linux-kernel - Re: next-20081114: WARNING: at block/blk-barrier.c:246 blk_do

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Message-ID: <a4423d670811150925qf74b63dy1ef923347140a8fe@mail.gmail.com>
Date:	Sat, 15 Nov 2008 20:25:58 +0300
From:	"Alexander Beregalov" <a.beregalov@...il.com>
To:	"Jens Axboe" <jens.axboe@...cle.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, linux-next@...r.kernel.org
Subject: Re: next-20081114: WARNING: at block/blk-barrier.c:246 blk_do_ordered()

2008/11/15 Jens Axboe <jens.axboe@...cle.com>:
> On Fri, Nov 14 2008, Alexander Beregalov wrote:
>> WARNING: at block/blk-barrier.c:246 blk_do_ordered+0x22b/0x26a()
>> Modules linked in:
>> Pid: 0, comm: swapper Not tainted 2.6.28-rc4-next-20081114 #3
>> Call Trace:
>>  <IRQ>  [<ffffffff80236d63>] warn_on_slowpath+0x58/0x7d
>>  [<ffffffff802570e3>] ? mark_lock+0x1c/0x37a
>>  [<ffffffff803a69f9>] ? elv_rb_del+0x30/0x4b
>>  [<ffffffff803b1092>] ? cfq_remove_request+0x180/0x1d8
>>  [<ffffffff803afd03>] ? __cfq_slice_expired+0xd6/0xeb
>>  [<ffffffff803afd31>] ? cfq_slice_expired+0x19/0x1b
>>  [<ffffffff803b1832>] ? cfq_dispatch_requests+0x2c1/0x37e
>>  [<ffffffff803aa98c>] blk_do_ordered+0x22b/0x26a
>>  [<ffffffff803a6560>] elv_next_request+0x1d0/0x210
>>  [<ffffffff80439c7c>] scsi_request_fn+0x9e/0x539
>>  [<ffffffff80255c66>] ? put_lock_stats+0xe/0x27
>>  [<ffffffff803a827e>] blk_invoke_request_fn+0x3b/0x6e
>>  [<ffffffff803a87fd>] __blk_run_queue+0x25/0x29
>>  [<ffffffff803a8822>] blk_run_queue+0x21/0x35
>>  [<ffffffff80439509>] scsi_run_queue+0x2cf/0x379
>>  [<ffffffff8043a33e>] scsi_next_command+0x36/0x46
>>  [<ffffffff8043a509>] scsi_end_request+0x92/0xa4
>>  [<ffffffff8043aae7>] scsi_io_completion+0x1a7/0x3ad
>>  [<ffffffff80434551>] scsi_finish_command+0xe9/0xf2
>>  [<ffffffff8043afd5>] scsi_softirq_done+0x10e/0x117
>>  [<ffffffff803ac393>] blk_done_softirq+0x7f/0x8f
>>  [<ffffffff8023c173>] __do_softirq+0x70/0x101
>>  [<ffffffff8020cc0c>] call_softirq+0x1c/0x28
>>  [<ffffffff8020e229>] do_softirq+0x39/0x8a
>>  [<ffffffff8023bd78>] irq_exit+0x45/0xa2
>>  [<ffffffff8020e53a>] do_IRQ+0x16a/0x19c
>>  [<ffffffff8020bceb>] ret_from_intr+0x0/0xf
>>  <EOI>  [<ffffffff80212e09>] ? mwait_idle+0x3e/0x48
>>  [<ffffffff80212e00>] ? mwait_idle+0x35/0x48
>>  [<ffffffff8020a940>] ? cpu_idle+0x51/0xba
>>  [<ffffffff80514f9c>] ? rest_init+0x70/0x72
>> ---[ end trace 115cb4be7e150bb9 ]---
>
> I'm assuming this is new with -next and doesn't happen with 2.6.28-rc4?
Yes.
> Is it reproducible in -next?
I have seen it only once yet.
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