Re: [Lsf-pc] [Topic] Bcache

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On Wed, Mar 14, 2012 at 01:24:08PM -0400, Kent Overstreet wrote:

[..]
> 
> Can you post the full log? There was a bug where if it encountered an
> error during registration, it wouldn't wait for a uuid read or write
> before tearing everything down - that's what your backtrace looks like
> to me.
> 
> You could try the bcache-3.2-dev branch, too. I have a newer branch
> with a ton of bugfixes but I'm waiting until it's seen more testing
> before I post it.

Faced the same issue on bcache-3.2-dev branch too.

login: [  167.532932] bio: create slab <bio-1> at 1
[  167.539071] bcache: invalidating existing data
[  167.547604] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC
[  167.548573] CPU 2 
[  167.548573] Modules linked in: floppy [last unloaded: scsi_wait_scan]
[  167.548573] 
[  167.548573] Pid: 0, comm: swapper/2 Not tainted 3.2.0-bcache+ #4
Hewlett-Packard HP xw6600 Workstation/0A9Ch
[  167.548573] RIP: 0010:[<ffffffff8144d6fe>]  [<ffffffff8144d6fe>]
closure_put+0xe/0x20
[  167.548573] RSP: 0018:ffff88013fc83c60  EFLAGS: 00010246
[  167.548573] RAX: 0000000000000000 RBX: ffff8801385b04a0 RCX:
0000000000000000
[  167.548573] RDX: 0000000000000000 RSI: 00000000ffffffff RDI:
6b6b6b6b6b6b6b6b
[  167.548573] RBP: ffff88013fc83c60 R08: 0000000000000000 R09:
0000000000000001
[  167.548573] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000000
[  167.548573] R13: ffff880137719580 R14: 0000000000080000 R15:
0000000000000000
[  167.548573] FS:  0000000000000000(0000) GS:ffff88013fc80000(0000)
knlGS:0000000000000000
[  167.548573] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  167.548573] CR2: 00007f6e84f70240 CR3: 000000013707d000 CR4:
00000000000006e0
[  167.548573] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[  167.548573] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[  167.548573] Process swapper/2 (pid: 0, threadinfo ffff88013a454000,
task ffff88013a458000)
[  167.548573] Stack:
[  167.548573]  ffff88013fc83c80 ffffffff814448c6 ffffffff00000000
ffff8801385b04a0
[  167.548573]  ffff88013fc83c90 ffffffff8117ae8d ffff88013fc83cc0
ffffffff812e2273
[  167.548573]  ffff88013a454000 0000000000000000 ffff8801385b04a0
0000000000080000
[  167.548573] Call Trace:
[  167.548573]  <IRQ> 
[  167.548573]  [<ffffffff814448c6>] uuid_endio+0x36/0x40
[  167.548573]  [<ffffffff8117ae8d>] bio_endio+0x1d/0x40
[  167.548573]  [<ffffffff812e2273>] req_bio_endio+0x83/0xc0
[  167.548573]  [<ffffffff812e53e1>] blk_update_request+0x101/0x5c0
[  167.548573]  [<ffffffff812e5612>] ? blk_update_request+0x332/0x5c0
[  167.548573]  [<ffffffff812e58d1>] blk_update_bidi_request+0x31/0x90
[  167.548573]  [<ffffffff812e595c>] blk_end_bidi_request+0x2c/0x80
[  167.548573]  [<ffffffff812e59f0>] blk_end_request+0x10/0x20
[  167.548573]  [<ffffffff81458fdc>] scsi_io_completion+0x9c/0x5f0
[  167.548573]  [<ffffffff8144fcd0>] scsi_finish_command+0xb0/0xe0
[  167.548573]  [<ffffffff81458dc5>] scsi_softirq_done+0xa5/0x140
[  167.548573]  [<ffffffff812ec55b>] blk_done_softirq+0x7b/0x90
[  167.548573]  [<ffffffff810512ae>] __do_softirq+0xce/0x3c0
[  167.548573]  [<ffffffff817e84ac>] call_softirq+0x1c/0x30
[  167.548573]  [<ffffffff8100417d>] do_softirq+0x8d/0xc0
[  167.548573]  [<ffffffff810518de>] irq_exit+0xae/0xe0
[  167.548573]  [<ffffffff817e8bb3>] do_IRQ+0x63/0xe0
[  167.548573]  [<ffffffff817de1f0>] common_interrupt+0x70/0x70
[  167.548573]  <EOI> 
[  167.548573]  [<ffffffff8100a5f6>] ? mwait_idle+0xb6/0x490
[  167.548573]  [<ffffffff8100a5ed>] ? mwait_idle+0xad/0x490
[  167.548573]  [<ffffffff810011e6>] cpu_idle+0x96/0xe0
[  167.548573]  [<ffffffff817cb475>] start_secondary+0x1be/0x1c2
[  167.548573] Code: ee 01 00 00 10 e8 03 ff ff ff 48 85 db 75 de 5b 41 5c
5d c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 66 66 66 66 90 be ff ff ff ff
<f0> 0f c1 77 48 83 ee 01 e8 d5 fe ff ff 5d c3 0f 1f 00 55 48 89 
[  167.548573] RIP  [<ffffffff8144d6fe>] closure_put+0xe/0x20
[  167.548573]  RSP <ffff88013fc83c60>

Thanks
Vivek

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