thr3ads.net - Btrfs devel - kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing [Sep 2013]

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Guenther Starnberger

2013-Sep-25 06:56 UTC

kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing

On one of my btrfs filesystems I''m encountering a reproducable kernel
bug
during rebalancing. This issue originally appeared on Linux 3.11.1, but I am
also able to reproduce it in a VM using btrfs-next (c024ca6) and Linux
3.12-rc2 (4a10c2a).

I did the following operations (in chronological order) on the filesystem
before this issue appeared, so they might be responsible for putting the
filesystem into a bad state. However, according to fsck the filesystem looks
fine.

- Regular deduplications with bedup.

- Mounting the previously uncompressed filesystem with the lzo compression
  option and then using defrag to defrag (and compress) each file.

- Running out of diskspace during a bedup run with size cutoff 0, although the
  actual disk usage should be less than 50%. Based on the suggestions in the
  FAQ (http://goo.gl/qCgZR) I decided to try rebalancing the filesystem.

- Rebalance the filesystem (btrfs fi balance /mountpoint -dusage=5) which lead
  to the kernel bug. Subsequent rebalancing runs after reboots and with
  different kernel versions exhibit the same problem.

Log output:

4,694,2141772062,-;------------[ cut here ]------------
2,695,2141773153,-;kernel BUG at fs/btrfs/relocation.c:1060!
4,696,2141774227,-;invalid opcode: 0000 [#1] PREEMPT SMP 
4,697,2141775124,-;Modules linked in: btrfs raid6_pq crc32c libcrc32c
zlib_deflate xor xts gf128mul dm_crypt dm_mod usb_storage snd_intel8x0
snd_ac97_codec pcspkr psmouse i2c_piix4 i2c_core ppdev ac97_bus e1000 snd_pcm
snd_page_alloc microcode snd_timer intel_agp joydev evdev parport_pc snd
serio_raw intel_gtt ac parport soundcore battery button mperf processor ext4
crc16 mbcache jbd2 sr_mod cdrom sd_mod ata_generic pata_acpi hid_generic usbhid
hid ata_piix ahci libahci ohci_pci ohci_hcd ehci_pci ehci_hcd usbcore usb_common
libata scsi_mod
4,698,2141775124,-;CPU: 0 PID: 480 Comm: btrfs-balance Not tainted
3.11.0-1-90676-gc024ca6-dirty #1
4,699,2141775124,-;Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS
VirtualBox 12/01/2006
4,700,2141775124,-;task: ffff88007c2d3b10 ti: ffff880068d44000 task.ti:
ffff880068d44000
4,701,2141775124,-;RIP: 0010:[<ffffffffa04f5d3a>] 
[<ffffffffa04f5d3a>] build_backref_tree+0x112a/0x11d0 [btrfs]
4,702,2141775124,-;RSP: 0018:ffff880068d45ab8  EFLAGS: 00010246
4,703,2141775124,-;RAX: 0000000000000000 RBX: ffff88007c2ef800 RCX:
ffff88004db48dd0
4,704,2141775124,-;RDX: ffff880068d45b30 RSI: ffff88007c2ef820 RDI:
ffff88004db48dc0
4,705,2141775124,-;RBP: ffff880068d45ba0 R08: ffff88004dae7a80 R09:
ffff880068d45a70
4,706,2141775124,-;R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000000
4,707,2141775124,-;R13: ffff8800787e3900 R14: ffff88004dae7200 R15:
ffff88004db48dd0
4,708,2141775124,-;FS:  0000000000000000(0000) GS:ffff88007fa00000(0000)
knlGS:0000000000000000
4,709,2141775124,-;CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
4,710,2141775124,-;CR2: 00007ffa7bbd9408 CR3: 00000000764a4000 CR4:
00000000000006f0
4,711,2141775124,-;Stack:
4,712,2141775124,-; ffff88004dae7480 0000000000000000 ffff88004db48560
ffff88004dae7a80
4,713,2141775124,-; ffff88004dae7a80 ffff8800787e3900 ffff88007c2ee800
ffff8800787e3120
4,714,2141775124,-; ffff88004dae76c0 ffff88007c2ef920 ffff88004dae7480
ffff88007c2ef924
4,715,2141775124,-;Call Trace:
4,716,2141775124,-; [<ffffffffa04f7228>] relocate_tree_blocks+0x1d8/0x630
[btrfs]
4,717,2141775124,-; [<ffffffffa04f8730>] relocate_block_group+0x280/0x690
[btrfs]
4,718,2141775124,-; [<ffffffffa04f8cdd>]
btrfs_relocate_block_group+0x19d/0x2e0 [btrfs]
4,719,2141775124,-; [<ffffffffa04d0938>]
btrfs_relocate_chunk.isra.27+0x68/0x780 [btrfs]
4,720,2141775124,-; [<ffffffffa0489d88>] ? btrfs_search_slot+0x498/0x970
[btrfs]
4,721,2141775124,-; [<ffffffffa04c5fb9>] ? release_extent_buffer+0xa9/0xd0
[btrfs]
4,722,2141775124,-; [<ffffffffa04cbbcf>] ? free_extent_buffer+0x4f/0xa0
[btrfs]
4,723,2141775124,-; [<ffffffffa04d3ee3>] btrfs_balance+0x913/0xeb0 [btrfs]
4,724,2141775124,-; [<ffffffffa04d44f0>] balance_kthread+0x70/0x80 [btrfs]
4,725,2141775124,-; [<ffffffffa04d4480>] ? btrfs_balance+0xeb0/0xeb0
[btrfs]
4,726,2141775124,-; [<ffffffff81083680>] kthread+0xc0/0xd0
4,727,2141775124,-; [<ffffffff810835c0>] ?
kthread_create_on_node+0x120/0x120
4,728,2141775124,-; [<ffffffff814ddf2c>] ret_from_fork+0x7c/0xb0
4,729,2141775124,-; [<ffffffff810835c0>] ?
kthread_create_on_node+0x120/0x120
4,730,2141775124,-;Code: 4c 89 ef e8 b9 f1 f8 ff 48 8b bd 50 ff ff ff e8 ad f1
f8 ff 48 83 bd 30 ff ff ff 00 0f 85 0c fd ff ff 31 c0 e9 ae ef ff ff 0f 0b
<0f> 0b 48 8b 85 30 ff ff ff 49 8d 7e 20 48 8b 70 18 48 89 c2 e8
1,731,2141775124,-;RIP  [<ffffffffa04f5d3a>]
build_backref_tree+0x112a/0x11d0 [btrfs]
4,732,2141775124,-; RSP <ffff880068d45ab8>
4,733,2141819898,-;---[ end trace fa708b06a85e0e77 ]---

