I've just got this bug in the latest 2.6.34-rc3-00388 kernel.
I wasn't doing anything fancy, just doing some 'git log' in a small wmaker
repo I have here. After I got this bug the cpu went to 100% and I had to
reboot with the button because the laptop was not responding to any commands
(but the mouse was moving and X seemed ok)
I have the full dmesg (64 KB) which I can upload somewhere if needed. But
for now I just would like to know if this bug is known to people in the list.
[ 8150.547096] ------------[ cut here ]------------
[ 8150.547101] kernel BUG at /home/mafra/linux-2.6/fs/btrfs/volumes.c:2828!
[ 8150.547103] invalid opcode: 0000 [#1] SMP
[ 8150.547107] last sysfs file:
/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
[ 8150.547109] CPU 1
[ 8150.547111] Modules linked in: ppp_deflate ppp_async ppp_generic slhc option
usbserial snd_seq snd_seq_device uvcvideo snd_hda_codec_idt snd_hda_in
tel iwlagn sky2 snd_hda_codec ehci_hcd snd_hwdep i2c_i801 evdev
[ 8150.547125]
[ 8150.547128] Pid: 1606, comm: btrfs-delalloc- Not tainted
2.6.34-rc3-00388-gf5284e7 #48 VAIO/VGN-FZ240E
[ 8150.547131] RIP: 0010:[<ffffffff811b39a9>] [<ffffffff811b39a9>]
btrfs_rmap_block+0x2c9/0x2d0
[ 8150.547139] RSP: 0018:ffff88007aeab7f0 EFLAGS: 00010246
[ 8150.547142] RAX: 0000000000000000 RBX: 0000000000010000 RCX: ffffffffffffffff
[ 8150.547144] RDX: 0000001e821d0000 RSI: 0000001e821d0000 RDI: ffff88007ef1fa28
[ 8150.547147] RBP: ffff88007aeab870 R08: 0000000000000000 R09: ffff88007aeab8a8
[ 8150.547149] R10: 0000000000000000 R11: ffff88005ae73580 R12: 0000000000000000
[ 8150.547151] R13: ffff88007ae9c0e8 R14: ffff88007aeab8ac R15: ffff88007aeab8a8
[ 8150.547154] FS: 0000000000000000(0000) GS:ffff880001b00000(0000)
knlGS:0000000000000000
[ 8150.547157] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 8150.547159] CR2: 00007f4adf3d9000 CR3: 0000000001812000 CR4: 00000000000006e0
[ 8150.547161] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 8150.547164] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 8150.547166] Process btrfs-delalloc- (pid: 1606, threadinfo ffff88007aeaa000,
task ffff88007f330280)
[ 8150.547168] Stack:
[ 8150.547170] 00000000000009b8 ffff880000000001 ffff88007acf7000
00ffffff811a0eb5
[ 8150.547173] <0> 0000000000000001 00002202400000cc ffff88007aeaa000
ffff88007aeab8a8
[ 8150.547178] <0> ffff88007aeab8a0 0000001e821d0000 ffff88007aeab860
ffff88007ae6fd80
[ 8150.547182] Call Trace:
[ 8150.547188] [<ffffffff8117bdb1>] exclude_super_stripes+0x61/0x110
[ 8150.547193] [<ffffffff8119dc30>] ? __tree_search+0x90/0x120
[ 8150.547196] [<ffffffff8117c906>] btrfs_make_block_group+0x136/0x320
[ 8150.547200] [<ffffffff811b6fd6>] __btrfs_alloc_chunk+0x616/0x740
[ 8150.547203] [<ffffffff811b716f>] btrfs_alloc_chunk+0x6f/0xa0
[ 8150.547207] [<ffffffff8117d546>] do_chunk_alloc+0x166/0x230
[ 8150.547210] [<ffffffff8117f7d9>] find_free_extent+0x939/0x9f0
[ 8150.547214] [<ffffffff8117fab5>] btrfs_reserve_extent+0xc5/0x1b0
[ 8150.547218] [<ffffffff814f3559>] ? mutex_lock+0x19/0x50
[ 8150.547227] [<ffffffff8119572d>] submit_compressed_extents+0x10d/0x3f0
[ 8150.547231] [<ffffffff81195a8f>] async_cow_submit+0x7f/0x90
[ 8150.547234] [<ffffffff811b80c6>] run_ordered_completions+0x76/0xe0
[ 8150.547237] [<ffffffff811b898a>] worker_loop+0x15a/0x580
[ 8150.547240] [<ffffffff811b8830>] ? worker_loop+0x0/0x580
[ 8150.547243] [<ffffffff8105b6ce>] kthread+0x8e/0xa0
[ 8150.547248] [<ffffffff81003ad4>] kernel_thread_helper+0x4/0x10
[ 8150.547250] [<ffffffff8105b640>] ? kthread+0x0/0xa0
[ 8150.547259] [<ffffffff81003ad0>] ? kernel_thread_helper+0x0/0x10
[ 8150.547261] Code: 00 00 48 c7 c7 68 ce 75 81 e8 34 ab e8 ff 4c 8b 5d 90 4c
8b 55 98 4c 8b 4d b0 48 8b 4d a0 48 8b 45 a8 e9 af fe ff ff 0f 0b eb fe
<0f> 0b eb fe 0f 1f 00 55 48 89 e5 41 55 49 89 d5 41 54 49 89 f4
[ 8150.547292] RIP [<ffffffff811b39a9>] btrfs_rmap_block+0x2c9/0x2d0
[ 8150.547296] RSP <ffff88007aeab7f0>
[ 8150.547310] ---[ end trace 6c5e0e4f829c2aeb ]---
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