linux-kernel - Re: [PATCH 4/7] sched: implement force_cpus

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Message-ID: <4B1E37F5.7060002@kernel.org>
Date:	Tue, 08 Dec 2009 20:26:45 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	tglx@...utronix.de, mingo@...e.hu, avi@...hat.com, efault@....de,
	rusty@...tcorp.com.au, linux-kernel@...r.kernel.org,
	Gautham R Shenoy <ego@...ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 4/7] sched: implement force_cpus_allowed()

Hello,

On 12/08/2009 07:38 PM, Peter Zijlstra wrote:
> More confusion, kthread_bind() doesn't even use set_cpus_allowed() so it
> wouldn't have hit any of that crap.

kthread_bind() can't be used safely unless cpu up/down is synchronized
out some way.

Thanks.

-- 
tejun
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