linux-kernel - Re: [PATCH] sched/kthread: Complain loudly when others violate our flags

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Message-ID: <1317374997.19415.16.camel@twins>
Date:	Fri, 30 Sep 2011 11:29:57 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Tejun Heo <htejun@...il.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] sched/kthread: Complain loudly when others violate our
 flags

On Fri, 2011-09-30 at 10:34 +0200, Peter Zijlstra wrote:
> Introduce a new WQ_NON_AFFINE flag that indicates a per-cpu workqueue
> will not respect cpu affinity and use this to migrate all its pending
> works to whatever cpu is doing cpu-down. 

Forgot to mention, it will also dis-allow queue_work_on() usage for
these workqueues, since that API implies you actually care what cpu the
work runs on, which cannot be guaranteed.
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