thr3ads.net - Btrfs devel - kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7) [Aug 2012]

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Olivier Bonvalet

2012-Aug-01 19:48 UTC

kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

Hi,

I have some trouble with a btrfs filesystem.
As you can see in logs, there is lines which are from btrfs (I supposed), then
some warnings at fs/btrfs/extent-tree.c, and finally a "kernel BUG" at
fs/btrfs/extent-tree.c:5038.

Do you need more informations ?


Aug  1 21:23:10 backup2 kernel: [    7.015184] Btrfs loaded
Aug  1 21:23:10 backup2 kernel: [    7.023314] device fsid
a5dfe512-c8a3-46f0-bc8c-6365b8eccdcb devid 1 transid 110423
/dev/mapper/vg--backupplug-backup
Aug  1 21:23:10 backup2 kernel: [    7.024405] btrfs: force zlib compression
Aug  1 21:23:10 backup2 kernel: [    7.024414] btrfs: not using ssd allocation
scheme
Aug  1 21:23:10 backup2 kernel: [   17.938241] NET: Registered protocol family
10
Aug  1 21:26:53 backup2 kernel: [   28.880027] eth0: no IPv6 routers present
Aug  1 21:33:39 backup2 kernel: [  435.285128] leaf 615015878656 total ptrs 28
free space 1651
Aug  1 21:33:39 backup2 kernel: [  435.285146] 	item 0 key (642867957760 a8
4096) itemoff 3944 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285153] 		extent refs 1 gen 108436 flags
2
Aug  1 21:33:39 backup2 kernel: [  435.285162] 		tree block key
(18446744073709551606 80 1215799304192) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285171] 		tree block backref root 7
Aug  1 21:33:39 backup2 kernel: [  435.285179] 	item 1 key (642867970048 a8
4096) itemoff 3893 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285186] 		extent refs 1 gen 38936 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285196] 		tree block key (401571 54
2912287038) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285202] 		shared block backref parent
615081041920
Aug  1 21:33:39 backup2 kernel: [  435.285208] 	item 2 key (642867994624 a8
4096) itemoff 3824 itemsize 69
Aug  1 21:33:39 backup2 kernel: [  435.285214] 		extent refs 3 gen 38909 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285221] 		tree block key (13092 c 12250)
level 0
Aug  1 21:33:39 backup2 kernel: [  435.285226] 		shared block backref parent
1306797543424
Aug  1 21:33:39 backup2 kernel: [  435.285231] 		shared block backref parent
1306797494272
Aug  1 21:33:39 backup2 kernel: [  435.285236] 		shared block backref parent
647007399936
Aug  1 21:33:39 backup2 kernel: [  435.285242] 	item 3 key (642868002816 a8
4096) itemoff 3773 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285248] 		extent refs 1 gen 44304 flags 2
Aug  1 21:33:39 backup2 kernel: [  435.285255] 		tree block key (1824364519424
a8 94208) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285260] 		tree block backref root 2
Aug  1 21:33:39 backup2 kernel: [  435.285265] 	item 4 key (642868006912 a8
4096) itemoff 3722 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285271] 		extent refs 1 gen 44304 flags 2
Aug  1 21:33:39 backup2 kernel: [  435.285278] 		tree block key (1824369225728
a8 118784) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285284] 		tree block backref root 2
Aug  1 21:33:39 backup2 kernel: [  435.285289] 	item 5 key (642868011008 a8
4096) itemoff 3671 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285295] 		extent refs 1 gen 101712 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285302] 		tree block key (833 6c
162816000) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285307] 		shared block backref parent
617940144128
Aug  1 21:33:39 backup2 kernel: [  435.285313] 	item 6 key (642868015104 a8
4096) itemoff 3593 itemsize 78
Aug  1 21:33:39 backup2 kernel: [  435.285321] 		extent refs 4 gen 38909 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285326] 		tree block key (17721 60 119)
level 0
Aug  1 21:33:39 backup2 kernel: [  435.285331] 		shared block backref parent
1314062098432
Aug  1 21:33:39 backup2 kernel: [  435.285336] 		shared block backref parent
1314062094336
Aug  1 21:33:39 backup2 kernel: [  435.285341] 		shared block backref parent
1312740683776
Aug  1 21:33:39 backup2 kernel: [  435.285348] 		shared block backref parent
1312740675584
Aug  1 21:33:39 backup2 kernel: [  435.285354] 	item 7 key (642868019200 a8
4096) itemoff 3542 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285360] 		extent refs 1 gen 44307 flags 2
Aug  1 21:33:39 backup2 kernel: [  435.285365] 		tree block key
(18446744073709551606 80 1825532395520) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285373] 		tree block backref root 7
Aug  1 21:33:39 backup2 kernel: [  435.285378] 	item 8 key (642868023296 a8
4096) itemoff 3491 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285384] 		extent refs 1 gen 101712 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285389] 		tree block key (833 6c
161284096) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285396] 		shared block backref parent
617940144128
Aug  1 21:33:39 backup2 kernel: [  435.285402] 	item 9 key (642868027392 a8
4096) itemoff 3440 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285408] 		extent refs 1 gen 106320 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285416] 		tree block key (708 6c 4009984)
level 0
Aug  1 21:33:39 backup2 kernel: [  435.285421] 		shared block backref parent
643144060928
Aug  1 21:33:39 backup2 kernel: [  435.285426] 	item 10 key (642868031488 a8
4096) itemoff 3389 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285433] 		extent refs 1 gen 101179 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285440] 		tree block key (554 6c
45199360) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285445] 		shared block backref parent
644377743360
Aug  1 21:33:39 backup2 kernel: [  435.285450] 	item 11 key (642868035584 a8
4096) itemoff 3338 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285458] 		extent refs 1 gen 109814 flags
2
Aug  1 21:33:39 backup2 kernel: [  435.285464] 		tree block key (1393123659776
a8 118784) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285469] 		tree block backref root 2
Aug  1 21:33:39 backup2 kernel: [  435.285474] 	item 12 key (642868043776 a8
4096) itemoff 3287 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285480] 		extent refs 1 gen 109814 flags
2
Aug  1 21:33:39 backup2 kernel: [  435.285487] 		tree block key (1393124843520
b8 618853261312) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285493] 		tree block backref root 2
Aug  1 21:33:39 backup2 kernel: [  435.285498] 	item 13 key (642868056064 a8
4096) itemoff 3236 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285506] 		extent refs 1 gen 109232 flags
2
Aug  1 21:33:39 backup2 kernel: [  435.285511] 		tree block key (1299755941888
a8 16384) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285516] 		tree block backref root 2
Aug  1 21:33:39 backup2 kernel: [  435.285521] 	item 14 key (642868060160 a8
4096) itemoff 3185 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285527] 		extent refs 1 gen 44304 flags 2
Aug  1 21:33:39 backup2 kernel: [  435.285532] 		tree block key (1824360902656
a8 81920) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285538] 		tree block backref root 2
Aug  1 21:33:39 backup2 kernel: [  435.285543] 	item 15 key (642868064256 a8
4096) itemoff 3134 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285550] 		extent refs 1 gen 107019 flags
2
Aug  1 21:33:39 backup2 kernel: [  435.285556] 		tree block key
(18446744073709551606 80 1362292793344) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285562] 		tree block backref root 7
Aug  1 21:33:39 backup2 kernel: [  435.285567] 	item 16 key (642868068352 a8
4096) itemoff 3065 itemsize 69
Aug  1 21:33:39 backup2 kernel: [  435.285573] 		extent refs 3 gen 38909 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285579] 		tree block key (13089 c 12249)
level 0
Aug  1 21:33:39 backup2 kernel: [  435.285585] 		shared block backref parent
1306797543424
Aug  1 21:33:39 backup2 kernel: [  435.285592] 		shared block backref parent
1306797494272
Aug  1 21:33:39 backup2 kernel: [  435.285597] 		shared block backref parent
647007399936
Aug  1 21:33:39 backup2 kernel: [  435.285603] 	item 17 key (642868072448 a8
4096) itemoff 3014 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285609] 		extent refs 1 gen 107019 flags
2
Aug  1 21:33:39 backup2 kernel: [  435.285614] 		tree block key
(18446744073709551606 80 1362289672192) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285623] 		tree block backref root 7
Aug  1 21:33:39 backup2 kernel: [  435.285628] 	item 18 key (642868076544 a8
4096) itemoff 2945 itemsize 69
Aug  1 21:33:39 backup2 kernel: [  435.285634] 		extent refs 3 gen 97165 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285639] 		tree block key (3262 54
2184751459) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285649] 		shared block backref parent
646044622848
Aug  1 21:33:39 backup2 kernel: [  435.285654] 		shared block backref parent
644201959424
Aug  1 21:33:39 backup2 kernel: [  435.285659] 		shared block backref parent
642867171328
Aug  1 21:33:39 backup2 kernel: [  435.285664] 	item 19 key (642868080640 a8
4096) itemoff 2876 itemsize 69
Aug  1 21:33:39 backup2 kernel: [  435.285673] 		extent refs 3 gen 38909 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285678] 		tree block key (13113 6c 0)
level 0
Aug  1 21:33:39 backup2 kernel: [  435.285685] 		shared block backref parent
1306797543424
Aug  1 21:33:39 backup2 kernel: [  435.285692] 		shared block backref parent
1306797494272
Aug  1 21:33:39 backup2 kernel: [  435.285697] 		shared block backref parent
647007399936
Aug  1 21:33:39 backup2 kernel: [  435.285703] 	item 20 key (642868084736 a8
4096) itemoff 2726 itemsize 150
Aug  1 21:33:39 backup2 kernel: [  435.285710] 		extent refs 12 gen 97165 flags
2
Aug  1 21:33:39 backup2 kernel: [  435.285717] 		tree block key (3262 54
2256339809) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285722] 		tree block backref root 2698
Aug  1 21:33:39 backup2 kernel: [  435.285726] 		shared block backref parent
646044622848
Aug  1 21:33:39 backup2 kernel: [  435.285733] 		shared block backref parent
645667573760
Aug  1 21:33:39 backup2 kernel: [  435.285738] 		shared block backref parent
645339078656
Aug  1 21:33:39 backup2 kernel: [  435.285743] 		shared block backref parent
644201959424
Aug  1 21:33:39 backup2 kernel: [  435.285748] 		shared block backref parent
643792703488
Aug  1 21:33:39 backup2 kernel: [  435.285753] 		shared block backref parent
643459452928
Aug  1 21:33:39 backup2 kernel: [  435.285759] 		shared block backref parent
643412889600
Aug  1 21:33:39 backup2 kernel: [  435.285764] 		shared block backref parent
642959036416
Aug  1 21:33:39 backup2 kernel: [  435.285769] 		shared block backref parent
642867171328
Aug  1 21:33:39 backup2 kernel: [  435.285774] 		shared block backref parent
642865500160
Aug  1 21:33:39 backup2 kernel: [  435.285781] 		shared block backref parent
618298048512
Aug  1 21:33:39 backup2 kernel: [  435.285787] 	item 21 key (642868088832 a8
4096) itemoff 2675 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285793] 		extent refs 1 gen 38909 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285798] 		tree block key (1788 54
2201505456) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285805] 		shared block backref parent
615111450624
Aug  1 21:33:39 backup2 kernel: [  435.285811] 	item 22 key (642868092928 a8
4096) itemoff 2606 itemsize 69
Aug  1 21:33:39 backup2 kernel: [  435.285817] 		extent refs 3 gen 38909 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285822] 		tree block key (13116 c 12250)
level 0
Aug  1 21:33:39 backup2 kernel: [  435.285827] 		shared block backref parent
1306797543424
Aug  1 21:33:39 backup2 kernel: [  435.285834] 		shared block backref parent
1306797494272
Aug  1 21:33:39 backup2 kernel: [  435.285839] 		shared block backref parent
647007399936
Aug  1 21:33:39 backup2 kernel: [  435.285845] 	item 23 key (642868097024 a8
4096) itemoff 2555 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285853] 		extent refs 1 gen 109232 flags
2
Aug  1 21:33:39 backup2 kernel: [  435.285864] 		tree block key (1299832553472
a8 8192) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285871] 		tree block backref root 2
Aug  1 21:33:39 backup2 kernel: [  435.285877] 	item 24 key (642868101120 a8
4096) itemoff 2504 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285885] 		extent refs 1 gen 102767 flags
2
Aug  1 21:33:39 backup2 kernel: [  435.285893] 		tree block key
(18446744073709551606 80 1488237449216) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285899] 		tree block backref root 7
Aug  1 21:33:39 backup2 kernel: [  435.285904] 	item 25 key (642868105216 a8
4096) itemoff 2453 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285912] 		extent refs 1 gen 109232 flags
2
Aug  1 21:33:39 backup2 kernel: [  435.285917] 		tree block key (1299832934400
a8 4096) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285923] 		tree block backref root 2
Aug  1 21:33:39 backup2 kernel: [  435.285927] 	item 26 key (642868109312 a8
4096) itemoff 2402 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285935] 		extent refs 1 gen 101712 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285941] 		tree block key (833 6c
164655104) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285946] 		shared block backref parent
617940144128
Aug  1 21:33:39 backup2 kernel: [  435.285951] 	item 27 key (642868113408 a8
4096) itemoff 2351 itemsize 51
Aug  1 21:33:39 backup2 kernel: [  435.285957] 		extent refs 1 gen 101712 flags
258
Aug  1 21:33:39 backup2 kernel: [  435.285962] 		tree block key (833 6c
168382464) level 0
Aug  1 21:33:39 backup2 kernel: [  435.285967] 		shared block backref parent
617940144128
Aug  1 21:33:39 backup2 kernel: [  435.285972] ------------[ cut here
]------------
Aug  1 21:33:39 backup2 kernel: [  435.285994] WARNING: at
fs/btrfs/extent-tree.c:5022 __btrfs_free_extent+0x2a9/0x5cf [btrfs]()
Aug  1 21:33:39 backup2 kernel: [  435.286002] Modules linked in: xt_LOG
nf_conntrack_ipv4 nf_defrag_ipv4 ipv6 xt_state btrfs nf_conntrack
Aug  1 21:33:39 backup2 kernel: [  435.286019] Pid: 1651, comm: btrfs-transacti