This issue looks very similar to
https://bugzilla.novell.com/show_bug.cgi?id=839952 but the cause for the issue
in the bug tracker should have been fixed in b6c60c8 which seems to be part of
the btrfs-next tree. I can still reproduce the problem on btrfs-next, so
it''s
either a different issue, or not fully fixed yet.

- Guenther
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David Sterba

2013-Sep-25 14:46 UTC

head link

Re: kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing

On Wed, Sep 25, 2013 at 08:56:47AM +0200, Guenther Starnberger
wrote:> On one of my btrfs filesystems I''m encountering a reproducable
kernel bug
> during rebalancing. This issue originally appeared on Linux 3.11.1, but I
am
> also able to reproduce it in a VM using btrfs-next (c024ca6) and Linux
> 3.12-rc2 (4a10c2a).
3.12-rc really? I''d like to see the stacktrace then.
> kernel BUG at fs/btrfs/relocation.c:1060!
> RIP: 0010:[<ffffffffa04f5d3a>]  [<ffffffffa04f5d3a>]
build_backref_tree+0x112a/0x11d0 [btrfs]
This matches the known bug in 3.11, fix was submitted to 3.11.x stable.


thanks,
david
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Guenther Starnberger

2013-Sep-26 05:26 UTC

head link

Re: kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing

On Wed, Sep 25, 2013 at 04:46:41PM +0200, David Sterba wrote:
> 3.12-rc really? I''d like to see the stacktrace then.
Yes - this also happens on 3.12-rc kernels. Here''s the stacktrace for
4b97280
(which is several commits ahead of 3.12-rc2):

