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

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Message-ID: <20140220143102.GA12948@krava.brq.redhat.com>
Date:	Thu, 20 Feb 2014 15:31:03 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Lan Tianyu <tianyu.lan@...el.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: Re: WARNING at kernel/workqueue.c:829
 wq_worker_waking_up+0x53/0x70()

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
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