Public bug reported:
My netbook does not boot anymore. In recovery mode when I select to do a
fsck I get this kernel error message:
---SNIP---
[ 90.988538] ------------[ cut here ]------------
[ 90.988609] kernel BUG at
/build/buildd/linux-3.0.0/fs/btrfs/extent-tree.c:5510!
[ 90.988695] invalid opcode: 0000 [#1] SMP
[ 90.988812] Modules linked in: btrfs zlib_deflate libcrc32c i915
drm_kms_helper drm i2c_algo_bit r8169 video
[ 90.989194]
[ 90.989249] Pid: 284, comm: btrfs-transacti Not tainted 3.0.0-13-generic
#22-Ubuntu Dell Inc. Inspiron 1011/CN0Y53
[ 90.989432] EIP: 0060:[<f81d4a6e>] EFLAGS: 00010282 CPU: 1
[ 90.989522] EIP is at alloc_reserved_tree_block+0x1be/0x1f0 [btrfs]
[ 90.989588] EAX: ffffffef EBX: f4ff2150 ECX: 00000000 EDX: 00000008
[ 90.989654] ESI: f509c000 EDI: e4dd1000 EBP: f4ac5e08 ESP: f4ac5dc8
[ 90.989719] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 90.989784] Process btrfs-transacti (pid: 284, ti=f4ac4000 task=f4ae8cc0
task.ti=f4ac4000)
[ 90.989869] Stack:
[ 90.989922] f4ac5e5f f4ac5df8 00000001 a0000000 00000566 00000000 00000000
00000000
[ 90.990240] 00000000 f50d2000 e4dd1000 00000000 00000033 f491d3c0 f50d2000
e4dd1000
[ 90.990557] f4ac5e7c f81d5287 00000000 00000000 00000002 00000000 00000000
00000000
[ 90.990875] Call Trace:
[ 90.990958] [<f81d5287>] run_delayed_tree_ref+0xd7/0x220 [btrfs]
[ 90.991048] [<f81d8414>] run_one_delayed_ref+0xc4/0x120 [btrfs]
[ 90.991138] [<f81d8516>] run_clustered_refs+0xa6/0x1e0 [btrfs]
[ 90.991227] [<f81d8702>] btrfs_run_delayed_refs+0xb2/0x1d0 [btrfs]
[ 90.991299] [<c152c80d>] ? _raw_spin_lock+0xd/0x10
[ 90.991388] [<f81e8c96>] btrfs_commit_transaction+0x96/0x720 [btrfs]
[ 90.991481] [<f81e96c5>] ? start_transaction.part.22+0x65/0x270 [btrfs]
[ 90.991552] [<c1066320>] ? add_wait_queue+0x50/0x50
[ 90.991643] [<f81e9908>] ? start_transaction+0x38/0x50 [btrfs]
[ 90.991733] [<f81e24bd>] transaction_kthread+0x20d/0x220 [btrfs]
[ 90.991802] [<c102f9ce>] ? complete+0x4e/0x60
[ 90.991888] [<f81e22b0>] ? btrfs_congested_fn+0x90/0x90 [btrfs]
[ 90.991956] [<c1065b1d>] kthread+0x6d/0x80
[ 90.992011] [<c1065ab0>] ? flush_kthread_worker+0x80/0x80
[ 90.992011] [<c1533ebe>] kernel_thread_helper+0x6/0x10
[ 90.992011] Code: 5f 5d c3 66 90 89 fa 89 f0 b9 b0 00 00 00 e8 aa df 02 00
8b 45 10 8b 55 14 89 04 24 89 f0 89 54 24 04 89 fa e8 74 e1 02 00 eb 86 <0f> 0b
0f 0b 8b 4d 28 8b 41 09 8b 51 0d 89 44 24 0c 89 54 24 10
[ 90.992011] EIP: [<f81d4a6e>] alloc_reserved_tree_block+0x1be/0x1f0 [btrfs]
SS:ESP 0068:f4ac5dc8
[ 90.994568] ---[ end trace 733a0abd0ec10c9f ]---
---SNAP---
I have an etx3 /boot partition, a btrfs "/" partition with a subvolume
"@" and a btrfs "/home/" partition with a subvolume "@home" and AFAIR
"/dev/sda7" is "/".
Find attached the whole output of dmesg.
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/940171
Title:
kernel BUG at /build/buildd/linux-3.0.0/fs/btrfs/extent-tree.c:5510
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