[  126.735598] btrfs: disk space caching is enabled
[  126.737038] btrfs: has skinny extents
[  144.769929] BTRFS debug (device dm-0): unlinked 1 orphans
[  144.836240] btrfs: continuing balance
[  153.441134] btrfs: relocating block group 1542996361216 flags 1
[  295.780293] btrfs: found 18 extents
[  310.107200] ------------[ cut here ]------------
[  310.108496] kernel BUG at fs/btrfs/relocation.c:1060!
[  310.109709] invalid opcode: 0000 [#1] PREEMPT SMP 
[  310.110268] Modules linked in: btrfs raid6_pq crc32c libcrc32c xor xts
gf128mul dm_crypt dm_mod usb_storage psmouse ppdev e1000 evdev pcspkr serio_raw
joydev microcode snd_intel8x0 snd_ac97_codec i2c_piix4 i2c_core ac97_bus snd_pcm
snd_page_alloc snd_timer parport_pc parport snd soundcore intel_agp button
battery processor ac intel_gtt ext4 crc16 mbcache jbd2 hid_generic usbhid hid
sr_mod cdrom sd_mod ata_generic pata_acpi ohci_pci ata_piix ahci libahci
ohci_hcd ehci_pci ehci_hcd usbcore usb_common libata scsi_mod
[  310.110268] CPU: 0 PID: 366 Comm: btrfs-balance Not tainted
3.12.0-1-00083-g4b97280-dirty #1
[  310.110268] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS
VirtualBox 12/01/2006
[  310.110268] task: ffff880078b00000 ti: ffff880078afe000 task.ti:
ffff880078afe000
[  310.110268] RIP: 0010:[<ffffffffa04f6e8a>]  [<ffffffffa04f6e8a>]
build_backref_tree+0x112a/0x11d0 [btrfs]
[  310.110268] RSP: 0018:ffff880078affab8  EFLAGS: 00010246
[  310.110268] RAX: 0000000000000000 RBX: ffff8800784d4000 RCX: ffff88006a2a9d90
[  310.110268] RDX: ffff880078affb30 RSI: ffff8800784d4020 RDI: ffff88006a2a9d80
[  310.110268] RBP: ffff880078affba0 R08: ffff880077d07e00 R09: ffff880078affa70
[  310.110268] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[  310.110268] R13: ffff880078c95d80 R14: ffff880077d07c80 R15: ffff88006a2a9d90
[  310.110268] FS:  0000000000000000(0000) GS:ffff88007fa00000(0000)
knlGS:0000000000000000
[  310.110268] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  310.110268] CR2: 00007f51ca3af010 CR3: 000000007bf8d000 CR4: 00000000000006f0
[  310.110268] Stack:
[  310.110268]  ffff880077d07d00 0000000000000000 ffff88006a2a9320
ffff880077d07e00
[  310.110268]  ffff880077d07e00 ffff880078c95d80 ffff88007ad99000
ffff880078c95120
[  310.110268]  ffff880077d07bc0 ffff8800784d4120 ffff880077d07d00
ffff8800784d4124
[  310.110268] Call Trace:
[  310.110268]  [<ffffffffa04f8378>] relocate_tree_blocks+0x1d8/0x630
[btrfs]
[  310.110268]  [<ffffffffa04f9880>] relocate_block_group+0x280/0x690
[btrfs]
[  310.110268]  [<ffffffffa04f9e2d>]
btrfs_relocate_block_group+0x19d/0x2e0 [btrfs]
[  310.110268]  [<ffffffffa04d1a88>]
btrfs_relocate_chunk.isra.28+0x68/0x780 [btrfs]
[  310.110268]  [<ffffffffa048af08>] ? btrfs_search_slot+0x498/0x970
[btrfs]
[  310.110268]  [<ffffffffa04c73d9>] ? release_extent_buffer+0xa9/0xd0
[btrfs]
[  310.110268]  [<ffffffffa04ccd1f>] ? free_extent_buffer+0x4f/0xa0
[btrfs]
[  310.110268]  [<ffffffffa04d5033>] btrfs_balance+0x913/0xeb0 [btrfs]
[  310.110268]  [<ffffffffa04d5640>] balance_kthread+0x70/0x80 [btrfs]
[  310.110268]  [<ffffffffa04d55d0>] ? btrfs_balance+0xeb0/0xeb0 [btrfs]
[  310.110268]  [<ffffffff81083b70>] kthread+0xc0/0xd0
[  310.110268]  [<ffffffff81083ab0>] ? kthread_create_on_node+0x120/0x120
[  310.110268]  [<ffffffff814ef37c>] ret_from_fork+0x7c/0xb0
[  310.110268]  [<ffffffff81083ab0>] ? kthread_create_on_node+0x120/0x120
[  310.110268] Code: 4c 89 ef e8 e9 f1 f8 ff 48 8b bd 50 ff ff ff e8 dd f1 f8 ff
48 83 bd 30 ff ff ff 00 0f 85 0c fd ff ff 31 c0 e9 ae ef ff ff 0f 0b <0f>
0b 48 8b 85 30 ff ff ff 49 8d 7e 20 48 8b 70 18 48 89 c2 e8
[  310.110268] RIP  [<ffffffffa04f6e8a>] build_backref_tree+0x112a/0x11d0
[btrfs]
[  310.110268]  RSP <ffff880078affab8>
[  310.160477] ---[ end trace 1caf0f84ada634a2 ]---
> > kernel BUG at fs/btrfs/relocation.c:1060!
> > RIP: 0010:[<ffffffffa04f5d3a>]  [<ffffffffa04f5d3a>]
build_backref_tree+0x112a/0x11d0 [btrfs]
> 
> This matches the known bug in 3.11, fix was submitted to 3.11.x stable.
The kernel under which I''ve first noticed this issue was 3.11.1. Should
this
version already contain the fix?