Tainted: G         C   2.6.44.7-dae-xen #2
Aug  1 21:33:39 backup2 kernel: [  435.286026] Call Trace:
Aug  1 21:33:39 backup2 kernel: [  435.286035]  [<ffffffff8103c7cf>] ?
warn_slowpath_common+0x76/0x8a
Aug  1 21:33:39 backup2 kernel: [  435.286049]  [<ffffffffa002ab4e>] ?
__btrfs_free_extent+0x2a9/0x5cf [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.286058]  [<ffffffff813007dc>] ?
__slab_free+0xd7/0x271
Aug  1 21:33:39 backup2 kernel: [  435.286077]  [<ffffffffa006fae5>] ?
arch_spin_is_locked+0x5/0x8 [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.286093]  [<ffffffffa002e09c>] ?
run_clustered_refs+0x72b/0x7c2 [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.286108]  [<ffffffffa0027010>] ?
spin_unlock+0x5/0x8 [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.286123]  [<ffffffffa002e34c>] ?
btrfs_run_delayed_refs+0x219/0x318 [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.286144]  [<ffffffffa0077cda>] ?
btrfs_run_delayed_items+0x106/0x12b [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.286153]  [<ffffffff8106e62f>] ?
do_raw_spin_unlock+0x5/0x8
Aug  1 21:33:39 backup2 kernel: [  435.286160]  [<ffffffff8106e5f7>] ?
arch_local_irq_restore+0x7/0x8
Aug  1 21:33:39 backup2 kernel: [  435.286178]  [<ffffffffa003bbb5>] ?
btrfs_commit_transaction+0x3b5/0x875 [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.286187]  [<ffffffff8106e5f7>] ?
arch_local_irq_restore+0x7/0x8
Aug  1 21:33:39 backup2 kernel: [  435.286195]  [<ffffffff81051c0e>] ?
abort_exclusive_wait+0x79/0x79
Aug  1 21:33:39 backup2 kernel: [  435.286213]  [<ffffffffa003b1e2>] ?
join_transaction.isra.28+0x283/0x291 [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.286233]  [<ffffffffa003c4be>] ?
start_transaction+0x1f4/0x24b [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.286250]  [<ffffffffa0035e9e>] ?
transaction_kthread+0x17a/0x22e [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.485313]  [<ffffffffa0035d24>] ?
try_to_freeze+0x2c/0x2c [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.485331]  [<ffffffff8105173a>] ?
kthread+0x7d/0x85
Aug  1 21:33:39 backup2 kernel: [  435.485342]  [<ffffffff81305c64>] ?
kernel_thread_helper+0x4/0x10
Aug  1 21:33:39 backup2 kernel: [  435.485353]  [<ffffffff813041b8>] ?
retint_restore_args+0x5/0x6
Aug  1 21:33:39 backup2 kernel: [  435.485362]  [<ffffffff81305c60>] ?
gs_change+0x13/0x13
Aug  1 21:33:39 backup2 kernel: [  435.485371] ---[ end trace d5809b3a28fe4bda
]---
Aug  1 21:33:39 backup2 kernel: [  435.485382] btrfs unable to find ref byte nr
642867965952 parent 0 root 5  owner 1 offset 0
Aug  1 21:33:39 backup2 kernel: [  435.485395] ------------[ cut here
]------------
Aug  1 21:33:39 backup2 kernel: [  435.485412] WARNING: at
fs/btrfs/extent-tree.c:5073 __btrfs_free_extent+0x40f/0x5cf [btrfs]()
Aug  1 21:33:39 backup2 kernel: [  435.485423] Modules linked in: xt_LOG
nf_conntrack_ipv4 nf_defrag_ipv4 ipv6 xt_state btrfs nf_conntrack
Aug  1 21:33:39 backup2 kernel: [  435.485451] Pid: 1651, comm: btrfs-transacti
Tainted: G        WC   2.6.44.7-dae-xen #2
Aug  1 21:33:39 backup2 kernel: [  435.485461] Call Trace:
Aug  1 21:33:39 backup2 kernel: [  435.485470]  [<ffffffff8103c7cf>] ?
warn_slowpath_common+0x76/0x8a
Aug  1 21:33:39 backup2 kernel: [  435.485488]  [<ffffffffa002acb4>] ?
__btrfs_free_extent+0x40f/0x5cf [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.485500]  [<ffffffff813007dc>] ?
__slab_free+0xd7/0x271
Aug  1 21:33:39 backup2 kernel: [  435.485523]  [<ffffffffa006fae5>] ?
arch_spin_is_locked+0x5/0x8 [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.485542]  [<ffffffffa002e09c>] ?
run_clustered_refs+0x72b/0x7c2 [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.485561]  [<ffffffffa0027010>] ?
spin_unlock+0x5/0x8 [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.485581]  [<ffffffffa002e34c>] ?
btrfs_run_delayed_refs+0x219/0x318 [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.485606]  [<ffffffffa0077cda>] ?
btrfs_run_delayed_items+0x106/0x12b [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.485618]  [<ffffffff8106e62f>] ?
do_raw_spin_unlock+0x5/0x8
Aug  1 21:33:39 backup2 kernel: [  435.485630]  [<ffffffff8106e5f7>] ?
arch_local_irq_restore+0x7/0x8
Aug  1 21:33:39 backup2 kernel: [  435.485653]  [<ffffffffa003bbb5>] ?
btrfs_commit_transaction+0x3b5/0x875 [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.485665]  [<ffffffff8106e5f7>] ?
arch_local_irq_restore+0x7/0x8
Aug  1 21:33:39 backup2 kernel: [  435.485675]  [<ffffffff81051c0e>] ?
abort_exclusive_wait+0x79/0x79
Aug  1 21:33:39 backup2 kernel: [  435.485699]  [<ffffffffa003b1e2>] ?
join_transaction.isra.28+0x283/0x291 [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.485724]  [<ffffffffa003c4be>] ?
start_transaction+0x1f4/0x24b [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.485747]  [<ffffffffa0035e9e>] ?
transaction_kthread+0x17a/0x22e [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.485770]  [<ffffffffa0035d24>] ?
try_to_freeze+0x2c/0x2c [btrfs]
Aug  1 21:33:39 backup2 kernel: [  435.485782]  [<ffffffff8105173a>] ?
kthread+0x7d/0x85
Aug  1 21:33:39 backup2 kernel: [  435.485788]  [<ffffffff81305c64>] ?
kernel_thread_helper+0x4/0x10
Aug  1 21:33:39 backup2 kernel: [  435.485796]  [<ffffffff813041b8>] ?
retint_restore_args+0x5/0x6
Aug  1 21:33:39 backup2 kernel: [  435.485805]  [<ffffffff81305c60>] ?
gs_change+0x13/0x13
Aug  1 21:33:39 backup2 kernel: [  435.485813] ---[ end trace d5809b3a28fe4bdb
]---
Aug  1 21:33:39 backup2 kernel: [  435.488037] parent transid verify failed on
615015964672 wanted 110423 found 110424
Aug  1 21:33:40 backup2 kernel: [  435.520841] btrfs read error corrected: ino 1
off 615015964672 (dev /dev/mapper/vg--backupplug-backup sector 1209083760)
Aug  1 21:33:40 backup2 kernel: [  435.520896] leaf 615015903232 total ptrs 52
free space 1114
Aug  1 21:33:40 backup2 kernel: [  435.520904] 	item 0 key (615015927808 b6
615143944192) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.520910] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.520915] 	item 1 key (615015927808 b6
615143989248) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.520922] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.520926] 	item 2 key (615015927808 b6
618017591296) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.520933] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.520937] 	item 3 key (615015927808 b6
618393165824) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.520944] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.520949] 	item 4 key (615015927808 b6
618466762752) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.520955] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.520960] 	item 5 key (615015927808 b6
618605518848) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.520966] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.520971] 	item 6 key (615015927808 b6
632293793792) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.520977] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.520982] 	item 7 key (615015927808 b6
632419733504) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.520989] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.520993] 	item 8 key (615015927808 b6
632459755520) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.521000] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.521005] 	item 9 key (615015927808 b6
642169331712) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.521011] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.521016] 	item 10 key (615015927808 b6
642706571264) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.521022] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.521027] 	item 11 key (615015927808 b6
643082162176) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.521033] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.521038] 	item 12 key (615015927808 b6
644046438400) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.521044] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.521049] 	item 13 key (615015927808 b6
644105711616) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.521055] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.521060] 	item 14 key (615015927808 b6
645157392384) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.521067] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.521071] 	item 15 key (615015927808 b6
645949968384) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.521078] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.521082] 	item 16 key (615015927808 b6
646083702784) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.685205] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.685219] 	item 17 key (615015927808 b6
647496245248) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.685236] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.685247] 	item 18 key (615015927808 b6
647586762752) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.685264] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.685274] 	item 19 key (615015927808 b6
1312669048832) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.685291] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.685301] 	item 20 key (615015927808 b6
1350289035264) itemoff 3995 itemsize 0
Aug  1 21:33:40 backup2 kernel: [  435.685318] 		shared block backref
Aug  1 21:33:40 backup2 kernel: [  435.685329] 	item 21 key (615015931904 a8
4096) itemoff 3944 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685345] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.685356] 		tree block key (632346750976 a8
4096) level 0
Aug  1 21:33:40 backup2 kernel: [  435.685370] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.685380] 	item 22 key (615015936000 a8
4096) itemoff 3893 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685397] 		extent refs 1 gen 44855 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.685408] 		tree block key (350585 54
3891015556) level 1
Aug  1 21:33:40 backup2 kernel: [  435.685423] 		shared block backref parent
1312623005696
Aug  1 21:33:40 backup2 kernel: [  435.685435] 	item 23 key (615015940096 a8
4096) itemoff 3842 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685451] 		extent refs 1 gen 44855 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.685462] 		tree block key (350585 54
3892699538) level 0
Aug  1 21:33:40 backup2 kernel: [  435.685476] 		shared block backref parent
615015936000
Aug  1 21:33:40 backup2 kernel: [  435.685489] 	item 24 key (615015944192 a8
4096) itemoff 3791 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685505] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.685516] 		tree block key (632346931200 a8
4096) level 0
Aug  1 21:33:40 backup2 kernel: [  435.685526] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.685536] 	item 25 key (615015948288 a8
4096) itemoff 3740 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685553] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.685564] 		tree block key (632347131904 a8
4096) level 0
Aug  1 21:33:40 backup2 kernel: [  435.685578] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.685586] 	item 26 key (615015952384 a8
4096) itemoff 3689 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685598] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.685609] 		tree block key (632348577792 a8
4096) level 0
Aug  1 21:33:40 backup2 kernel: [  435.685618] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.685626] 	item 27 key (615015956480 a8
4096) itemoff 3638 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685639] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.685648] 		tree block key (632349069312 a8
4096) level 0
Aug  1 21:33:40 backup2 kernel: [  435.685659] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.685667] 	item 28 key (615015960576 a8
4096) itemoff 3587 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685677] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.685688] 		tree block key (615015415808 a8
4096) level 0
Aug  1 21:33:40 backup2 kernel: [  435.685696] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.685704] 	item 29 key (615015964672 a8
4096) itemoff 3536 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685717] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.685726] 		tree block key (632218943488 a8
4096) level 1
Aug  1 21:33:40 backup2 kernel: [  435.685734] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.685745] 	item 30 key (615015968768 a8
4096) itemoff 3485 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685755] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.685763] 		tree block key (632227590144 a8
4096) level 0
Aug  1 21:33:40 backup2 kernel: [  435.685775] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.685784] 	item 31 key (615015972864 a8
4096) itemoff 3434 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685800] 		extent refs 1 gen 44855 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.685811] 		tree block key (66190 54
758361044) level 1
Aug  1 21:33:40 backup2 kernel: [  435.685826] 		shared block backref parent
1317943054336
Aug  1 21:33:40 backup2 kernel: [  435.685838] 	item 32 key (615015976960 a8
4096) itemoff 3383 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685854] 		extent refs 1 gen 44855 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.685864] 		tree block key (66190 54
2794591185) level 0
Aug  1 21:33:40 backup2 kernel: [  435.685876] 		shared block backref parent
615015972864
Aug  1 21:33:40 backup2 kernel: [  435.685891] 	item 33 key (615015981056 a8
4096) itemoff 3332 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685904] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.685918] 		tree block key (632262762496 a8
4096) level 1
Aug  1 21:33:40 backup2 kernel: [  435.685929] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.685942] 	item 34 key (615015985152 a8
4096) itemoff 3281 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.685955] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.685969] 		tree block key (632271273984 a8
4096) level 0
Aug  1 21:33:40 backup2 kernel: [  435.685981] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.685994] 	item 35 key (615015989248 a8
