linux-kernel - Re: [PATCH 2/2] cgroups: convert ss->attach to use whole threadgroup flex

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Message-ID: <20111014122126.GL14968@somewhere>
Date:	Fri, 14 Oct 2011 14:21:30 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ben Blum <bblum@...rew.cmu.edu>, Tejun Heo <tj@...nel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>, linux-kernel@...r.kernel.org,
	NeilBrown <neilb@...e.de>, paulmck@...ux.vnet.ibm.com,
	Paul Menage <paul@...lmenage.org>,
	Li Zefan <lizf@...fujitsu.com>,
	containers@...ts.linux-foundation.org,
	Balbir Singh <bsingharora@...il.com>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [PATCH 2/2] cgroups: convert ss->attach to use whole threadgroup
 flex_array (cpuset, memcontrol)

On Thu, Oct 13, 2011 at 08:36:01PM -0400, Ben Blum wrote:
> Convert ss->attach to take a flex_array of tasks instead of just the leader.
> 
> From: Ben Blum <bblum@...rew.cmu.edu>
> 
> This lets subsystems with whole-threadgroup attach calls (i.e., cpuset and
> memcontrol) to accurately find the group's mm even when a non-leader does exec
> and leaves the leader with a NULL mm pointer.
> 
> Also converts cpuset and memcontrol to take the flex_array and iterate down it
> until an mm is found, instead of just attempting to use the leader's mm.
> 
> Signed-off-by: Ben Blum <bblum@...rew.cmu.edu>

I think there are patches from Tejun that handle that did that already?

https://lkml.org/lkml/2011/8/23/418
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