- Guenther
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cwillu

2013-Oct-06 08:53 UTC

head link

Re: kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing

Another user has just reported this in irc on 3.11.2

kernel BUG at fs/btrfs/relocation.c:1055!
invalid opcode: 0000 [#1] SMP
Modules linked in: ebtable_nat nf_conntrack_netbios_ns
nf_conntrack_broadcast ipt_MASQUERADE ip6table_nat nf_nat_ipv6
ip6table_mangle ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6
iptable_nat nf_nat_ipv4 nf_nat iptable_mangle nf_conntrack_ipv4
nf_defrag_ipv4 xt_conntrack nf_conntrack ebtable_filter ebtables bnep
ip6table_filter ip6_tables arc4 x86_pkg_temp_thermal coretemp
kvm_intel ath9k_htc joydev ath9k_common ath9k_hw ath kvm
snd_hda_codec_hdmi mac80211 cfg80211 iTCO_wdt iTCO_vendor_support
ath3k r8169 btusb snd_hda_codec_realtek snd_hda_intel mii
snd_hda_codec snd_hwdep serio_raw snd_seq snd_seq_device mxm_wmi
snd_pcm bluetooth mei_me microcode i2c_i801 rfkill shpchp lpc_ich
mfd_core mei wmi mperf snd_page_alloc snd_timer snd soundcore uinput
btrfs libcrc32c xor zlib_deflate raid6_pq dm_crypt hid_logitech_dj
i915 crc32_pclmul crc32c_intel ghash_clmulni_intel i2c_algo_bit
drm_kms_helper drm i2c_core video
CPU: 1 PID: 564 Comm: btrfs-balance Not tainted 3.11.2-201.fc19.x86_64 #1
Hardware name: ECS Z77H2-AX/Z77H2-AX, BIOS 4.6.5 10/25/2012
task: ffff8807ee1c1e80 ti: ffff8807f1cc8000 task.ti: ffff8807f1cc8000
RIP: 0010:[<ffffffffa01f8007>]  [<ffffffffa01f8007>]
build_backref_tree+0x1077/0x1130 [btrfs]
RSP: 0018:ffff8807f1cc9ab8  EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8807eef77480 RCX: dead000000200200
RDX: ffff8807f1cc9b28 RSI: ffff8807f1cc9b28 RDI: ffff8807ef5896d0
RBP: ffff8807f1cc9b98 R08: ffff8807ef5896d0 R09: 0000000000000001
R10: ffffffffa01f5483 R11: 0000000000000000 R12: ffff8807ef5896d0
R13: ffff8807ef5896c0 R14: ffff8807f22ee360 R15: ffff8807f0e62000
FS:  0000000000000000(0000) GS:ffff88081f240000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d97749a90 CR3: 00000007e38ef000 CR4: 00000000001407e0
Stack:
 ffff8807f0e62580 ffff8807eef77a80 ffff8807ef5899e0 ffff8807eef77780
 ffff8807ea5ab000 ffff8807f22ee360 ffff8807eef777c0 ffff8807f22ee000
 ffff8807f0e62120 ffff8807eef77a80 ffff8807f0e62020 0000000000000000
Call Trace:
 [<ffffffffa01f8478>] relocate_tree_blocks+0x1d8/0x630 [btrfs]
 [<ffffffffa01f9108>] ? add_data_references+0x248/0x280 [btrfs]
 [<ffffffffa01f9d10>] relocate_block_group+0x280/0x690 [btrfs]
 [<ffffffffa01fa2bf>] btrfs_relocate_block_group+0x19f/0x2e0 [btrfs]
 [<ffffffffa01d1bff>] btrfs_relocate_chunk.isra.32+0x6f/0x740 [btrfs]
 [<ffffffffa0188a79>] ? btrfs_set_path_blocking+0x39/0x80 [btrfs]
 [<ffffffffa018d892>] ? btrfs_search_slot+0x382/0x940 [btrfs]
 [<ffffffffa01ce15f>] ? free_extent_buffer+0x4f/0xa0 [btrfs]
 [<ffffffffa01d67e7>] btrfs_balance+0x8e7/0xe80 [btrfs]
 [<ffffffffa01d6df0>] balance_kthread+0x70/0x80 [btrfs]
 [<ffffffffa01d6d80>] ? btrfs_balance+0xe80/0xe80 [btrfs]
 [<ffffffff81088640>] kthread+0xc0/0xd0
 [<ffffffff81088580>] ? insert_kthread_work+0x40/0x40
 [<ffffffff8165686c>] ret_from_fork+0x7c/0xb0
 [<ffffffff81088580>] ? insert_kthread_work+0x40/0x40
Code: 4c 89 f7 e8 0c 0c f9 ff 48 8b bd 58 ff ff ff e8 00 0c f9 ff 48
83 bd 38 ff ff ff 00 0f 85 1e fe ff ff 31 c0 e9 5d f0 ff ff 0f 0b <0f>
0b 48 8b 73 18 48 89 c7 e8 49 f3 01 00 48 8b 85 38 ff ff ff
RIP  [<ffffffffa01f8007>] build_backref_tree+0x1077/0x1130 [btrfs]
 RSP <ffff8807f1cc9ab8>

