linux-kernel - Re: WARNING at kernel/workqueue.c:829 wq_worker_waking

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Date:	Thu, 20 Feb 2014 22:45:32 +0800
From:	Lan Tianyu <tianyu.lan@...el.com>
To:	Jiri Olsa <jolsa@...hat.com>
CC:	Tejun Heo <tj@...nel.org>, Oleg Nesterov <oleg@...hat.com>,
	Zhang Rui <rui.zhang@...el.com>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: WARNING at kernel/workqueue.c:829 wq_worker_waking_up+0x53/0x70()

On 02/20/2014 10:31 PM, Jiri Olsa wrote:
> On Thu, Feb 20, 2014 at 09:28:26PM +0800, Lan Tianyu wrote:
>> On 02/19/2014 06:49 AM, Tejun Heo wrote:
>>> Hello,
>>>
>>> On Mon, Feb 17, 2014 at 06:19:00PM +0100, Oleg Nesterov wrote:
>>>> acpi_processor_set_throttling() plays with set_cpus_allowed_ptr(current),
>>>> this is obviously wrong, and the worker is bound.
>>>
>>> Umm... yeah, anything running on workqueues shouldn't be diddling with
>>> cpu affinity.  The function even has /* FIXME: use work_on_cpu() */ in
>>> it.  I suppose it's about time to actually implement that?
>>>
>>> Thanks.
>>>
>>
>> Hi Jiri:
>> 	Could you try this patch which reworks ACPI processor throttling
>> with work_on_cpu()?
>
> hum, I've got difficulties to apply it..
>
> [jolsa@...va2 linux-perf]$ git am /tmp/wq/
> Applying: WARNING at kernel/workqueue.c:829 wq_worker_waking_up+0x53/0x70()
> fatal: corrupt patch at line 8
> Patch failed at 0001 WARNING at kernel/workqueue.c:829 wq_worker_waking_up+0x53/0x70()
>
> jirka
>
Sorry. Please try the attachment again.

-- 
Best Regards
Tianyu Lan

View attachment "0001-ACPI-Processor-Rework-processor-throttling-with-work.patch" of type "text/x-patch" (3797 bytes)