linux-kernel - Re: [PATCH 3/5] cgroup: only need to check oldcgrp==newgrp once

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Message-ID: <4EF13675.9030000@cn.fujitsu.com>
Date:	Wed, 21 Dec 2011 09:29:25 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Mandeep Singh Baines <msb@...omium.org>
CC:	Tejun Heo <tj@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	containers@...ts.linux-foundation.org, cgroups@...r.kernel.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Paul Menage <paul@...lmenage.org>
Subject: Re: [PATCH 3/5] cgroup: only need to check oldcgrp==newgrp once

Mandeep Singh Baines wrote:
> In cgroup_attach_proc it is now sufficient to only check that
> oldcgrp==newcgrp once. Now that we are using threadgroup_lock()
> during the migrations, oldcgrp will not change.
> 
> Signed-off-by: Mandeep Singh Baines <msb@...omium.org>

Reviewed-by: Li Zefan <lizf@...fujitsu.com>

> Cc: Tejun Heo <tj@...nel.org>
> Cc: Li Zefan <lizf@...fujitsu.com>
> Cc: containers@...ts.linux-foundation.org
> Cc: cgroups@...r.kernel.org
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> Cc: Frederic Weisbecker <fweisbec@...il.com>
> Cc: Oleg Nesterov <oleg@...hat.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Paul Menage <paul@...lmenage.org>
> ---
>  kernel/cgroup.c |   17 ++++++-----------
>  1 files changed, 6 insertions(+), 11 deletions(-)
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