On Wed, Sep 25, 2013 at 11:26 PM, Guenther Starnberger
<linux-btrfs@gst.priv.at> wrote:> On Wed, Sep 25, 2013 at 04:46:41PM +0200, David Sterba wrote:
>
>> 3.12-rc really? I''d like to see the stacktrace then.
>
> Yes - this also happens on 3.12-rc kernels. Here''s the stacktrace
for 4b97280
> (which is several commits ahead of 3.12-rc2):
>
> [  126.735598] btrfs: disk space caching is enabled
> [  126.737038] btrfs: has skinny extents
> [  144.769929] BTRFS debug (device dm-0): unlinked 1 orphans
> [  144.836240] btrfs: continuing balance
> [  153.441134] btrfs: relocating block group 1542996361216 flags 1
> [  295.780293] btrfs: found 18 extents
> [  310.107200] ------------[ cut here ]------------
> [  310.108496] kernel BUG at fs/btrfs/relocation.c:1060!
> [  310.109709] invalid opcode: 0000 [#1] PREEMPT SMP
> [  310.110268] Modules linked in: btrfs raid6_pq crc32c libcrc32c xor xts
gf128mul dm_crypt dm_mod usb_storage psmouse ppdev e1000 evdev pcspkr serio_raw
joydev microcode snd_intel8x0 snd_ac97_codec i2c_piix4 i2c_core ac97_bus snd_pcm
snd_page_alloc snd_timer parport_pc parport snd soundcore intel_agp button
battery processor ac intel_gtt ext4 crc16 mbcache jbd2 hid_generic usbhid hid
sr_mod cdrom sd_mod ata_generic pata_acpi ohci_pci ata_piix ahci libahci
ohci_hcd ehci_pci ehci_hcd usbcore usb_common libata scsi_mod
> [  310.110268] CPU: 0 PID: 366 Comm: btrfs-balance Not tainted
3.12.0-1-00083-g4b97280-dirty #1
> [  310.110268] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS
VirtualBox 12/01/2006
> [  310.110268] task: ffff880078b00000 ti: ffff880078afe000 task.ti:
ffff880078afe000
> [  310.110268] RIP: 0010:[<ffffffffa04f6e8a>] 
[<ffffffffa04f6e8a>] build_backref_tree+0x112a/0x11d0 [btrfs]
> [  310.110268] RSP: 0018:ffff880078affab8  EFLAGS: 00010246
> [  310.110268] RAX: 0000000000000000 RBX: ffff8800784d4000 RCX:
ffff88006a2a9d90
> [  310.110268] RDX: ffff880078affb30 RSI: ffff8800784d4020 RDI:
ffff88006a2a9d80
> [  310.110268] RBP: ffff880078affba0 R08: ffff880077d07e00 R09:
ffff880078affa70
> [  310.110268] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000000
> [  310.110268] R13: ffff880078c95d80 R14: ffff880077d07c80 R15:
ffff88006a2a9d90
> [  310.110268] FS:  0000000000000000(0000) GS:ffff88007fa00000(0000)
knlGS:0000000000000000
> [  310.110268] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [  310.110268] CR2: 00007f51ca3af010 CR3: 000000007bf8d000 CR4:
00000000000006f0
> [  310.110268] Stack:
> [  310.110268]  ffff880077d07d00 0000000000000000 ffff88006a2a9320
ffff880077d07e00
> [  310.110268]  ffff880077d07e00 ffff880078c95d80 ffff88007ad99000
ffff880078c95120
> [  310.110268]  ffff880077d07bc0 ffff8800784d4120 ffff880077d07d00
ffff8800784d4124
> [  310.110268] Call Trace:
> [  310.110268]  [<ffffffffa04f8378>] relocate_tree_blocks+0x1d8/0x630
[btrfs]
> [  310.110268]  [<ffffffffa04f9880>] relocate_block_group+0x280/0x690
[btrfs]
> [  310.110268]  [<ffffffffa04f9e2d>]
btrfs_relocate_block_group+0x19d/0x2e0 [btrfs]
> [  310.110268]  [<ffffffffa04d1a88>]
btrfs_relocate_chunk.isra.28+0x68/0x780 [btrfs]
> [  310.110268]  [<ffffffffa048af08>] ? btrfs_search_slot+0x498/0x970
[btrfs]
> [  310.110268]  [<ffffffffa04c73d9>] ?
release_extent_buffer+0xa9/0xd0 [btrfs]
> [  310.110268]  [<ffffffffa04ccd1f>] ? free_extent_buffer+0x4f/0xa0
[btrfs]
> [  310.110268]  [<ffffffffa04d5033>] btrfs_balance+0x913/0xeb0
[btrfs]
> [  310.110268]  [<ffffffffa04d5640>] balance_kthread+0x70/0x80
[btrfs]
> [  310.110268]  [<ffffffffa04d55d0>] ? btrfs_balance+0xeb0/0xeb0
[btrfs]
> [  310.110268]  [<ffffffff81083b70>] kthread+0xc0/0xd0
> [  310.110268]  [<ffffffff81083ab0>] ?
kthread_create_on_node+0x120/0x120
> [  310.110268]  [<ffffffff814ef37c>] ret_from_fork+0x7c/0xb0
> [  310.110268]  [<ffffffff81083ab0>] ?
kthread_create_on_node+0x120/0x120
> [  310.110268] Code: 4c 89 ef e8 e9 f1 f8 ff 48 8b bd 50 ff ff ff e8 dd f1
f8 ff 48 83 bd 30 ff ff ff 00 0f 85 0c fd ff ff 31 c0 e9 ae ef ff ff 0f 0b
<0f> 0b 48 8b 85 30 ff ff ff 49 8d 7e 20 48 8b 70 18 48 89 c2 e8
> [  310.110268] RIP  [<ffffffffa04f6e8a>]
build_backref_tree+0x112a/0x11d0 [btrfs]
> [  310.110268]  RSP <ffff880078affab8>
> [  310.160477] ---[ end trace 1caf0f84ada634a2 ]---
>
>> > kernel BUG at fs/btrfs/relocation.c:1060!
>> > RIP: 0010:[<ffffffffa04f5d3a>]  [<ffffffffa04f5d3a>]
build_backref_tree+0x112a/0x11d0 [btrfs]
>>
>> This matches the known bug in 3.11, fix was submitted to 3.11.x stable.
>
> The kernel under which I''ve first noticed this issue was 3.11.1.
Should this
> version already contain the fix?
>
> - Guenther
> --
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Guenther Starnberger

