd6/0x170
[10995.453927]  [<ffffffffa009ae82>]
extent_write_cache_pages.isra.32.constprop.46+0x282/0x3e0 [btrfs]
[10995.455833]  [<ffffffffa009b22e>] extent_writepages+0x4e/0x70 [btrfs]
[10995.457077]  [<ffffffffa0081830>] ? can_nocow_odirect+0x2b0/0x2b0
[btrfs]
[10995.458397]  [<ffffffff810315ea>] ? __do_page_fault+0x22a/0x4d0
[10995.459528]  [<ffffffffa007eed8>] btrfs_writepages+0x28/0x30 [btrfs]
[10995.460759]  [<ffffffff81115b50>] do_writepages+0x20/0x40
[10995.461841]  [<ffffffff8110bc91>] __filemap_fdatawrite_range+0x51/0x60
[10995.463063]  [<ffffffff8110cb23>] filemap_fdatawrite_range+0x13/0x20
[10995.464280]  [<ffffffffa008d920>] btrfs_sync_file+0x60/0x2e0 [btrfs]
[10995.465631]  [<ffffffff8118f85b>] vfs_fsync+0x2b/0x40
[10995.467271]  [<ffffffff8113c593>] sys_msync+0x143/0x1d0
[10995.468367]  [<ffffffff8157ad5d>] system_call_fastpath+0x1a/0x1f
[10995.469563] ---[ end trace 627eca2f51036d33 ]---
[10995.474453] ------------[ cut here ]------------

--D
> 
> thanks,
> liubo
> 
> > 
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15870, comm: bogofilter Not tainted 3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff8108ef08>] ? find_get_pages_contig+0x100/0x115
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacc5 ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15870, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff8108ef08>] ? find_get_pages_contig+0x100/0x115
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacc6 ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacc7 ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacc8 ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacc9 ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacca ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716baccb ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716baccc ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec---[ end trace
a3b02a44716bacce ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716baccf ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8108eddd>] ? find_get_pages_tag+0xfa/0x125
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacdc ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacde ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff8108ef08>] ? find_get_pages_contig+0x100/0x115
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacdf ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  acer_wmi k10tempPid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ------------[ cut here ]------------
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Call Trace:
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacf5 ]---
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacf6 ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > ---[ end trace a3b02a44716bacf7 ]---
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > ---[ end trace a3b02a44716bacf9 ]---
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > ---[ end trace a3b02a44716bacfa ]---
> > Hardware name: EasyNote TK81
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacfb ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> >  [<ffffffff8108fc58>] ? __filemap_fdatawrite_range+0x4d/0x52
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacfd ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> >  [<ffffffff8114bb02>] ? join_transaction.isra.34+0x30f/0x31a
> >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:76 free_extent_map+0x43/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcde>] ? free_extent_map+0x43/0x76
> >  [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
> >  [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
> >  [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
> >  [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
> >  [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bacff ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:74 free_extent_map+0x21/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcbc>] ? free_extent_map+0x21/0x76
> >  [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
> >  [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
> >  [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
> >  [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
> >  [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bad00 ]---
> > INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 1,
t=60002 jiffies, g=144241, c=144240, q=6)
> > INFO: Stall ended before state dump start
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:76 free_extent_map+0x43/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcde>] ? free_extent_map+0x43/0x76
> >  [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
> >  [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
> >  [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
> >  [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
> >  [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bad01 ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:74 free_extent_map+0x21/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 1,
t=240007 jiffies, g=144241, c=144240, q=6)
> > INFO: Stall ended before state dump start
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:76 free_extent_map+0x43/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > Call Trace:
> >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> >  [<ffffffff8115dcde>] ? free_extent_map+0x43/0x76
> >  [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
> >  [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
> >  [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
> >  [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
> >  [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
> >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > ---[ end trace a3b02a44716bad03 ]---
> > ------------[ cut here ]------------
> > WARNING: at fs/btrfs/extent_map.c:74 free_extent_map+0x21/0x76()
> > Hardware name: EasyNote TK81
> > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > SysRq : Emergency Sync
> > SysRq : Emergency Remount R/O
> > SysRq : Resetting
> > ACPI MEMORY or I/O RESET_REG.
