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

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Message-ID: <20140218224907.GG31892@mtj.dyndns.org>
Date:	Tue, 18 Feb 2014 17:49:07 -0500
From:	Tejun Heo <tj@...nel.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Jiri Olsa <jolsa@...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()

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.

-- 
tejun
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