2013-Oct-07 00:27 UTC

head link

Re: kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing

On Thu, Sep 26, 2013 at 07:26:07AM +0200, Guenther Starnberger wrote:
> Yes - this also happens on 3.12-rc kernels. Here''s the stacktrace
for 4b97280
> (which is several commits ahead of 3.12-rc2):
As an update to my previous mail: I just tried to continue the balance with an
updated btrfs-next kernel (4380ae355c5c17c150d29bf0c07f44046102ca2e) but
I''m
still seeing the same issue:

[  273.810775] btrfs: disk space caching is enabled
[  273.812257] btrfs: has skinny extents
[  291.906125] BTRFS debug (device dm-0): unlinked 1 orphans
[  291.979115] btrfs: continuing balance
[  296.214254] btrfs: relocating block group 1542996361216 flags 1
[  411.032805] btrfs: found 18 extents
[  449.598891] ------------[ cut here ]------------
[  449.600360] kernel BUG at fs/btrfs/relocation.c:1060!
[  449.601603] invalid opcode: 0000 [#1] PREEMPT SMP 
[  449.601971] Modules linked in: btrfs raid6_pq crc32c libcrc32c zlib_deflate
xor xts gf128mul dm_crypt dm_mod usb_storage snd_intel8x0 snd_ac97_codec
ac97_bus psmouse snd_pcm snd_page_alloc snd_timer ppdev microcode snd joydev
evdev pcspkr serio_raw parport_pc parport i2c_piix4 intel_agp intel_gtt mperf
i2c_core e1000 soundcore processor battery button ac ext4 crc16 mbcache jbd2
hid_generic usbhid hid sr_mod cdrom sd_mod ata_generic pata_acpi ohci_pci
ata_piix ahci libahci ohci_hcd ehci_pci ehci_hcd usbcore usb_common libata
scsi_mod
[  449.601971] CPU: 0 PID: 390 Comm: btrfs-balance Not tainted
3.11.0-1-90707-g4380ae3-dirty #1
[  449.601971] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS
VirtualBox 12/01/2006
[  449.601971] task: ffff88007ad45cd0 ti: ffff8800786e4000 task.ti:
ffff8800786e4000
[  449.601971] RIP: 0010:[<ffffffffa04f5f1a>]  [<ffffffffa04f5f1a>]
build_backref_tree+0x112a/0x11d0 [btrfs]
[  449.601971] RSP: 0018:ffff8800786e5ab8  EFLAGS: 00010246
[  449.601971] RAX: 0000000000000000 RBX: ffff88007ad6e800 RCX: ffff8800780c81d0
[  449.601971] RDX: ffff8800786e5b30 RSI: ffff88007ad6e820 RDI: ffff8800780c81c0
[  449.601971] RBP: ffff8800786e5ba0 R08: ffff88007806d000 R09: ffff8800786e5a70
[  449.601971] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[  449.601971] R13: ffff88007888a120 R14: ffff88007806d600 R15: ffff8800780c81d0
[  449.601971] FS:  0000000000000000(0000) GS:ffff88007fa00000(0000)
knlGS:0000000000000000
[  449.601971] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  449.601971] CR2: 00007fe6529864f0 CR3: 000000007bb99000 CR4: 00000000000006f0
[  449.601971] Stack:
[  449.601971]  ffff88007806da80 0000000000000000 ffff8800780c8060
ffff88007806d000
[  449.601971]  ffff88007806d000 ffff88007888a120 ffff88007ad6e000
ffff88007888a240
[  449.601971]  ffff88007806d340 ffff88007ad6e920 ffff88007806da80
ffff88007ad6e924
[  449.601971] Call Trace:
[  449.601971]  [<ffffffffa04f7408>] relocate_tree_blocks+0x1d8/0x630
[btrfs]
[  449.601971]  [<ffffffffa04f8920>] relocate_block_group+0x280/0x690
[btrfs]
[  449.601971]  [<ffffffffa04f8ecd>]
btrfs_relocate_block_group+0x19d/0x2e0 [btrfs]
[  449.601971]  [<ffffffffa04d0ca8>]
btrfs_relocate_chunk.isra.28+0x68/0x780 [btrfs]
[  449.601971]  [<ffffffffa0489dd8>] ? btrfs_search_slot+0x498/0x970
[btrfs]
[  449.601971]  [<ffffffffa04c6499>] ? release_extent_buffer+0xa9/0xd0
[btrfs]
[  449.601971]  [<ffffffffa04cbdff>] ? free_extent_buffer+0x4f/0xa0
[btrfs]
[  449.601971]  [<ffffffffa04d40c3>] btrfs_balance+0x913/0xeb0 [btrfs]
[  449.601971]  [<ffffffffa04d46d0>] balance_kthread+0x70/0x80 [btrfs]
[  449.601971]  [<ffffffffa04d4660>] ? btrfs_balance+0xeb0/0xeb0 [btrfs]
[  449.601971]  [<ffffffff81083680>] kthread+0xc0/0xd0
[  449.601971]  [<ffffffff810835c0>] ? kthread_create_on_node+0x120/0x120
[  449.601971]  [<ffffffff814ddeac>] ret_from_fork+0x7c/0xb0
[  449.601971]  [<ffffffff810835c0>] ? kthread_create_on_node+0x120/0x120
[  449.601971] Code: 4c 89 ef e8 29 f0 f8 ff 48 8b bd 50 ff ff ff e8 1d f0 f8 ff
48 83 bd 30 ff ff ff 00 0f 85 0c fd ff ff 31 c0 e9 ae ef ff ff 0f 0b <0f>
0b 48 8b 85 30 ff ff ff 49 8d 7e 20 48 8b 70 18 48 89 c2 e8
[  449.601971] RIP  [<ffffffffa04f5f1a>] build_backref_tree+0x112a/0x11d0
[btrfs]
[  449.601971]  RSP <ffff8800786e5ab8>
[  449.645464] ---[ end trace 0478746bd226d078 ]---

