linux-kernel - Re: [PATCH 2/4] cgroup: remove redundant get/put of task struct

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Message-ID: <4EF2C1CB.4030103@cn.fujitsu.com>
Date:	Thu, 22 Dec 2011 13:36:11 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Mandeep Singh Baines <msb@...omium.org>
CC:	Tejun Heo <tj@...nel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	linux-kernel@...r.kernel.org,
	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 2/4] cgroup: remove redundant get/put of task struct

Mandeep Singh Baines wrote:
> threadgroup_lock() guarantees that the target threadgroup will
> remain stable - no new task will be added, no new PF_EXITING
> will be set and exec won't happen.
> 
> Changes in V2:
> * https://lkml.org/lkml/2011/12/20/369 (Tejun Heo)
>   * Undo incorrect removal of get/put from attach_task_by_pid()
> * Author
>   * Remove a comment which is made stale by this change
> 
> Signed-off-by: Mandeep Singh Baines <msb@...omium.org>

Acked-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 |   11 ++---------
>  1 files changed, 2 insertions(+), 9 deletions(-)
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