4096) itemoff 3230 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.686007] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.686018] 		tree block key (632289968128 a8
4096) level 1
Aug  1 21:33:40 backup2 kernel: [  435.686027] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.686034] 	item 36 key (615015993344 a8
4096) itemoff 3179 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.686042] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.686050] 		tree block key (632301543424 b6
645726699520) level 0
Aug  1 21:33:40 backup2 kernel: [  435.686058] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.686065] 	item 37 key (615015997440 a8
4096) itemoff 3128 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.686074] 		extent refs 1 gen 68796 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.686081] 		tree block key (1448 54
1555482842) level 0
Aug  1 21:33:40 backup2 kernel: [  435.686088] 		shared block backref parent
642470191104
Aug  1 21:33:40 backup2 kernel: [  435.686096] 	item 38 key (615016001536 a8
4096) itemoff 3077 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.686105] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.686113] 		tree block key (632302252032 a8
4096) level 1
Aug  1 21:33:40 backup2 kernel: [  435.686120] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.686127] 	item 39 key (615016005632 a8
4096) itemoff 3026 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.686136] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.686143] 		tree block key (632302252032 a8
4096) level 0
Aug  1 21:33:40 backup2 kernel: [  435.686150] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.686157] 	item 40 key (615016009728 a8
4096) itemoff 2975 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.686166] 		extent refs 1 gen 44855 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.686173] 		tree block key (2573968 c
350503) level 0
Aug  1 21:33:40 backup2 kernel: [  435.686181] 		shared block backref parent
1317994450944
Aug  1 21:33:40 backup2 kernel: [  435.686189] 	item 41 key (615016013824 a8
4096) itemoff 2924 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.686198] 		extent refs 1 gen 44855 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.686205] 		tree block key (4866 60 611)
level 0
Aug  1 21:33:40 backup2 kernel: [  435.686212] 		shared block backref parent
1316577009664
Aug  1 21:33:40 backup2 kernel: [  435.686220] 	item 42 key (615016017920 a8
4096) itemoff 2873 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.686229] 		extent refs 1 gen 44855 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.686236] 		tree block key (4883 54
2375128439) level 0
Aug  1 21:33:40 backup2 kernel: [  435.686243] 		shared block backref parent
1317896613888
Aug  1 21:33:40 backup2 kernel: [  435.686249] 	item 43 key (615016022016 a8
4096) itemoff 2822 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.885308] 		extent refs 1 gen 44855 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.885315] 		tree block key (4883 54
3035664173) level 0
Aug  1 21:33:40 backup2 kernel: [  435.885323] 		shared block backref parent
1317896613888
Aug  1 21:33:40 backup2 kernel: [  435.885330] 	item 44 key (615016026112 a8
4096) itemoff 2771 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.885336] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.885344] 		tree block key (615015206912 a8
4096) level 0
Aug  1 21:33:40 backup2 kernel: [  435.885350] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.885355] 	item 45 key (615016030208 a8
4096) itemoff 2720 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.885363] 		extent refs 1 gen 44855 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.885368] 		tree block key (4883 54
3707954297) level 0
Aug  1 21:33:40 backup2 kernel: [  435.885373] 		shared block backref parent
1317896613888
Aug  1 21:33:40 backup2 kernel: [  435.885381] 	item 46 key (615016034304 a8
4096) itemoff 2669 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.885388] 		extent refs 1 gen 44855 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.885393] 		tree block key (1831133 6c 0)
level 0
Aug  1 21:33:40 backup2 kernel: [  435.885398] 		shared block backref parent
1349895577600
Aug  1 21:33:40 backup2 kernel: [  435.885406] 	item 47 key (615016038400 a8
4096) itemoff 2618 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.885412] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.885417] 		tree block key (632228835328 a8
4096) level 1
Aug  1 21:33:40 backup2 kernel: [  435.885424] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.885429] 	item 48 key (615016042496 a8
4096) itemoff 2567 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.885435] 		extent refs 1 gen 110424 flags
2
Aug  1 21:33:40 backup2 kernel: [  435.885440] 		tree block key (632230457344 a8
4096) level 0
Aug  1 21:33:40 backup2 kernel: [  435.885447] 		tree block backref root 2
Aug  1 21:33:40 backup2 kernel: [  435.885453] 	item 49 key (615016046592 a8
4096) itemoff 2516 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.885459] 		extent refs 1 gen 44855 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.885466] 		tree block key (350585 54
3006241221) level 0
Aug  1 21:33:40 backup2 kernel: [  435.885471] 		shared block backref parent
1316754350080
Aug  1 21:33:40 backup2 kernel: [  435.885477] 	item 50 key (615016050688 a8
4096) itemoff 2465 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.885485] 		extent refs 1 gen 44855 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.885491] 		tree block key (4883 54
1070372513) level 0
Aug  1 21:33:40 backup2 kernel: [  435.885496] 		shared block backref parent
1317896613888
Aug  1 21:33:40 backup2 kernel: [  435.885503] 	item 51 key (615016054784 a8
4096) itemoff 2414 itemsize 51
Aug  1 21:33:40 backup2 kernel: [  435.885510] 		extent refs 1 gen 44855 flags
258
Aug  1 21:33:40 backup2 kernel: [  435.885515] 		tree block key (350585 54
1403681717) level 0
Aug  1 21:33:40 backup2 kernel: [  435.885520] 		shared block backref parent
1313931538432
Aug  1 21:33:40 backup2 kernel: [  435.885525] ------------[ cut here
]------------
Aug  1 21:33:40 backup2 kernel: [  435.885542] WARNING: at
fs/btrfs/extent-tree.c:5022 __btrfs_free_extent+0x2a9/0x5cf [btrfs]()
Aug  1 21:33:40 backup2 kernel: [  435.885552] Modules linked in: xt_LOG
nf_conntrack_ipv4 nf_defrag_ipv4 ipv6 xt_state btrfs nf_conntrack
Aug  1 21:33:40 backup2 kernel: [  435.885571] Pid: 1651, comm: btrfs-transacti
Tainted: G        WC   2.6.44.7-dae-xen #2
Aug  1 21:33:40 backup2 kernel: [  435.885580] Call Trace:
Aug  1 21:33:40 backup2 kernel: [  435.885587]  [<ffffffff8103c7cf>] ?
warn_slowpath_common+0x76/0x8a
Aug  1 21:33:40 backup2 kernel: [  435.885604]  [<ffffffffa002ab4e>] ?
__btrfs_free_extent+0x2a9/0x5cf [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885614]  [<ffffffff81097be5>] ?
__set_page_dirty_nobuffers+0xc4/0xe0
Aug  1 21:33:40 backup2 kernel: [  435.885635]  [<ffffffffa006fae5>] ?
arch_spin_is_locked+0x5/0x8 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885653]  [<ffffffffa002e09c>] ?
run_clustered_refs+0x72b/0x7c2 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885669]  [<ffffffffa00233f9>] ?
comp_keys+0x26/0x2b [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885685]  [<ffffffffa0027010>] ?
spin_unlock+0x5/0x8 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885703]  [<ffffffffa002e34c>] ?
btrfs_run_delayed_refs+0x219/0x318 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885723]  [<ffffffffa0031e08>] ?
btrfs_update_root+0xc6/0xdb [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885740]  [<ffffffffa007f8cd>] ?
commit_cowonly_roots+0x24/0x199 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885760]  [<ffffffffa00768fa>] ?
spin_unlock+0x5/0x8 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885781]  [<ffffffffa003bc34>] ?
btrfs_commit_transaction+0x434/0x875 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885791]  [<ffffffff8106e5f7>] ?
arch_local_irq_restore+0x7/0x8
Aug  1 21:33:40 backup2 kernel: [  435.885799]  [<ffffffff81051c0e>] ?
abort_exclusive_wait+0x79/0x79
Aug  1 21:33:40 backup2 kernel: [  435.885818]  [<ffffffffa003b1e2>] ?
join_transaction.isra.28+0x283/0x291 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885841]  [<ffffffffa003c4be>] ?
start_transaction+0x1f4/0x24b [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885862]  [<ffffffffa0035e9e>] ?
transaction_kthread+0x17a/0x22e [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885882]  [<ffffffffa0035d24>] ?
try_to_freeze+0x2c/0x2c [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.885889]  [<ffffffff8105173a>] ?
kthread+0x7d/0x85
Aug  1 21:33:40 backup2 kernel: [  435.885896]  [<ffffffff81305c64>] ?
kernel_thread_helper+0x4/0x10
Aug  1 21:33:40 backup2 kernel: [  435.885904]  [<ffffffff813041b8>] ?
retint_restore_args+0x5/0x6
Aug  1 21:33:40 backup2 kernel: [  435.885911]  [<ffffffff81305c60>] ?
gs_change+0x13/0x13
Aug  1 21:33:40 backup2 kernel: [  435.885916] ---[ end trace d5809b3a28fe4bdc
]---
Aug  1 21:33:40 backup2 kernel: [  435.885922] btrfs unable to find ref byte nr
615015964672 parent 0 root 1  owner 0 offset 0
Aug  1 21:33:40 backup2 kernel: [  435.885937] ------------[ cut here
]------------
Aug  1 21:33:40 backup2 kernel: [  435.885942] kernel BUG at
fs/btrfs/extent-tree.c:5038!
Aug  1 21:33:40 backup2 kernel: [  435.885947] invalid opcode: 0000 [#1] SMP
Aug  1 21:33:40 backup2 kernel: [  435.885953] CPU 0
Aug  1 21:33:40 backup2 kernel: [  435.885955] Modules linked in: xt_LOG
nf_conntrack_ipv4 nf_defrag_ipv4 ipv6 xt_state btrfs nf_conntrack
Aug  1 21:33:40 backup2 kernel: [  435.885970]
Aug  1 21:33:40 backup2 kernel: [  435.885975] Pid: 1651, comm: btrfs-transacti
Tainted: G        WC   2.6.44.7-dae-xen #2
Aug  1 21:33:40 backup2 kernel: [  435.885984] RIP:
e030:[<ffffffffa002ab97>]  [<ffffffffa002ab97>]
__btrfs_free_extent+0x2f2/0x5cf [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.886002] RSP: e02b:ffff880172689ae0 
EFLAGS: 00010297
Aug  1 21:33:40 backup2 kernel: [  435.886008] RAX: 0000000000000000 RBX:
ffff88017554f1b0 RCX: ffff880176ef7000
Aug  1 21:33:40 backup2 kernel: [  435.886014] RDX: 0000000000000000 RSI:
000000000000007a RDI: ffff88017555cc18
Aug  1 21:33:40 backup2 kernel: [  435.886021] RBP: 0000000000000000 R08:
0000000000000000 R09: ffff880172689aa8
Aug  1 21:33:40 backup2 kernel: [  435.886027] R10: 0000000000000000 R11:
0000000000000004 R12: ffff88017555cc18
Aug  1 21:33:40 backup2 kernel: [  435.886033] R13: 0000000000000000 R14:
00000000fffffffe R15: 0000008f31cee000
Aug  1 21:33:40 backup2 kernel: [  435.886044] FS:  00007f0f2e59b700(0000)
GS:ffff88017fc00000(0000) knlGS:0000000000000000
Aug  1 21:33:40 backup2 kernel: [  435.886052] CS:  e033 DS: 0000 ES: 0000 CR0:
000000008005003b
Aug  1 21:33:40 backup2 kernel: [  435.886057] CR2: 00007fe614c28940 CR3:
0000000171c15000 CR4: 0000000000002660
Aug  1 21:33:40 backup2 kernel: [  435.886064] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Aug  1 21:33:40 backup2 kernel: [  435.886070] DR3: 0000000000000000 DR6:
00000000ffff0ff0 DR7: 0000000000000400
Aug  1 21:33:40 backup2 kernel: [  435.886077] Process btrfs-transacti (pid:
1651, threadinfo ffff880172688000, task ffff880178092c30)
Aug  1 21:33:40 backup2 kernel: [  435.886084] Stack:
Aug  1 21:33:40 backup2 kernel: [  435.889275]  0000000000000000
0000000000000001 0000000000000000 0000000000000000
Aug  1 21:33:40 backup2 kernel: [  435.889275]  ffff880100000000
ffffffff81097be5 0000000000000033 ffff8801776ddc00
Aug  1 21:33:40 backup2 kernel: [  435.889275]  ffff88016d0c4000
ffffea0005d553c0 0000000000001000 0000000000000024
Aug  1 21:33:40 backup2 kernel: [  435.889275] Call Trace:
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff81097be5>] ?
__set_page_dirty_nobuffers+0xc4/0xe0
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa006fae5>] ?
arch_spin_is_locked+0x5/0x8 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa002e09c>] ?
run_clustered_refs+0x72b/0x7c2 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa00233f9>] ?
comp_keys+0x26/0x2b [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa0027010>] ?
spin_unlock+0x5/0x8 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa002e34c>] ?
btrfs_run_delayed_refs+0x219/0x318 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa0031e08>] ?
btrfs_update_root+0xc6/0xdb [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa007f8cd>] ?
commit_cowonly_roots+0x24/0x199 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa00768fa>] ?
spin_unlock+0x5/0x8 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa003bc34>] ?
btrfs_commit_transaction+0x434/0x875 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff8106e5f7>] ?
arch_local_irq_restore+0x7/0x8
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff81051c0e>] ?
abort_exclusive_wait+0x79/0x79
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa003b1e2>] ?
join_transaction.isra.28+0x283/0x291 [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa003c4be>] ?
start_transaction+0x1f4/0x24b [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa0035e9e>] ?
transaction_kthread+0x17a/0x22e [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa0035d24>] ?
try_to_freeze+0x2c/0x2c [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff8105173a>] ?
kthread+0x7d/0x85
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff81305c64>] ?
kernel_thread_helper+0x4/0x10
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff813041b8>] ?
retint_restore_args+0x5/0x6
Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff81305c60>] ?
gs_change+0x13/0x13
Aug  1 21:33:40 backup2 kernel: [  435.889275] Code: 31 ed 31 ed e8 47 3d 2d e1
4c 8b 23 89 ee 4c 89 e7 e8 19 cd ff ff 83 f8 17 89 c2 0f 87 cb 00 00 00 45 85 ed
75 05 3b 6b 40 74 02 <0f> 0b 48 8b 8c 24 d0 00 00 00 45 31 c0 48 89 da 48
8b 74 24 38
Aug  1 21:33:40 backup2 kernel: [  435.889275] RIP  [<ffffffffa002ab97>]
__btrfs_free_extent+0x2f2/0x5cf [btrfs]
Aug  1 21:33:40 backup2 kernel: [  435.889275]  RSP <ffff880172689ae0>
Aug  1 21:33:40 backup2 kernel: [  436.085626] ---[ end trace d5809b3a28fe4bdd
]---
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David Sterba

