linux-kernel - Re: [PATCH 1/6] cgroup: subsys->attach_task() should be called after migration

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Date:	Wed, 24 Aug 2011 02:32:36 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Tejun Heo <tj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	rjw@...k.pl, paul@...lmenage.org, lizf@...fujitsu.com,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org
Subject: Re: [PATCH 1/6] cgroup: subsys->attach_task() should be called after
 migration

On Wed, Aug 24, 2011 at 12:19:55AM +0200, Tejun Heo wrote:
> cgroup_attach_task() calls subsys->attach_task() after
> cgroup_task_migrate(); however, cgroup_attach_proc() calls it before
> migration.  This actually affects some of the users.  Update
> cgroup_attach_proc() such that ->attach_task() is called after
> migration.

There have been a patch posted recently:

        "[PATCH][BUGFIX] cgroups: fix ordering of calls in cgroup_attach_proc"

that not only fixes that ordering but also only attach the task if the
migration happened correctly (task not exited).

Can somebody queue it for 3.2 ?
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