- Guenther
--
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Jan Krcmar

2013-Oct-07 08:09 UTC

head link

Re: kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing

hi,

i''ve got the same problem "kernel BUG at
fs/btrfs/relocation.c:1060".
this was solved by patching the kernel with following patch
https://git.kernel.org/cgit/linux/kernel/git/josef/btrfs-next.git/commit/?id=b6c60c8018c4e9beb2f83fc82c09f9d033766571

i''ve also found, that this patch is NOT included in 3.11.x stable
kernel tree. see here to confim the absence
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/fs/btrfs/relocation.c?id=refs/tags/v3.11.4

fous

2013/10/7 Guenther Starnberger
<linux-btrfs@gst.priv.at>:> On Thu, Sep 26, 2013 at 07:26:07AM +0200, Guenther Starnberger wrote:
>
>> Yes - this also happens on 3.12-rc kernels. Here''s the
stacktrace for 4b97280
>> (which is several commits ahead of 3.12-rc2):
>
> As an update to my previous mail: I just tried to continue the balance with
an
> updated btrfs-next kernel (4380ae355c5c17c150d29bf0c07f44046102ca2e) but
I''m
> still seeing the same issue:
>
> [  273.810775] btrfs: disk space caching is enabled
> [  273.812257] btrfs: has skinny extents
> [  291.906125] BTRFS debug (device dm-0): unlinked 1 orphans
> [  291.979115] btrfs: continuing balance
> [  296.214254] btrfs: relocating block group 1542996361216 flags 1
> [  411.032805] btrfs: found 18 extents
> [  449.598891] ------------[ cut here ]------------
> [  449.600360] kernel BUG at fs/btrfs/relocation.c:1060!
> [  449.601603] invalid opcode: 0000 [#1] PREEMPT SMP
> [  449.601971] Modules linked in: btrfs raid6_pq crc32c libcrc32c
zlib_deflate xor xts gf128mul dm_crypt dm_mod usb_storage snd_intel8x0
snd_ac97_codec ac97_bus psmouse snd_pcm snd_page_alloc snd_timer ppdev microcode
snd joydev evdev pcspkr serio_raw parport_pc parport i2c_piix4 intel_agp
intel_gtt mperf i2c_core e1000 soundcore processor battery button ac ext4 crc16
mbcache jbd2 hid_generic usbhid hid sr_mod cdrom sd_mod ata_generic pata_acpi
ohci_pci ata_piix ahci libahci ohci_hcd ehci_pci ehci_hcd usbcore usb_common
libata scsi_mod
> [  449.601971] CPU: 0 PID: 390 Comm: btrfs-balance Not tainted
3.11.0-1-90707-g4380ae3-dirty #1
> [  449.601971] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS
VirtualBox 12/01/2006
> [  449.601971] task: ffff88007ad45cd0 ti: ffff8800786e4000 task.ti:
ffff8800786e4000
> [  449.601971] RIP: 0010:[<ffffffffa04f5f1a>] 
[<ffffffffa04f5f1a>] build_backref_tree+0x112a/0x11d0 [btrfs]
> [  449.601971] RSP: 0018:ffff8800786e5ab8  EFLAGS: 00010246
> [  449.601971] RAX: 0000000000000000 RBX: ffff88007ad6e800 RCX:
ffff8800780c81d0
> [  449.601971] RDX: ffff8800786e5b30 RSI: ffff88007ad6e820 RDI:
ffff8800780c81c0
> [  449.601971] RBP: ffff8800786e5ba0 R08: ffff88007806d000 R09:
ffff8800786e5a70