2012-Aug-02 13:22 UTC

head link

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

On Wed, Aug 01, 2012 at 09:48:15PM +0200, Olivier Bonvalet
wrote:> I have some trouble with a btrfs filesystem.
> As you can see in logs, there is lines which are from btrfs (I
> supposed), then some warnings at fs/btrfs/extent-tree.c, and finally a
> "kernel BUG" at fs/btrfs/extent-tree.c:5038.
Did you really see this BUG ? It comes from some unused and disabled code:

5036 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
5037         if (item_size < sizeof(*ei)) {
5038                 BUG_ON(found_extent || extent_slot != path->slots[0]);
^^^^

5039                 ret = convert_extent_item_v0(trans, extent_root, path,
5040                                              owner_objectid, 0);
5041                 if (ret < 0)
5042                         goto abort;
5043
5044                 btrfs_release_path(path);
5045                 path->leave_spinning = 1;
5046
5047                 key.objectid = bytenr;
5048                 key.type = BTRFS_EXTENT_ITEM_KEY;
5049                 key.offset = num_bytes;
5050
5051                 ret = btrfs_search_slot(trans, extent_root, &key, path,
5052                                         -1, 1);
5053                 if (ret) {
5054                         printk(KERN_ERR "umm, got %d back from
search"
5055                                ", was looking for %llu\n", ret,
5056                                (unsigned long long)bytenr);
5057                         btrfs_print_leaf(extent_root, path->nodes[0]);
5058                 }
5059                 if (ret < 0)
5060                         goto abort;
5061                 extent_slot = path->slots[0];
5062                 leaf = path->nodes[0];
5063                 item_size = btrfs_item_size_nr(leaf, extent_slot);
5064         }
5065 #endif


david
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Olivier Bonvalet

2012-Aug-02 13:41 UTC

head link

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

On 02/08/2012 15:22, David Sterba wrote:> On Wed, Aug 01, 2012 at 09:48:15PM +0200, Olivier Bonvalet wrote:
>> I have some trouble with a btrfs filesystem.
>> As you can see in logs, there is lines which are from btrfs (I
>> supposed), then some warnings at fs/btrfs/extent-tree.c, and finally a
>> "kernel BUG" at fs/btrfs/extent-tree.c:5038.
>
> Did you really see this BUG ? It comes from some unused and disabled code:
>
> 5036 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
> 5037         if (item_size<  sizeof(*ei)) {
> 5038                 BUG_ON(found_extent || extent_slot !=
path->slots[0]);
> ^^^^
>
> 5039                 ret = convert_extent_item_v0(trans, extent_root, path,
> 5040                                              owner_objectid, 0);
> 5041                 if (ret<  0)
> 5042                         goto abort;
> 5043
> 5044                 btrfs_release_path(path);
> 5045                 path->leave_spinning = 1;
> 5046
> 5047                 key.objectid = bytenr;
> 5048                 key.type = BTRFS_EXTENT_ITEM_KEY;
> 5049                 key.offset = num_bytes;
> 5050
> 5051                 ret = btrfs_search_slot(trans, extent_root,&key,
path,
> 5052                                         -1, 1);
> 5053                 if (ret) {
> 5054                         printk(KERN_ERR "umm, got %d back from
search"
> 5055                                ", was looking for %llu\n",
ret,
> 5056                                (unsigned long long)bytenr);
> 5057                         btrfs_print_leaf(extent_root,
path->nodes[0]);
> 5058                 }
> 5059                 if (ret<  0)
> 5060                         goto abort;
> 5061                 extent_slot = path->slots[0];
> 5062                 leaf = path->nodes[0];
> 5063                 item_size = btrfs_item_size_nr(leaf, extent_slot);
> 5064         }
> 5065 #endif
>
>
> david
>
Yes... it''s a copy from my /var/log/kern.log. Is it really
"disabled" ?
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David Sterba

2012-Aug-02 13:53 UTC

head link

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

On Thu, Aug 02, 2012 at 03:41:03PM +0200, Olivier Bonvalet
wrote:> Yes... it''s a copy from my /var/log/kern.log. Is it really
"disabled" ?
I was mistaken, it really is enabled unconditionally in ctree.h:55.
Josef says that the V0 extent refs are not used for a long time, so the
question is how did they appear in your filesystem. Did you switch to a
new kernel from a very old one?


david
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Olivier Bonvalet

2012-Aug-02 16:18 UTC

head link

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

On 02/08/2012 15:53, David Sterba wrote:> On Thu, Aug 02, 2012 at 03:41:03PM +0200, Olivier Bonvalet wrote:
>> Yes... it''s a copy from my /var/log/kern.log. Is it really
"disabled" ?
>
> I was mistaken, it really is enabled unconditionally in ctree.h:55.
> Josef says that the V0 extent refs are not used for a long time, so the
> question is how did they appear in your filesystem. Did you switch to a
> new kernel from a very old one?
>
>
> david
> --
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>
mmm I have upgraded that system every two months, but the first setup is 
from april 2011 I think.

Should I start a "scrub" on all that systems installed a long time ago
?
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Olivier Bonvalet

2012-Aug-03 22:41 UTC

head link

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

On 02/08/2012 18:18, Olivier Bonvalet wrote:> On 02/08/2012 15:53, David Sterba wrote:
>> On Thu, Aug 02, 2012 at 03:41:03PM +0200, Olivier Bonvalet wrote:
>>> Yes... it''s a copy from my /var/log/kern.log. Is it really
"disabled" ?
>>
>> I was mistaken, it really is enabled unconditionally in ctree.h:55.
>> Josef says that the V0 extent refs are not used for a long time, so the
>> question is how did they appear in your filesystem. Did you switch to a
>> new kernel from a very old one?
>>
>>
>> david
>> -- 
>> 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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>>
> 
> mmm I have upgraded that system every two months, but the first setup is
from april 2011 I think.
> 
> Should I start a "scrub" on all that systems installed a long
time ago ?
> -- 
> To unsubscribe from this list: send the line "unsubscribe
linux-btrfs" in
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> 
So after a hard reboot that filesystem is not mountable anymore :

Aug  4 00:40:06 backup2 kernel: [  614.826124] device fsid
a5dfe512-c8a3-46f0-bc8c-6365b8eccdcb devid 1 transid 110423
/dev/mapper/vg--backupplug-backup
Aug  4 00:40:06 backup2 kernel: [  614.827934] btrfs: force zlib compression
Aug  4 00:40:06 backup2 kernel: [  614.827943] btrfs: not using ssd allocation
scheme
Aug  4 00:40:06 backup2 kernel: [  614.827950] btrfs: enabling auto
recoveryparent transid verify failed on 615015833600 wanted 110423 found 110424
Aug  4 00:40:06 backup2 kernel: [  614.933613] parent transid verify failed on
615015833600 wanted 110423 found 110424
Aug  4 00:40:06 backup2 kernel: [  614.934700] btrfs read error corrected: ino 1
off 615015833600 (dev /dev/mapper/vg--backupplug-backup sector 1209083504)
Aug  4 00:40:06 backup2 kernel: [  614.934716] Failed to read block groups: -5
Aug  4 00:40:07 backup2 kernel: [  614.952684] btrfs: open_ctree failed


