linux-kernel - Re: [PATCH 0/3] resend, cpuset/hotplug fixes

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Message-Id: <1252654659.7126.2.camel@laptop>
Date:	Fri, 11 Sep 2009 09:37:39 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Gautham Shenoy <ego@...ibm.com>, Ingo Molnar <mingo@...e.hu>,
	Jiri Slaby <jirislaby@...il.com>,
	Li Zefan <lizf@...fujitsu.com>,
	Miao Xie <miaox@...fujitsu.com>,
	Paul Menage <menage@...gle.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Rusty Russell <rusty@...tcorp.com.au>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] resend, cpuset/hotplug fixes

On Fri, 2009-09-11 at 15:15 +0800, Lai Jiangshan wrote:
> 
> I have different concept. cpuset_cpus_allowed() is not called at atomic
> context nor non-preemptable context nor other critical context.
> So it should be allowed to use mutexs. That's what I think.

It hardly does any work at all, so why bother with a mutex?

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