> [  449.601971] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000000
> [  449.601971] R13: ffff88007888a120 R14: ffff88007806d600 R15:
ffff8800780c81d0
> [  449.601971] FS:  0000000000000000(0000) GS:ffff88007fa00000(0000)
knlGS:0000000000000000
> [  449.601971] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [  449.601971] CR2: 00007fe6529864f0 CR3: 000000007bb99000 CR4:
00000000000006f0
> [  449.601971] Stack:
> [  449.601971]  ffff88007806da80 0000000000000000 ffff8800780c8060
ffff88007806d000
> [  449.601971]  ffff88007806d000 ffff88007888a120 ffff88007ad6e000
ffff88007888a240
> [  449.601971]  ffff88007806d340 ffff88007ad6e920 ffff88007806da80
ffff88007ad6e924
> [  449.601971] Call Trace:
> [  449.601971]  [<ffffffffa04f7408>] relocate_tree_blocks+0x1d8/0x630
[btrfs]
> [  449.601971]  [<ffffffffa04f8920>] relocate_block_group+0x280/0x690
[btrfs]
> [  449.601971]  [<ffffffffa04f8ecd>]
btrfs_relocate_block_group+0x19d/0x2e0 [btrfs]
> [  449.601971]  [<ffffffffa04d0ca8>]
btrfs_relocate_chunk.isra.28+0x68/0x780 [btrfs]
> [  449.601971]  [<ffffffffa0489dd8>] ? btrfs_search_slot+0x498/0x970
[btrfs]
> [  449.601971]  [<ffffffffa04c6499>] ?
release_extent_buffer+0xa9/0xd0 [btrfs]
> [  449.601971]  [<ffffffffa04cbdff>] ? free_extent_buffer+0x4f/0xa0
[btrfs]
> [  449.601971]  [<ffffffffa04d40c3>] btrfs_balance+0x913/0xeb0
[btrfs]
> [  449.601971]  [<ffffffffa04d46d0>] balance_kthread+0x70/0x80
[btrfs]
> [  449.601971]  [<ffffffffa04d4660>] ? btrfs_balance+0xeb0/0xeb0
[btrfs]
> [  449.601971]  [<ffffffff81083680>] kthread+0xc0/0xd0
> [  449.601971]  [<ffffffff810835c0>] ?
kthread_create_on_node+0x120/0x120
> [  449.601971]  [<ffffffff814ddeac>] ret_from_fork+0x7c/0xb0
> [  449.601971]  [<ffffffff810835c0>] ?
kthread_create_on_node+0x120/0x120
> [  449.601971] Code: 4c 89 ef e8 29 f0 f8 ff 48 8b bd 50 ff ff ff e8 1d f0
f8 ff 48 83 bd 30 ff ff ff 00 0f 85 0c fd ff ff 31 c0 e9 ae ef ff ff 0f 0b
<0f> 0b 48 8b 85 30 ff ff ff 49 8d 7e 20 48 8b 70 18 48 89 c2 e8
> [  449.601971] RIP  [<ffffffffa04f5f1a>]
build_backref_tree+0x112a/0x11d0 [btrfs]
> [  449.601971]  RSP <ffff8800786e5ab8>
> [  449.645464] ---[ end trace 0478746bd226d078 ]---
>
> - Guenther
> --
> To unsubscribe from this list: send the line "unsubscribe
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> the body of a message to majordomo@vger.kernel.org
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Btrfs devel - Sep 2013 - kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing

kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing

Re: kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing

Re: kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing

Re: kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing

Re: kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing

Re: kernel BUG at fs/btrfs/relocation.c:1060 during rebalancing