Is there something I can do to fix that ? (the mount option "recovery"
didn''t help here)

thanks,

Olivier
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Olivier Bonvalet

2012-Aug-03 23:30 UTC

head link

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

On 04/08/2012 00:41, Olivier Bonvalet wrote:> On 02/08/2012 18:18, Olivier Bonvalet wrote:
>> On 02/08/2012 15:53, David Sterba wrote:
>>> On Thu, Aug 02, 2012 at 03:41:03PM +0200, Olivier Bonvalet wrote:
>>>> Yes... it''s a copy from my /var/log/kern.log. Is it
really "disabled" ?
>>>
>>> I was mistaken, it really is enabled unconditionally in ctree.h:55.
>>> Josef says that the V0 extent refs are not used for a long time, so
the
>>> question is how did they appear in your filesystem. Did you switch
to a
>>> new kernel from a very old one?
>>>
>>>
>>> david
>>> -- 
>>> To unsubscribe from this list: send the line "unsubscribe
linux-btrfs" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>
>>
>> mmm I have upgraded that system every two months, but the first setup
is from april 2011 I think.
>>
>> Should I start a "scrub" on all that systems installed a long
time ago ?
>> -- 
>> To unsubscribe from this list: send the line "unsubscribe
linux-btrfs" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
> 
> So after a hard reboot that filesystem is not mountable anymore :
> 
> Aug  4 00:40:06 backup2 kernel: [  614.826124] device fsid
a5dfe512-c8a3-46f0-bc8c-6365b8eccdcb devid 1 transid 110423
/dev/mapper/vg--backupplug-backup
> Aug  4 00:40:06 backup2 kernel: [  614.827934] btrfs: force zlib
compression
> Aug  4 00:40:06 backup2 kernel: [  614.827943] btrfs: not using ssd
allocation scheme
> Aug  4 00:40:06 backup2 kernel: [  614.827950] btrfs: enabling auto
recoveryparent transid verify failed on 615015833600 wanted 110423 found 110424
> Aug  4 00:40:06 backup2 kernel: [  614.933613] parent transid verify failed
on 615015833600 wanted 110423 found 110424
> Aug  4 00:40:06 backup2 kernel: [  614.934700] btrfs read error corrected:
ino 1 off 615015833600 (dev /dev/mapper/vg--backupplug-backup sector 1209083504)
> Aug  4 00:40:06 backup2 kernel: [  614.934716] Failed to read block groups:
-5
> Aug  4 00:40:07 backup2 kernel: [  614.952684] btrfs: open_ctree failed
> 
> 
> Is there something I can do to fix that ? (the mount option
"recovery" didn''t help here)
> 
> thanks,
> 
> Olivier
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> 

and btrfsck doesn''t help :

# btrfsck /dev/vg-backupplug/backup
parent transid verify failed on 615015833600 wanted 110423 found 110424
Ignoring transid failure
checking extents
Extent back ref already exists for 615015841792 parent 0 root 2
bad block 615015841792
parent transid verify failed on 615015833600 wanted 110423 found 110424
Ignoring transid failure
parent transid verify failed on 615015833600 wanted 110423 found 110424
Ignoring transid failure
[...]
parent transid verify failed on 615015866368 wanted 110423 found 110424
Ignoring transid failure
leaf parent key incorrect 615015849984
bad block 615015849984
leaf parent key incorrect 615015858176
bad block 615015858176
parent transid verify failed on 615015833600 wanted 110423 found 110424
Ignoring transid failure
[...]
parent transid verify failed on 615015866368 wanted 110423 found 110424
Ignoring transid failure
leaf parent key incorrect 615015866368
bad block 615015866368
parent transid verify failed on 615015833600 wanted 110423 found 110424
Ignoring transid failure
btrfsck: disk-io.c:441: find_and_setup_root: Assertion `!(ret)'' failed.
Abandon
#

Data can be restored thanks to btrfs-restore tool ; but is there really no way
to fix the filesystem ?
(I also tried btrfs-zero-log)

Olivier
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Chris Samuel

2012-Aug-05 08:57 UTC

head link

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

On 08/04/2012 08:41 AM, Olivier Bonvalet wrote:
> Is there something I can do to fix that ? (the mount
> option "recovery" didn''t help here)
I''ve seen someone (perhaps Marc Merlin) report that the
3.5.x kernel was able to mount a filesystem that 3.4.x
couldn''t, so it might be worth a shot here!

Best of luck,
Chris
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Olivier Bonvalet

2012-Aug-05 14:11 UTC

head link

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

On 05/08/2012 10:57, Chris Samuel wrote:> On 08/04/2012 08:41 AM, Olivier Bonvalet wrote:
> 
>> Is there something I can do to fix that ? (the mount
>> option "recovery" didn''t help here)
> 
> I''ve seen someone (perhaps Marc Merlin) report that the
> 3.5.x kernel was able to mount a filesystem that 3.4.x
> couldn''t, so it might be worth a shot here!
> 
> Best of luck,
> Chris
Thanks for the idea, but same result :

Aug  5 16:10:12 backup2 kernel: [   58.630481] device fsid
a5dfe512-c8a3-46f0-bc8c-6365b8eccdcb devid 1 transid 110425
/dev/mapper/vg--backupplug-backup
Aug  5 16:10:12 backup2 kernel: [   58.631346] btrfs: force zlib compression
Aug  5 16:10:12 backup2 kernel: [   58.631357] btrfs: not using ssd allocation
scheme
Aug  5 16:10:12 backup2 kernel: [   58.631366] btrfs: enabling auto recovery
Aug  5 16:10:12 backup2 kernel: [   58.670972] btrfs: no dev_stats entry found
for device /dev/mapper/vg--backupplug-backup (devid 1) (OK on first mount after
mkfs)
Aug  5 16:10:12 backup2 kernel: [   58.674758] parent transid verify failed on
615015833600 wanted 110423 found 110424
Aug  5 16:10:12 backup2 kernel: [   58.675090] parent transid verify failed on
615015833600 wanted 110423 found 110424
Aug  5 16:10:12 backup2 kernel: [   58.675523] btrfs read error corrected: ino 1
off 615015833600 (dev /dev/mapper/vg--backupplug-backup sector 1209083504)
Aug  5 16:10:12 backup2 kernel: [   58.675536] Failed to read block groups: -5
Aug  5 16:10:12 backup2 kernel: [   58.704720] btrfs: open_ctree failed
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David Sterba

2012-Aug-08 14:45 UTC

head link

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

On Sun, Aug 05, 2012 at 04:11:47PM +0200, Olivier Bonvalet
wrote:> On 05/08/2012 10:57, Chris Samuel wrote:
> > On 08/04/2012 08:41 AM, Olivier Bonvalet wrote:
> > 
> >> Is there something I can do to fix that ? (the mount
> >> option "recovery" didn''t help here)
> > 
> > I''ve seen someone (perhaps Marc Merlin) report that the
> > 3.5.x kernel was able to mount a filesystem that 3.4.x
> > couldn''t, so it might be worth a shot here!
> 
> Thanks for the idea, but same result :
> 
> Aug  5 16:10:12 backup2 kernel: [   58.630481] device fsid
a5dfe512-c8a3-46f0-bc8c-6365b8eccdcb devid 1 transid 110425
/dev/mapper/vg--backupplug-backup
> Aug  5 16:10:12 backup2 kernel: [   58.631346] btrfs: force zlib
compression
> Aug  5 16:10:12 backup2 kernel: [   58.631357] btrfs: not using ssd
allocation scheme
> Aug  5 16:10:12 backup2 kernel: [   58.631366] btrfs: enabling auto
recovery
> Aug  5 16:10:12 backup2 kernel: [   58.670972] btrfs: no dev_stats entry
found for device /dev/mapper/vg--backupplug-backup (devid 1) (OK on first mount
after mkfs)
> Aug  5 16:10:12 backup2 kernel: [   58.674758] parent transid verify failed
on 615015833600 wanted 110423 found 110424
> Aug  5 16:10:12 backup2 kernel: [   58.675090] parent transid verify failed
on 615015833600 wanted 110423 found 110424
> Aug  5 16:10:12 backup2 kernel: [   58.675523] btrfs read error corrected:
ino 1 off 615015833600 (dev /dev/mapper/vg--backupplug-backup sector 1209083504)
This looks strange, the the corrupted block belongs to metadata, I
assume you have the DUP profile, so there is a good copy that can be
used instead, the error message confirms that, but ...
> Aug  5 16:10:12 backup2 kernel: [   58.675536] Failed to read block groups:
-5
... ? -5 means EIO, which is returned when a block cannot be read, so
unless there''s a different reason for it, this looks like a missed
oportunity to fix an error and continue.

The same error messages are present in the logs from 3.4 version.
> Aug  5 16:10:12 backup2 kernel: [   58.704720] btrfs: open_ctree failed--
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Stefan Behrens

2012-Aug-08 16:06 UTC

head link

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

On Wed, 8 Aug 2012 16:45:57 +0200, David Sterba wrote:> On Sun, Aug 05, 2012 at 04:11:47PM +0200, Olivier Bonvalet wrote:
>> Aug  5 16:10:12 backup2 kernel: [   58.674758] parent transid verify
failed on 615015833600 wanted 110423 found 110424
1st mirror fails verify_parent_transid().
>> Aug  5 16:10:12 backup2 kernel: [   58.675090] parent transid verify
failed on 615015833600 wanted 110423 found 110424
2nd mirror fails verify_parent_transid().
>> Aug  5 16:10:12 backup2 kernel: [   58.675523] btrfs read error
corrected: ino 1 off 615015833600 (dev /dev/mapper/vg--backupplug-backup sector
1209083504)
That''s a bug. It is wrong to ignore the previous results from
verify_parent_transid() and to call repair_eb_io_failure() which
rewrites one mirror and claims to have corrected an error. But it''s not
a major issue, just a misleading message in the kernel log and a disk
write operation which does not repair anything.
> This looks strange, the the corrupted block belongs to metadata, I
> assume you have the DUP profile, so there is a good copy that can be
> used instead, the error message confirms that, but ...
> 
>> Aug  5 16:10:12 backup2 kernel: [   58.675536] Failed to read block
groups: -5
That''s correct, because the UPTODATE flag in the extent is not set
(verify_parent_transid() clears it when it detects an error).
> ... ? -5 means EIO, which is returned when a block cannot be read, so
> unless there''s a different reason for it, this looks like a missed
> oportunity to fix an error and continue.
> 
> The same error messages are present in the logs from 3.4 version.
> 
>> Aug  5 16:10:12 backup2 kernel: [   58.704720] btrfs: open_ctree failed
The summary is that the block was not correctable, both mirrors had the
same old transid. The bug is that the call to repair_io_failure() should
not have been done because verify_parent_transid() indicated errors.

I''ll prepare a patch for it. Changing btree_read_extent_buffer_pages()
to set ret to -EIO if verify_parent_transid() fails should fix the issue.
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Olivier Bonvalet

2012-Aug-27 08:49 UTC

head link

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

Note that this FS still be unmountable with last "for-linus" branch.

Aug 27 10:47:33 backup2 kernel: [987464.600465] device fsid 
a5dfe512-c8a3-46f0-bc8c-6365b8eccdcb devid 1 transid 110425 
/dev/mapper/vg--backupplug-backup
Aug 27 10:47:33 backup2 kernel: [987464.601701] btrfs: force zlib 
compression
Aug 27 10:47:33 backup2 kernel: [987464.601709] btrfs: not using ssd 
allocation scheme
Aug 27 10:47:33 backup2 kernel: [987464.691331] parent transid verify 
failed on 615015833600 wanted 110423 found 110424
Aug 27 10:47:33 backup2 kernel: [987464.699658] parent transid verify 
failed on 615015833600 wanted 110423 found 110424
Aug 27 10:47:33 backup2 kernel: [987464.700093] btrfs read error 
corrected: ino 1 off 615015833600 (dev /dev/mapper/vg--backupplug-backup 
sector 1209083504)
Aug 27 10:47:33 backup2 kernel: [987464.700107] Failed to read block 
groups: -5
Aug 27 10:47:33 backup2 kernel: [987464.720816] btrfs: open_ctree failed