> > 
> > 
> > regards,
> >   Johannes
> --
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On Thu, Mar 14, 2013 at 02:59:51PM -0700, Darrick J. Wong
wrote:
> On Tue, Mar 12, 2013 at 05:41:13PM +0800, Liu Bo wrote:
> > On Tue, Mar 12, 2013 at 10:32:09AM +0100, Johannes Hirte wrote:
> > > On Tue, 12 Mar 2013 09:39:35 +0800
> > > Liu Bo <bo.li.liu@oracle.com> wrote:
> > > 
> > > > Hi Johannes,
> > > > 
> > > > Could you please tell us what mount options you''re
with?
> > > > 
> > > > thanks,
> > > > liubo
> > > 
> > > The Filesystem has six subvolumes, so mount options are:
> > > 
> > > noatime,inode_cache,autodefrag,subvolid=...
> > > 
> > 
> > hmm, autodefrag + fsync.
> > 
> > > for each subvol.
> > > 
> > > I was able to reproduce it and getting a full backtrace
> > > with netconsole:
> > 
> > Does it reproduce reliable?  Maybe you can show me how to so that I
can do it
> > on my box.
> 
> I get the same error message (followed by stuck CPU errors) with my repeat
> rewrite tester program, with whatever the default mount options are:
> http://djwong.org/docs/wac.c
> 
Great reproducer, thanks DJ.  I''ve figured out what goes wrong and am
testing my
patch, will send it out for you if it passes :)

thanks,
liubo
> # mkfs.btrfs /dev/sda
> 
> WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL
> WARNING! - see http://btrfs.wiki.kernel.org before using
> 
> fs created label (null) on /dev/sda
> 	nodesize 4096 leafsize 4096 sectorsize 4096 size 300.00MB
> Btrfs Btrfs v0.19
> # mount /dev/sda /mnt
> # ./wac -l 65536 -n32 -m32 -f -r /mnt/somefile
> 
> 3.9.0-rc2 and a boring SATA SSD.
> 
> [10995.415429] ------------[ cut here ]------------
> [10995.417259] WARNING: at
/storage/home/djwong/cdev/work/linux-mcsum/fs/btrfs/extent_map.c:77
free_extent_map+0x79/0x90 [btrfs]()
> [10995.421335] Hardware name: 2349E51
> [10995.422461] Modules linked in: btrfs scsi_debug nfsv4 sch_fq_codel
eeprom crc32_pclmul nfsd auth_rpcgss exportfs af_packet ata_piix raid6_pq xor
zlib_deflate libcrc32c [last unloaded: btrfs]
> [10995.429721] Pid: 1787, comm: wac Not tainted 3.9.0-rc2-mcsum #1
> [10995.431361] Call Trace:
> [10995.432361]  [<ffffffff8105311f>] warn_slowpath_common+0x7f/0xc0
> [10995.434143]  [<ffffffff8105317a>] warn_slowpath_null+0x1a/0x20
> [10995.436285]  [<ffffffffa0092309>] free_extent_map+0x79/0x90
[btrfs]
> [10995.438020]  [<ffffffffa008f92c>]
btrfs_drop_extent_cache+0x3bc/0x470 [btrfs]
> [10995.440074]  [<ffffffffa0084444>] __cow_file_range+0xf4/0x4a0
[btrfs]
> [10995.441925]  [<ffffffffa007b64a>] ?
join_transaction.isra.30+0x11a/0x3b0 [btrfs]
> [10995.444103]  [<ffffffffa009bd31>] ? free_extent_buffer+0x61/0xc0
[btrfs]
> [10995.445372]  [<ffffffffa0084c1c>] run_delalloc_nocow+0x42c/0xad0
[btrfs]
> [10995.446977]  [<ffffffffa0096b37>] ? free_extent_state+0x57/0x100
[btrfs]
> [10995.448376]  [<ffffffffa008570c>] run_delalloc_range+0x36c/0x370
[btrfs]
> [10995.449898]  [<ffffffffa009aa9d>] __extent_writepage+0x63d/0x7a0
[btrfs]
> [10995.451460]  [<ffffffff81036f09>] ? flush_tlb_page+0x59/0xf0
> [10995.452593]  [<ffffffff8113ca56>] ?
