https://bugzilla.novell.com/show_bug.cgi?id=761788
https://bugzilla.novell.com/show_bug.cgi?id=761788#c4
--- Comment #4 from David Sterba 2012-05-12 01:49:03 CEST ---
Did you see any btrfs related messages before the oops traces?
Similar to:
btrfs unable to find ref byte nr 2054466859008 parent 2054465597440 root 0
owner 0 offset 0
or
parent transid verify failed on 2054466859008 wanted 15349 found 175224
During a long snapshot deletion I saw this trace, mostly matches the one you
reported, but I see only a warning (and a different kernel from sle11 sp2, but
it's very close to the 3.1 based in opensuse):
[11642.248223] ------------[ cut here ]------------
[11642.248278] WARNING: at fs/btrfs/extent-tree.c:5040
__btrfs_free_extent+0x6a7/0x7a0 [btrfs]()
[11642.248531] Pid: 4712, comm: btrfs-cleaner Tainted: G N
3.0.30-default+ #35
[11642.248538] Call Trace:
[11642.248566] [<ffffffff810048b5>] dump_trace+0x75/0x300
[11642.248584] [<ffffffff8144062f>] dump_stack+0x69/0x6f
[11642.248600] [<ffffffff81059f3b>] warn_slowpath_common+0x7b/0xc0
[11642.248637] [<ffffffffa0565ef7>] __btrfs_free_extent+0x6a7/0x7a0 [btrfs]
[11642.248724] [<ffffffffa0566133>] run_delayed_tree_ref+0x143/0x150 [btrfs]
[11642.248798] [<ffffffffa056643e>] run_clustered_refs+0xce/0x320 [btrfs]
[11642.248871] [<ffffffffa05667c9>] btrfs_run_delayed_refs+0x139/0x2e0 [btrfs]
[11642.248948] [<ffffffffa0576484>] btrfs_commit_transaction+0xd4/0x8f0
[btrfs]
[11642.249040] [<ffffffffa0568c1c>] btrfs_drop_snapshot+0x25c/0x650 [btrfs]
[11642.249115] [<ffffffffa0574e2b>] btrfs_clean_one_old_snapshot+0x12b/0x160
[btrfs]
[11642.249205] [<ffffffffa05709f4>] cleaner_kthread+0x154/0x1e0 [btrfs]
[11642.249266] [<ffffffff8107b7b6>] kthread+0x96/0xa0
[11642.249278] [<ffffffff8144c544>] kernel_thread_helper+0x4/0x10
[11642.249287] ---[ end trace afeaa46b2c33a468 ]---
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