On 01/08/2012 21:48, Olivier Bonvalet wrote:> Hi,
>
> I have some trouble with a btrfs filesystem.
> As you can see in logs, there is lines which are from btrfs (I supposed),
then some warnings at fs/btrfs/extent-tree.c, and finally a "kernel
BUG" at fs/btrfs/extent-tree.c:5038.
>
> Do you need more informations ?
>
>
> Aug  1 21:23:10 backup2 kernel: [    7.015184] Btrfs loaded
> Aug  1 21:23:10 backup2 kernel: [    7.023314] device fsid
a5dfe512-c8a3-46f0-bc8c-6365b8eccdcb devid 1 transid 110423
/dev/mapper/vg--backupplug-backup
> Aug  1 21:23:10 backup2 kernel: [    7.024405] btrfs: force zlib
compression
> Aug  1 21:23:10 backup2 kernel: [    7.024414] btrfs: not using ssd
allocation scheme
> Aug  1 21:23:10 backup2 kernel: [   17.938241] NET: Registered protocol
family 10
> Aug  1 21:26:53 backup2 kernel: [   28.880027] eth0: no IPv6 routers
present
> Aug  1 21:33:39 backup2 kernel: [  435.285128] leaf 615015878656 total ptrs
28 free space 1651
> Aug  1 21:33:39 backup2 kernel: [  435.285146] 	item 0 key (642867957760 a8
4096) itemoff 3944 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285153] 		extent refs 1 gen 108436
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285162] 		tree block key
(18446744073709551606 80 1215799304192) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285171] 		tree block backref root 7
> Aug  1 21:33:39 backup2 kernel: [  435.285179] 	item 1 key (642867970048 a8
4096) itemoff 3893 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285186] 		extent refs 1 gen 38936
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285196] 		tree block key (401571 54
2912287038) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285202] 		shared block backref
parent 615081041920
> Aug  1 21:33:39 backup2 kernel: [  435.285208] 	item 2 key (642867994624 a8
4096) itemoff 3824 itemsize 69
> Aug  1 21:33:39 backup2 kernel: [  435.285214] 		extent refs 3 gen 38909
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285221] 		tree block key (13092 c
12250) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285226] 		shared block backref
parent 1306797543424
> Aug  1 21:33:39 backup2 kernel: [  435.285231] 		shared block backref
parent 1306797494272
> Aug  1 21:33:39 backup2 kernel: [  435.285236] 		shared block backref
parent 647007399936
> Aug  1 21:33:39 backup2 kernel: [  435.285242] 	item 3 key (642868002816 a8
4096) itemoff 3773 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285248] 		extent refs 1 gen 44304
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285255] 		tree block key
(1824364519424 a8 94208) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285260] 		tree block backref root 2
> Aug  1 21:33:39 backup2 kernel: [  435.285265] 	item 4 key (642868006912 a8
4096) itemoff 3722 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285271] 		extent refs 1 gen 44304
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285278] 		tree block key
(1824369225728 a8 118784) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285284] 		tree block backref root 2
> Aug  1 21:33:39 backup2 kernel: [  435.285289] 	item 5 key (642868011008 a8
4096) itemoff 3671 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285295] 		extent refs 1 gen 101712
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285302] 		tree block key (833 6c
162816000) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285307] 		shared block backref
parent 617940144128
> Aug  1 21:33:39 backup2 kernel: [  435.285313] 	item 6 key (642868015104 a8
4096) itemoff 3593 itemsize 78
> Aug  1 21:33:39 backup2 kernel: [  435.285321] 		extent refs 4 gen 38909
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285326] 		tree block key (17721 60
119) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285331] 		shared block backref
parent 1314062098432
> Aug  1 21:33:39 backup2 kernel: [  435.285336] 		shared block backref
parent 1314062094336
> Aug  1 21:33:39 backup2 kernel: [  435.285341] 		shared block backref
parent 1312740683776
> Aug  1 21:33:39 backup2 kernel: [  435.285348] 		shared block backref
parent 1312740675584
> Aug  1 21:33:39 backup2 kernel: [  435.285354] 	item 7 key (642868019200 a8
4096) itemoff 3542 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285360] 		extent refs 1 gen 44307
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285365] 		tree block key
(18446744073709551606 80 1825532395520) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285373] 		tree block backref root 7
> Aug  1 21:33:39 backup2 kernel: [  435.285378] 	item 8 key (642868023296 a8
4096) itemoff 3491 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285384] 		extent refs 1 gen 101712
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285389] 		tree block key (833 6c
161284096) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285396] 		shared block backref
parent 617940144128
> Aug  1 21:33:39 backup2 kernel: [  435.285402] 	item 9 key (642868027392 a8
4096) itemoff 3440 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285408] 		extent refs 1 gen 106320
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285416] 		tree block key (708 6c
4009984) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285421] 		shared block backref
parent 643144060928
> Aug  1 21:33:39 backup2 kernel: [  435.285426] 	item 10 key (642868031488
a8 4096) itemoff 3389 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285433] 		extent refs 1 gen 101179
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285440] 		tree block key (554 6c
45199360) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285445] 		shared block backref
parent 644377743360
> Aug  1 21:33:39 backup2 kernel: [  435.285450] 	item 11 key (642868035584
a8 4096) itemoff 3338 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285458] 		extent refs 1 gen 109814
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285464] 		tree block key
(1393123659776 a8 118784) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285469] 		tree block backref root 2
> Aug  1 21:33:39 backup2 kernel: [  435.285474] 	item 12 key (642868043776
a8 4096) itemoff 3287 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285480] 		extent refs 1 gen 109814
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285487] 		tree block key
(1393124843520 b8 618853261312) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285493] 		tree block backref root 2
> Aug  1 21:33:39 backup2 kernel: [  435.285498] 	item 13 key (642868056064
a8 4096) itemoff 3236 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285506] 		extent refs 1 gen 109232
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285511] 		tree block key
(1299755941888 a8 16384) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285516] 		tree block backref root 2
> Aug  1 21:33:39 backup2 kernel: [  435.285521] 	item 14 key (642868060160
a8 4096) itemoff 3185 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285527] 		extent refs 1 gen 44304
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285532] 		tree block key
(1824360902656 a8 81920) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285538] 		tree block backref root 2
> Aug  1 21:33:39 backup2 kernel: [  435.285543] 	item 15 key (642868064256
a8 4096) itemoff 3134 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285550] 		extent refs 1 gen 107019
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285556] 		tree block key
(18446744073709551606 80 1362292793344) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285562] 		tree block backref root 7
> Aug  1 21:33:39 backup2 kernel: [  435.285567] 	item 16 key (642868068352
a8 4096) itemoff 3065 itemsize 69
> Aug  1 21:33:39 backup2 kernel: [  435.285573] 		extent refs 3 gen 38909
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285579] 		tree block key (13089 c
12249) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285585] 		shared block backref
parent 1306797543424
> Aug  1 21:33:39 backup2 kernel: [  435.285592] 		shared block backref
parent 1306797494272
> Aug  1 21:33:39 backup2 kernel: [  435.285597] 		shared block backref
parent 647007399936
> Aug  1 21:33:39 backup2 kernel: [  435.285603] 	item 17 key (642868072448
a8 4096) itemoff 3014 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285609] 		extent refs 1 gen 107019
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285614] 		tree block key
(18446744073709551606 80 1362289672192) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285623] 		tree block backref root 7
> Aug  1 21:33:39 backup2 kernel: [  435.285628] 	item 18 key (642868076544
a8 4096) itemoff 2945 itemsize 69
> Aug  1 21:33:39 backup2 kernel: [  435.285634] 		extent refs 3 gen 97165
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285639] 		tree block key (3262 54
2184751459) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285649] 		shared block backref
parent 646044622848
> Aug  1 21:33:39 backup2 kernel: [  435.285654] 		shared block backref
parent 644201959424
> Aug  1 21:33:39 backup2 kernel: [  435.285659] 		shared block backref
parent 642867171328
> Aug  1 21:33:39 backup2 kernel: [  435.285664] 	item 19 key (642868080640
a8 4096) itemoff 2876 itemsize 69
> Aug  1 21:33:39 backup2 kernel: [  435.285673] 		extent refs 3 gen 38909
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285678] 		tree block key (13113 6c
0) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285685] 		shared block backref
parent 1306797543424
> Aug  1 21:33:39 backup2 kernel: [  435.285692] 		shared block backref
parent 1306797494272
> Aug  1 21:33:39 backup2 kernel: [  435.285697] 		shared block backref
parent 647007399936
> Aug  1 21:33:39 backup2 kernel: [  435.285703] 	item 20 key (642868084736
a8 4096) itemoff 2726 itemsize 150
> Aug  1 21:33:39 backup2 kernel: [  435.285710] 		extent refs 12 gen 97165
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285717] 		tree block key (3262 54
2256339809) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285722] 		tree block backref root
2698
> Aug  1 21:33:39 backup2 kernel: [  435.285726] 		shared block backref
parent 646044622848
> Aug  1 21:33:39 backup2 kernel: [  435.285733] 		shared block backref
parent 645667573760
> Aug  1 21:33:39 backup2 kernel: [  435.285738] 		shared block backref
parent 645339078656
> Aug  1 21:33:39 backup2 kernel: [  435.285743] 		shared block backref
parent 644201959424
> Aug  1 21:33:39 backup2 kernel: [  435.285748] 		shared block backref
parent 643792703488
> Aug  1 21:33:39 backup2 kernel: [  435.285753] 		shared block backref
parent 643459452928
> Aug  1 21:33:39 backup2 kernel: [  435.285759] 		shared block backref
parent 643412889600
> Aug  1 21:33:39 backup2 kernel: [  435.285764] 		shared block backref
parent 642959036416
> Aug  1 21:33:39 backup2 kernel: [  435.285769] 		shared block backref
parent 642867171328
> Aug  1 21:33:39 backup2 kernel: [  435.285774] 		shared block backref
parent 642865500160
> Aug  1 21:33:39 backup2 kernel: [  435.285781] 		shared block backref
parent 618298048512
> Aug  1 21:33:39 backup2 kernel: [  435.285787] 	item 21 key (642868088832
a8 4096) itemoff 2675 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285793] 		extent refs 1 gen 38909
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285798] 		tree block key (1788 54
2201505456) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285805] 		shared block backref
parent 615111450624
> Aug  1 21:33:39 backup2 kernel: [  435.285811] 	item 22 key (642868092928
a8 4096) itemoff 2606 itemsize 69
> Aug  1 21:33:39 backup2 kernel: [  435.285817] 		extent refs 3 gen 38909
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285822] 		tree block key (13116 c
12250) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285827] 		shared block backref
parent 1306797543424
> Aug  1 21:33:39 backup2 kernel: [  435.285834] 		shared block backref
parent 1306797494272
> Aug  1 21:33:39 backup2 kernel: [  435.285839] 		shared block backref
parent 647007399936
> Aug  1 21:33:39 backup2 kernel: [  435.285845] 	item 23 key (642868097024
a8 4096) itemoff 2555 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285853] 		extent refs 1 gen 109232
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285864] 		tree block key
(1299832553472 a8 8192) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285871] 		tree block backref root 2
> Aug  1 21:33:39 backup2 kernel: [  435.285877] 	item 24 key (642868101120
a8 4096) itemoff 2504 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285885] 		extent refs 1 gen 102767
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285893] 		tree block key
(18446744073709551606 80 1488237449216) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285899] 		tree block backref root 7
> Aug  1 21:33:39 backup2 kernel: [  435.285904] 	item 25 key (642868105216
a8 4096) itemoff 2453 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285912] 		extent refs 1 gen 109232
flags 2
> Aug  1 21:33:39 backup2 kernel: [  435.285917] 		tree block key
(1299832934400 a8 4096) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285923] 		tree block backref root 2
> Aug  1 21:33:39 backup2 kernel: [  435.285927] 	item 26 key (642868109312
a8 4096) itemoff 2402 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285935] 		extent refs 1 gen 101712
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285941] 		tree block key (833 6c
164655104) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285946] 		shared block backref
parent 617940144128
> Aug  1 21:33:39 backup2 kernel: [  435.285951] 	item 27 key (642868113408
a8 4096) itemoff 2351 itemsize 51
> Aug  1 21:33:39 backup2 kernel: [  435.285957] 		extent refs 1 gen 101712
flags 258
> Aug  1 21:33:39 backup2 kernel: [  435.285962] 		tree block key (833 6c
168382464) level 0
> Aug  1 21:33:39 backup2 kernel: [  435.285967] 		shared block backref
parent 617940144128
> Aug  1 21:33:39 backup2 kernel: [  435.285972] ------------[ cut here
]------------
> Aug  1 21:33:39 backup2 kernel: [  435.285994] WARNING: at
fs/btrfs/extent-tree.c:5022 __btrfs_free_extent+0x2a9/0x5cf [btrfs]()
> Aug  1 21:33:39 backup2 kernel: [  435.286002] Modules linked in: xt_LOG
nf_conntrack_ipv4 nf_defrag_ipv4 ipv6 xt_state btrfs nf_conntrack
> Aug  1 21:33:39 backup2 kernel: [  435.286019] Pid: 1651, comm:
btrfs-transacti Tainted: G         C   2.6.44.7-dae-xen #2
> Aug  1 21:33:39 backup2 kernel: [  435.286026] Call Trace:
> Aug  1 21:33:39 backup2 kernel: [  435.286035]  [<ffffffff8103c7cf>]
? warn_slowpath_common+0x76/0x8a
> Aug  1 21:33:39 backup2 kernel: [  435.286049]  [<ffffffffa002ab4e>]
? __btrfs_free_extent+0x2a9/0x5cf [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.286058]  [<ffffffff813007dc>]
? __slab_free+0xd7/0x271
> Aug  1 21:33:39 backup2 kernel: [  435.286077]  [<ffffffffa006fae5>]
? arch_spin_is_locked+0x5/0x8 [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.286093]  [<ffffffffa002e09c>]
? run_clustered_refs+0x72b/0x7c2 [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.286108]  [<ffffffffa0027010>]
? spin_unlock+0x5/0x8 [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.286123]  [<ffffffffa002e34c>]
? btrfs_run_delayed_refs+0x219/0x318 [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.286144]  [<ffffffffa0077cda>]
? btrfs_run_delayed_items+0x106/0x12b [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.286153]  [<ffffffff8106e62f>]
? do_raw_spin_unlock+0x5/0x8
> Aug  1 21:33:39 backup2 kernel: [  435.286160]  [<ffffffff8106e5f7>]
? arch_local_irq_restore+0x7/0x8
> Aug  1 21:33:39 backup2 kernel: [  435.286178]  [<ffffffffa003bbb5>]
? btrfs_commit_transaction+0x3b5/0x875 [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.286187]  [<ffffffff8106e5f7>]
? arch_local_irq_restore+0x7/0x8
> Aug  1 21:33:39 backup2 kernel: [  435.286195]  [<ffffffff81051c0e>]
? abort_exclusive_wait+0x79/0x79
> Aug  1 21:33:39 backup2 kernel: [  435.286213]  [<ffffffffa003b1e2>]
? join_transaction.isra.28+0x283/0x291 [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.286233]  [<ffffffffa003c4be>]
? start_transaction+0x1f4/0x24b [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.286250]  [<ffffffffa0035e9e>]
? transaction_kthread+0x17a/0x22e [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.485313]  [<ffffffffa0035d24>]
? try_to_freeze+0x2c/0x2c [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.485331]  [<ffffffff8105173a>]
? kthread+0x7d/0x85
> Aug  1 21:33:39 backup2 kernel: [  435.485342]  [<ffffffff81305c64>]
? kernel_thread_helper+0x4/0x10
> Aug  1 21:33:39 backup2 kernel: [  435.485353]  [<ffffffff813041b8>]
? retint_restore_args+0x5/0x6
> Aug  1 21:33:39 backup2 kernel: [  435.485362]  [<ffffffff81305c60>]
? gs_change+0x13/0x13
> Aug  1 21:33:39 backup2 kernel: [  435.485371] ---[ end trace
d5809b3a28fe4bda ]---
> Aug  1 21:33:39 backup2 kernel: [  435.485382] btrfs unable to find ref
byte nr 642867965952 parent 0 root 5  owner 1 offset 0
> Aug  1 21:33:39 backup2 kernel: [  435.485395] ------------[ cut here
]------------
> Aug  1 21:33:39 backup2 kernel: [  435.485412] WARNING: at
fs/btrfs/extent-tree.c:5073 __btrfs_free_extent+0x40f/0x5cf [btrfs]()
> Aug  1 21:33:39 backup2 kernel: [  435.485423] Modules linked in: xt_LOG
nf_conntrack_ipv4 nf_defrag_ipv4 ipv6 xt_state btrfs nf_conntrack
> Aug  1 21:33:39 backup2 kernel: [  435.485451] Pid: 1651, comm:
btrfs-transacti Tainted: G        WC   2.6.44.7-dae-xen #2
> Aug  1 21:33:39 backup2 kernel: [  435.485461] Call Trace:
> Aug  1 21:33:39 backup2 kernel: [  435.485470]  [<ffffffff8103c7cf>]
? warn_slowpath_common+0x76/0x8a
> Aug  1 21:33:39 backup2 kernel: [  435.485488]  [<ffffffffa002acb4>]
? __btrfs_free_extent+0x40f/0x5cf [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.485500]  [<ffffffff813007dc>]
? __slab_free+0xd7/0x271
> Aug  1 21:33:39 backup2 kernel: [  435.485523]  [<ffffffffa006fae5>]
? arch_spin_is_locked+0x5/0x8 [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.485542]  [<ffffffffa002e09c>]
? run_clustered_refs+0x72b/0x7c2 [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.485561]  [<ffffffffa0027010>]
? spin_unlock+0x5/0x8 [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.485581]  [<ffffffffa002e34c>]
? btrfs_run_delayed_refs+0x219/0x318 [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.485606]  [<ffffffffa0077cda>]
? btrfs_run_delayed_items+0x106/0x12b [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.485618]  [<ffffffff8106e62f>]
? do_raw_spin_unlock+0x5/0x8
> Aug  1 21:33:39 backup2 kernel: [  435.485630]  [<ffffffff8106e5f7>]
? arch_local_irq_restore+0x7/0x8
> Aug  1 21:33:39 backup2 kernel: [  435.485653]  [<ffffffffa003bbb5>]
? btrfs_commit_transaction+0x3b5/0x875 [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.485665]  [<ffffffff8106e5f7>]
? arch_local_irq_restore+0x7/0x8
> Aug  1 21:33:39 backup2 kernel: [  435.485675]  [<ffffffff81051c0e>]
? abort_exclusive_wait+0x79/0x79
> Aug  1 21:33:39 backup2 kernel: [  435.485699]  [<ffffffffa003b1e2>]
? join_transaction.isra.28+0x283/0x291 [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.485724]  [<ffffffffa003c4be>]
? start_transaction+0x1f4/0x24b [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.485747]  [<ffffffffa0035e9e>]
? transaction_kthread+0x17a/0x22e [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.485770]  [<ffffffffa0035d24>]
? try_to_freeze+0x2c/0x2c [btrfs]
> Aug  1 21:33:39 backup2 kernel: [  435.485782]  [<ffffffff8105173a>]
? kthread+0x7d/0x85
> Aug  1 21:33:39 backup2 kernel: [  435.485788]  [<ffffffff81305c64>]
? kernel_thread_helper+0x4/0x10
> Aug  1 21:33:39 backup2 kernel: [  435.485796]  [<ffffffff813041b8>]
? retint_restore_args+0x5/0x6
> Aug  1 21:33:39 backup2 kernel: [  435.485805]  [<ffffffff81305c60>]
? gs_change+0x13/0x13
> Aug  1 21:33:39 backup2 kernel: [  435.485813] ---[ end trace
d5809b3a28fe4bdb ]---
> Aug  1 21:33:39 backup2 kernel: [  435.488037] parent transid verify failed
on 615015964672 wanted 110423 found 110424
> Aug  1 21:33:40 backup2 kernel: [  435.520841] btrfs read error corrected:
ino 1 off 615015964672 (dev /dev/mapper/vg--backupplug-backup sector 1209083760)
> Aug  1 21:33:40 backup2 kernel: [  435.520896] leaf 615015903232 total ptrs
52 free space 1114
> Aug  1 21:33:40 backup2 kernel: [  435.520904] 	item 0 key (615015927808 b6
615143944192) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.520910] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.520915] 	item 1 key (615015927808 b6
615143989248) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.520922] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.520926] 	item 2 key (615015927808 b6
618017591296) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.520933] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.520937] 	item 3 key (615015927808 b6
618393165824) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.520944] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.520949] 	item 4 key (615015927808 b6
618466762752) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.520955] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.520960] 	item 5 key (615015927808 b6
618605518848) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.520966] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.520971] 	item 6 key (615015927808 b6
632293793792) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.520977] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.520982] 	item 7 key (615015927808 b6
632419733504) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.520989] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.520993] 	item 8 key (615015927808 b6
632459755520) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.521000] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.521005] 	item 9 key (615015927808 b6
642169331712) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.521011] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.521016] 	item 10 key (615015927808
b6 642706571264) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.521022] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.521027] 	item 11 key (615015927808
b6 643082162176) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.521033] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.521038] 	item 12 key (615015927808
b6 644046438400) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.521044] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.521049] 	item 13 key (615015927808
b6 644105711616) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.521055] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.521060] 	item 14 key (615015927808
b6 645157392384) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.521067] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.521071] 	item 15 key (615015927808
b6 645949968384) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.521078] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.521082] 	item 16 key (615015927808
b6 646083702784) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.685205] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.685219] 	item 17 key (615015927808
b6 647496245248) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.685236] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.685247] 	item 18 key (615015927808
b6 647586762752) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.685264] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.685274] 	item 19 key (615015927808
b6 1312669048832) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.685291] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.685301] 	item 20 key (615015927808
b6 1350289035264) itemoff 3995 itemsize 0
> Aug  1 21:33:40 backup2 kernel: [  435.685318] 		shared block backref
> Aug  1 21:33:40 backup2 kernel: [  435.685329] 	item 21 key (615015931904
a8 4096) itemoff 3944 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685345] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.685356] 		tree block key
(632346750976 a8 4096) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.685370] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.685380] 	item 22 key (615015936000
a8 4096) itemoff 3893 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685397] 		extent refs 1 gen 44855
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.685408] 		tree block key (350585 54
3891015556) level 1
> Aug  1 21:33:40 backup2 kernel: [  435.685423] 		shared block backref
parent 1312623005696
> Aug  1 21:33:40 backup2 kernel: [  435.685435] 	item 23 key (615015940096
a8 4096) itemoff 3842 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685451] 		extent refs 1 gen 44855
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.685462] 		tree block key (350585 54
3892699538) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.685476] 		shared block backref
parent 615015936000
> Aug  1 21:33:40 backup2 kernel: [  435.685489] 	item 24 key (615015944192
a8 4096) itemoff 3791 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685505] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.685516] 		tree block key
(632346931200 a8 4096) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.685526] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.685536] 	item 25 key (615015948288
a8 4096) itemoff 3740 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685553] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.685564] 		tree block key
(632347131904 a8 4096) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.685578] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.685586] 	item 26 key (615015952384
a8 4096) itemoff 3689 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685598] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.685609] 		tree block key
(632348577792 a8 4096) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.685618] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.685626] 	item 27 key (615015956480
a8 4096) itemoff 3638 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685639] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.685648] 		tree block key
(632349069312 a8 4096) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.685659] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.685667] 	item 28 key (615015960576
a8 4096) itemoff 3587 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685677] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.685688] 		tree block key
(615015415808 a8 4096) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.685696] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.685704] 	item 29 key (615015964672
a8 4096) itemoff 3536 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685717] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.685726] 		tree block key
(632218943488 a8 4096) level 1
> Aug  1 21:33:40 backup2 kernel: [  435.685734] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.685745] 	item 30 key (615015968768
a8 4096) itemoff 3485 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685755] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.685763] 		tree block key
(632227590144 a8 4096) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.685775] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.685784] 	item 31 key (615015972864
a8 4096) itemoff 3434 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685800] 		extent refs 1 gen 44855
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.685811] 		tree block key (66190 54
758361044) level 1
> Aug  1 21:33:40 backup2 kernel: [  435.685826] 		shared block backref
parent 1317943054336
> Aug  1 21:33:40 backup2 kernel: [  435.685838] 	item 32 key (615015976960
a8 4096) itemoff 3383 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685854] 		extent refs 1 gen 44855
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.685864] 		tree block key (66190 54
2794591185) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.685876] 		shared block backref
parent 615015972864
> Aug  1 21:33:40 backup2 kernel: [  435.685891] 	item 33 key (615015981056
a8 4096) itemoff 3332 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685904] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.685918] 		tree block key
(632262762496 a8 4096) level 1
> Aug  1 21:33:40 backup2 kernel: [  435.685929] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.685942] 	item 34 key (615015985152
a8 4096) itemoff 3281 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.685955] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.685969] 		tree block key
(632271273984 a8 4096) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.685981] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.685994] 	item 35 key (615015989248
a8 4096) itemoff 3230 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.686007] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.686018] 		tree block key