__page_check_address+0xd6/0x170
> [10995.453927]  [<ffffffffa009ae82>]
extent_write_cache_pages.isra.32.constprop.46+0x282/0x3e0 [btrfs]
> [10995.455833]  [<ffffffffa009b22e>] extent_writepages+0x4e/0x70
[btrfs]
> [10995.457077]  [<ffffffffa0081830>] ? can_nocow_odirect+0x2b0/0x2b0
[btrfs]
> [10995.458397]  [<ffffffff810315ea>] ? __do_page_fault+0x22a/0x4d0
> [10995.459528]  [<ffffffffa007eed8>] btrfs_writepages+0x28/0x30
[btrfs]
> [10995.460759]  [<ffffffff81115b50>] do_writepages+0x20/0x40
> [10995.461841]  [<ffffffff8110bc91>]
__filemap_fdatawrite_range+0x51/0x60
> [10995.463063]  [<ffffffff8110cb23>]
filemap_fdatawrite_range+0x13/0x20
> [10995.464280]  [<ffffffffa008d920>] btrfs_sync_file+0x60/0x2e0
[btrfs]
> [10995.465631]  [<ffffffff8118f85b>] vfs_fsync+0x2b/0x40
> [10995.467271]  [<ffffffff8113c593>] sys_msync+0x143/0x1d0
> [10995.468367]  [<ffffffff8157ad5d>] system_call_fastpath+0x1a/0x1f
> [10995.469563] ---[ end trace 627eca2f51036d33 ]---
> [10995.474453] ------------[ cut here ]------------
> 
> --D
> > 
> > thanks,
> > liubo
> > 
> > > 
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15870, comm: bogofilter Not tainted 3.9.0-rc2-00112-g7c6baa3
#294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff8108ef08>] ? find_get_pages_contig+0x100/0x115
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacc5 ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15870, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff8108ef08>] ? find_get_pages_contig+0x100/0x115
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacc6 ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacc7 ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacc8 ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacc9 ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacca ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716baccb ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716baccc ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec---[ end trace
a3b02a44716bacce ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716baccf ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15887, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8108eddd>] ? find_get_pages_tag+0xfa/0x125
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacdc ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacde ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff8108ef08>] ? find_get_pages_contig+0x100/0x115
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacdf ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  acer_wmi k10tempPid: 15893, comm: bogofilter Tainted: G        W
3.9.0-rc2-00112-g7c6baa3 #294
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ------------[ cut here ]------------
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Call Trace:
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacf5 ]---
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacf6 ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > > ---[ end trace a3b02a44716bacf7 ]---
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > > ---[ end trace a3b02a44716bacf9 ]---
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > > ---[ end trace a3b02a44716bacfa ]---
> > > Hardware name: EasyNote TK81
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81486bfa>] ? _raw_read_unlock+0x1e/0x2a
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacfb ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff8116139b>] ? free_extent_state+0x12/0x21
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff81164836>] ? extent_writepages+0x49/0x60
> > >  [<ffffffff8108fc58>] ?
