linux-kernel - Re: BUG: using smp_processor_id() in preemptible [00000000] code: icedove-bin/5449

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Message-ID: <4BFC8CC5.2000906@example.com>
Date:	Wed, 26 May 2010 04:51:49 +0200
From:	Piotr Hosowicz <piotr@...owicz.com>
To:	piotr@...owicz.com
CC:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org, Jens Axboe <jens.axboe@...cle.com>,
	Divyesh Shah <dpshah@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: BUG: using smp_processor_id() in preemptible [00000000] code:
 icedove-bin/5449

On 26.05.2010 04:06, Piotr Hosowicz wrote:
> On 25.05.2010 18:47, Piotr Hosowicz wrote:
>> On 25.05.2010 18:15, Peter Zijlstra wrote:
>>> On Tue, 2010-05-25 at 16:48 +0200, Piotr Hosowicz wrote:
>>>> May 25 15:04:35 aapi205 kernel: [ 9694.523288] BUG: using
>>>> smp_processor_id() in preemptible [00000000] code: shutdown/16256
>>>> May 25 15:04:35 aapi205 kernel: [ 9694.523296] caller is
>>>> dqstats_inc+0x19/0x2c
>>>> May 25 15:04:35 aapi205 kernel: [ 9694.523299] Pid: 16256, comm:
>>>> shutdown Tainted: P W 2.6.34-20100524-1752-patched #1
>>>> May 25 15:04:35 aapi205 kernel: [ 9694.523301] Call Trace:
>>>> May 25 15:04:35 aapi205 kernel: [ 9694.523308] [<ffffffff811a537b>]
>>>> debug_smp_processor_id+0xc7/0xe0
>>>> May 25 15:04:35 aapi205 kernel: [ 9694.523311] [<ffffffff8112c0ad>]
>>>> dqstats_inc+0x19/0x2c
>>>> May 25 15:04:35 aapi205 kernel: [ 9694.523314] [<ffffffff8112ee66>]
>>>> vfs_quota_sync+0x1b1/0x293
>>>> May 25 15:04:35 aapi205 kernel: [ 9694.523319] [<ffffffff8103bf21>] ?
>>>> wake_up_process+0x10/0x12
>>>
>>> That's a different issue, see:
>>>
>>> http://lkml.org/lkml/2010/5/22/164
>>
>> I do not understand fully - does that mean I have to revert commit
>> a7cf4145b? And how to do it? Let's assume I git-pulled the source. What
>> should be next steps.
>
> Ok, my fault, now I know how to revert. But I still do not know if this
> is the right solution you meant. In the meantime I build the kernel
> after revert.

Ok, I reverted the commit, built the kernel and rebooted - the problem 
is still the same during shutdown.

Regards,

Piotr Hosowicz

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NB: 2.6.34-20100526-0324-pchd-and-revtd
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