(632289968128 a8 4096) level 1
> Aug  1 21:33:40 backup2 kernel: [  435.686027] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.686034] 	item 36 key (615015993344
a8 4096) itemoff 3179 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.686042] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.686050] 		tree block key
(632301543424 b6 645726699520) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.686058] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.686065] 	item 37 key (615015997440
a8 4096) itemoff 3128 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.686074] 		extent refs 1 gen 68796
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.686081] 		tree block key (1448 54
1555482842) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.686088] 		shared block backref
parent 642470191104
> Aug  1 21:33:40 backup2 kernel: [  435.686096] 	item 38 key (615016001536
a8 4096) itemoff 3077 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.686105] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.686113] 		tree block key
(632302252032 a8 4096) level 1
> Aug  1 21:33:40 backup2 kernel: [  435.686120] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.686127] 	item 39 key (615016005632
a8 4096) itemoff 3026 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.686136] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.686143] 		tree block key
(632302252032 a8 4096) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.686150] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.686157] 	item 40 key (615016009728
a8 4096) itemoff 2975 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.686166] 		extent refs 1 gen 44855
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.686173] 		tree block key (2573968 c
350503) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.686181] 		shared block backref
parent 1317994450944
> Aug  1 21:33:40 backup2 kernel: [  435.686189] 	item 41 key (615016013824
a8 4096) itemoff 2924 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.686198] 		extent refs 1 gen 44855
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.686205] 		tree block key (4866 60
611) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.686212] 		shared block backref
parent 1316577009664
> Aug  1 21:33:40 backup2 kernel: [  435.686220] 	item 42 key (615016017920
a8 4096) itemoff 2873 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.686229] 		extent refs 1 gen 44855
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.686236] 		tree block key (4883 54
2375128439) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.686243] 		shared block backref
parent 1317896613888
> Aug  1 21:33:40 backup2 kernel: [  435.686249] 	item 43 key (615016022016
a8 4096) itemoff 2822 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.885308] 		extent refs 1 gen 44855
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.885315] 		tree block key (4883 54
3035664173) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.885323] 		shared block backref
parent 1317896613888
> Aug  1 21:33:40 backup2 kernel: [  435.885330] 	item 44 key (615016026112
a8 4096) itemoff 2771 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.885336] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.885344] 		tree block key
(615015206912 a8 4096) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.885350] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.885355] 	item 45 key (615016030208
a8 4096) itemoff 2720 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.885363] 		extent refs 1 gen 44855
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.885368] 		tree block key (4883 54
3707954297) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.885373] 		shared block backref
parent 1317896613888
> Aug  1 21:33:40 backup2 kernel: [  435.885381] 	item 46 key (615016034304
a8 4096) itemoff 2669 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.885388] 		extent refs 1 gen 44855
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.885393] 		tree block key (1831133 6c
0) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.885398] 		shared block backref
parent 1349895577600
> Aug  1 21:33:40 backup2 kernel: [  435.885406] 	item 47 key (615016038400
a8 4096) itemoff 2618 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.885412] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.885417] 		tree block key
(632228835328 a8 4096) level 1
> Aug  1 21:33:40 backup2 kernel: [  435.885424] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.885429] 	item 48 key (615016042496
a8 4096) itemoff 2567 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.885435] 		extent refs 1 gen 110424
flags 2
> Aug  1 21:33:40 backup2 kernel: [  435.885440] 		tree block key
(632230457344 a8 4096) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.885447] 		tree block backref root 2
> Aug  1 21:33:40 backup2 kernel: [  435.885453] 	item 49 key (615016046592
a8 4096) itemoff 2516 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.885459] 		extent refs 1 gen 44855
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.885466] 		tree block key (350585 54
3006241221) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.885471] 		shared block backref
parent 1316754350080
> Aug  1 21:33:40 backup2 kernel: [  435.885477] 	item 50 key (615016050688
a8 4096) itemoff 2465 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.885485] 		extent refs 1 gen 44855
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.885491] 		tree block key (4883 54
1070372513) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.885496] 		shared block backref
parent 1317896613888
> Aug  1 21:33:40 backup2 kernel: [  435.885503] 	item 51 key (615016054784
a8 4096) itemoff 2414 itemsize 51
> Aug  1 21:33:40 backup2 kernel: [  435.885510] 		extent refs 1 gen 44855
flags 258
> Aug  1 21:33:40 backup2 kernel: [  435.885515] 		tree block key (350585 54
1403681717) level 0
> Aug  1 21:33:40 backup2 kernel: [  435.885520] 		shared block backref
parent 1313931538432
> Aug  1 21:33:40 backup2 kernel: [  435.885525] ------------[ cut here
]------------
> Aug  1 21:33:40 backup2 kernel: [  435.885542] WARNING: at
fs/btrfs/extent-tree.c:5022 __btrfs_free_extent+0x2a9/0x5cf [btrfs]()
> Aug  1 21:33:40 backup2 kernel: [  435.885552] Modules linked in: xt_LOG
nf_conntrack_ipv4 nf_defrag_ipv4 ipv6 xt_state btrfs nf_conntrack
> Aug  1 21:33:40 backup2 kernel: [  435.885571] Pid: 1651, comm:
btrfs-transacti Tainted: G        WC   2.6.44.7-dae-xen #2
> Aug  1 21:33:40 backup2 kernel: [  435.885580] Call Trace:
> Aug  1 21:33:40 backup2 kernel: [  435.885587]  [<ffffffff8103c7cf>]
? warn_slowpath_common+0x76/0x8a
> Aug  1 21:33:40 backup2 kernel: [  435.885604]  [<ffffffffa002ab4e>]
? __btrfs_free_extent+0x2a9/0x5cf [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885614]  [<ffffffff81097be5>]
? __set_page_dirty_nobuffers+0xc4/0xe0
> Aug  1 21:33:40 backup2 kernel: [  435.885635]  [<ffffffffa006fae5>]
? arch_spin_is_locked+0x5/0x8 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885653]  [<ffffffffa002e09c>]
? run_clustered_refs+0x72b/0x7c2 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885669]  [<ffffffffa00233f9>]
? comp_keys+0x26/0x2b [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885685]  [<ffffffffa0027010>]
? spin_unlock+0x5/0x8 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885703]  [<ffffffffa002e34c>]
? btrfs_run_delayed_refs+0x219/0x318 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885723]  [<ffffffffa0031e08>]
? btrfs_update_root+0xc6/0xdb [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885740]  [<ffffffffa007f8cd>]
? commit_cowonly_roots+0x24/0x199 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885760]  [<ffffffffa00768fa>]
? spin_unlock+0x5/0x8 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885781]  [<ffffffffa003bc34>]
? btrfs_commit_transaction+0x434/0x875 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885791]  [<ffffffff8106e5f7>]
? arch_local_irq_restore+0x7/0x8
> Aug  1 21:33:40 backup2 kernel: [  435.885799]  [<ffffffff81051c0e>]
? abort_exclusive_wait+0x79/0x79
> Aug  1 21:33:40 backup2 kernel: [  435.885818]  [<ffffffffa003b1e2>]
? join_transaction.isra.28+0x283/0x291 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885841]  [<ffffffffa003c4be>]
? start_transaction+0x1f4/0x24b [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885862]  [<ffffffffa0035e9e>]
? transaction_kthread+0x17a/0x22e [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885882]  [<ffffffffa0035d24>]
? try_to_freeze+0x2c/0x2c [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.885889]  [<ffffffff8105173a>]
? kthread+0x7d/0x85
> Aug  1 21:33:40 backup2 kernel: [  435.885896]  [<ffffffff81305c64>]
? kernel_thread_helper+0x4/0x10
> Aug  1 21:33:40 backup2 kernel: [  435.885904]  [<ffffffff813041b8>]
? retint_restore_args+0x5/0x6
> Aug  1 21:33:40 backup2 kernel: [  435.885911]  [<ffffffff81305c60>]
? gs_change+0x13/0x13
> Aug  1 21:33:40 backup2 kernel: [  435.885916] ---[ end trace
d5809b3a28fe4bdc ]---
> Aug  1 21:33:40 backup2 kernel: [  435.885922] btrfs unable to find ref
byte nr 615015964672 parent 0 root 1  owner 0 offset 0
> Aug  1 21:33:40 backup2 kernel: [  435.885937] ------------[ cut here
]------------
> Aug  1 21:33:40 backup2 kernel: [  435.885942] kernel BUG at
fs/btrfs/extent-tree.c:5038!
> Aug  1 21:33:40 backup2 kernel: [  435.885947] invalid opcode: 0000 [#1]
SMP
> Aug  1 21:33:40 backup2 kernel: [  435.885953] CPU 0
> Aug  1 21:33:40 backup2 kernel: [  435.885955] Modules linked in: xt_LOG
nf_conntrack_ipv4 nf_defrag_ipv4 ipv6 xt_state btrfs nf_conntrack
> Aug  1 21:33:40 backup2 kernel: [  435.885970]
> Aug  1 21:33:40 backup2 kernel: [  435.885975] Pid: 1651, comm:
btrfs-transacti Tainted: G        WC   2.6.44.7-dae-xen #2
> Aug  1 21:33:40 backup2 kernel: [  435.885984] RIP:
e030:[<ffffffffa002ab97>]  [<ffffffffa002ab97>]
__btrfs_free_extent+0x2f2/0x5cf [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.886002] RSP: e02b:ffff880172689ae0 
EFLAGS: 00010297
> Aug  1 21:33:40 backup2 kernel: [  435.886008] RAX: 0000000000000000 RBX:
ffff88017554f1b0 RCX: ffff880176ef7000
> Aug  1 21:33:40 backup2 kernel: [  435.886014] RDX: 0000000000000000 RSI:
000000000000007a RDI: ffff88017555cc18
> Aug  1 21:33:40 backup2 kernel: [  435.886021] RBP: 0000000000000000 R08:
0000000000000000 R09: ffff880172689aa8
> Aug  1 21:33:40 backup2 kernel: [  435.886027] R10: 0000000000000000 R11:
0000000000000004 R12: ffff88017555cc18
> Aug  1 21:33:40 backup2 kernel: [  435.886033] R13: 0000000000000000 R14:
00000000fffffffe R15: 0000008f31cee000
> Aug  1 21:33:40 backup2 kernel: [  435.886044] FS:  00007f0f2e59b700(0000)
GS:ffff88017fc00000(0000) knlGS:0000000000000000
> Aug  1 21:33:40 backup2 kernel: [  435.886052] CS:  e033 DS: 0000 ES: 0000
CR0: 000000008005003b
> Aug  1 21:33:40 backup2 kernel: [  435.886057] CR2: 00007fe614c28940 CR3:
0000000171c15000 CR4: 0000000000002660
> Aug  1 21:33:40 backup2 kernel: [  435.886064] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
> Aug  1 21:33:40 backup2 kernel: [  435.886070] DR3: 0000000000000000 DR6:
00000000ffff0ff0 DR7: 0000000000000400
> Aug  1 21:33:40 backup2 kernel: [  435.886077] Process btrfs-transacti
(pid: 1651, threadinfo ffff880172688000, task ffff880178092c30)
> Aug  1 21:33:40 backup2 kernel: [  435.886084] Stack:
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  0000000000000000
0000000000000001 0000000000000000 0000000000000000
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  ffff880100000000
ffffffff81097be5 0000000000000033 ffff8801776ddc00
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  ffff88016d0c4000
ffffea0005d553c0 0000000000001000 0000000000000024
> Aug  1 21:33:40 backup2 kernel: [  435.889275] Call Trace:
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff81097be5>]
? __set_page_dirty_nobuffers+0xc4/0xe0
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa006fae5>]
? arch_spin_is_locked+0x5/0x8 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa002e09c>]
? run_clustered_refs+0x72b/0x7c2 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa00233f9>]
? comp_keys+0x26/0x2b [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa0027010>]
? spin_unlock+0x5/0x8 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa002e34c>]
? btrfs_run_delayed_refs+0x219/0x318 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa0031e08>]
? btrfs_update_root+0xc6/0xdb [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa007f8cd>]
? commit_cowonly_roots+0x24/0x199 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa00768fa>]
? spin_unlock+0x5/0x8 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa003bc34>]
? btrfs_commit_transaction+0x434/0x875 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff8106e5f7>]
? arch_local_irq_restore+0x7/0x8
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff81051c0e>]
? abort_exclusive_wait+0x79/0x79
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa003b1e2>]
? join_transaction.isra.28+0x283/0x291 [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa003c4be>]
? start_transaction+0x1f4/0x24b [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa0035e9e>]
? transaction_kthread+0x17a/0x22e [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffffa0035d24>]
? try_to_freeze+0x2c/0x2c [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff8105173a>]
? kthread+0x7d/0x85
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff81305c64>]
? kernel_thread_helper+0x4/0x10
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff813041b8>]
? retint_restore_args+0x5/0x6
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  [<ffffffff81305c60>]
? gs_change+0x13/0x13
> Aug  1 21:33:40 backup2 kernel: [  435.889275] Code: 31 ed 31 ed e8 47 3d
2d e1 4c 8b 23 89 ee 4c 89 e7 e8 19 cd ff ff 83 f8 17 89 c2 0f 87 cb 00 00 00 45
85 ed 75 05 3b 6b 40 74 02<0f>  0b 48 8b 8c 24 d0 00 00 00 45 31 c0 48 89
da 48 8b 74 24 38
> Aug  1 21:33:40 backup2 kernel: [  435.889275] RIP 
[<ffffffffa002ab97>] __btrfs_free_extent+0x2f2/0x5cf [btrfs]
> Aug  1 21:33:40 backup2 kernel: [  435.889275]  RSP<ffff880172689ae0>
> Aug  1 21:33:40 backup2 kernel: [  436.085626] ---[ end trace
d5809b3a28fe4bdd ]---
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Btrfs devel - Aug 2012 - kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)

Re: kernel BUG at fs/btrfs/extent-tree.c:5038 (linux 3.4.7)