__filemap_fdatawrite_range+0x4d/0x52
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8115bc57>] ? btrfs_drop_extent_cache+0x363/0x39f
> > >  [<ffffffff81152db4>] ? __cow_file_range+0x175/0x3c1
> > >  [<ffffffff8114d9f7>] ? start_transaction+0x2d8/0x3e8
> > >  [<ffffffff811538f7>] ? run_delalloc_range+0x9d/0x33b
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff8116451d>] ?
extent_write_cache_pages.isra.29.constprop.47+0x14a/0x255
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810c85ff>] ? vfs_write+0xaf/0xf8
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacfd ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:77 free_extent_map+0x64/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8115dcff>] ? free_extent_map+0x64/0x76
> > >  [<ffffffff8114bb02>] ?
join_transaction.isra.34+0x30f/0x31a
> > >  [<ffffffff8115383e>] ? cow_file_range+0xa9/0xc5
> > >  [<ffffffff81163fa3>] ? __extent_writepage+0x1a8/0x5d8
> > >  [<ffffffff811635ae>] ? end_extent_writepage+0x5d/0x5d
> > >  [<ffffffff81150146>] ? btrfs_update_inode_item+0xde/0xde
> > >  [<ffffffff8115a192>] ? btrfs_sync_file+0x48/0x203
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:76 free_extent_map+0x43/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcde>] ? free_extent_map+0x43/0x76
> > >  [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
> > >  [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
> > >  [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
> > >  [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
> > >  [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bacff ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:74 free_extent_map+0x21/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcbc>] ? free_extent_map+0x21/0x76
> > >  [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
> > >  [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
> > >  [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
> > >  [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
> > >  [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bad00 ]---
> > > INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by
1, t=60002 jiffies, g=144241, c=144240, q=6)
> > > INFO: Stall ended before state dump start
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:76 free_extent_map+0x43/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcde>] ? free_extent_map+0x43/0x76
> > >  [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
> > >  [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
> > >  [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
> > >  [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
> > >  [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bad01 ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:74 free_extent_map+0x21/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by
1, t=240007 jiffies, g=144241, c=144240, q=6)
> > > INFO: Stall ended before state dump start
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:76 free_extent_map+0x43/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > Pid: 15893, comm: bogofilter Tainted: G        W   
3.9.0-rc2-00112-g7c6baa3 #294
> > > Call Trace:
> > >  [<ffffffff8102abc2>] ? warn_slowpath_common+0x76/0x8c
> > >  [<ffffffff8115dcde>] ? free_extent_map+0x43/0x76
> > >  [<ffffffff81179f6a>] ? btrfs_log_inode+0x5d9/0x72e
> > >  [<ffffffff8114eabc>] ? btrfs_submit_bio_hook+0xae/0x14f
> > >  [<ffffffff8117afc0>] ? btrfs_log_inode_parent+0x1cf/0x2ea
> > >  [<ffffffff8117b110>] ? btrfs_log_dentry_safe+0x35/0x4e
> > >  [<ffffffff8115a2a5>] ? btrfs_sync_file+0x15b/0x203
> > >  [<ffffffff810e783b>] ? do_fsync+0x2b/0x50
> > >  [<ffffffff810e7a42>] ? sys_fdatasync+0xb/0xf
> > >  [<ffffffff814877d2>] ? system_call_fastpath+0x16/0x1b
> > > ---[ end trace a3b02a44716bad03 ]---
> > > ------------[ cut here ]------------
> > > WARNING: at fs/btrfs/extent_map.c:74 free_extent_map+0x21/0x76()
> > > Hardware name: EasyNote TK81
> > > Modules linked in: netconsole configfs nfsd exportfs auth_rpcgss
nfs_acl fuse nfs lockd sunrpc snd_hda_codec_hdmi ath9k sr_mod
snd_hda_codec_realtek acpi_cpufreq broadcom tg3 acer_wmi k10temp mperf
ath9k_common ath9k_hw ath snd_hda_intel snd_hda_codec snd_hwdep snd_pcm cdrom
snd_page_alloc snd_timer snd wmi soundcore i2c_piix4 ohci_hcd
> > > SysRq : Emergency Sync
> > > SysRq : Emergency Remount R/O
> > > SysRq : Resetting
> > > ACPI MEMORY or I/O RESET_REG.
> > > 
> > > 
> > > regards,
> > >   Johannes
> > --
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