linux-kernel - Re: [PATCH 04/10] cgroup: always lock threadgroup during migration

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Message-ID: <20111121220519.GO25776@google.com>
Date:	Mon, 21 Nov 2011 14:05:19 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	paul@...lmenage.org, rjw@...k.pl, lizf@...fujitsu.com,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org, matthltc@...ibm.com,
	akpm@...ux-foundation.org, oleg@...hat.com,
	kamezawa.hiroyu@...fujitsu.com
Subject: Re: [PATCH 04/10] cgroup: always lock threadgroup during migration

On Mon, Nov 14, 2011 at 07:52:43PM +0100, Frederic Weisbecker wrote:
> On Mon, Nov 14, 2011 at 07:46:34PM +0100, Frederic Weisbecker wrote:
> > I have the feeling the task_lock is now useless given that we are synchronized
> > against cgroup_exit() with the threadgroup_lock.
> > 
> > It's probably also useless in cgroup_exit(). But that's something for a further
> > patch...
> > 
> > Thanks.
> 
> Oops, I missed what Kamezawa said and your answer, sorry.

Yeap, I'll see how removing it for put looks.

Thanks.

-- 
tejun
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