linux-kernel - Re: [RFC][-mm] Add an owner to the mm

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Message-ID: <47F45DD9.4030004@linux.vnet.ibm.com>
Date:	Thu, 03 Apr 2008 10:02:25 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Paul Menage <menage@...gle.com>
CC:	Pavel Emelianov <xemul@...nvz.org>,
	Hugh Dickins <hugh@...itas.com>,
	Sudhir Kumar <skumar@...ux.vnet.ibm.com>,
	YAMAMOTO Takashi <yamamoto@...inux.co.jp>, lizf@...fujitsu.com,
	linux-kernel@...r.kernel.org, taka@...inux.co.jp,
	linux-mm@...ck.org, David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [RFC][-mm] Add an owner to the mm_struct (v4)

Paul Menage wrote:
> On Wed, Apr 2, 2008 at 9:05 PM, Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
>>  I checked to see that cgroup_exit is called after mm_update_new_owner(). We call
>>  mm_update_new_owner() from exit_mm(). I did not check for current->cgroups !=
>>  new_owner->cgroups, since I did not want to limit the callbacks.
> 
> No cgroup subsystem should be concerned about mm ownership changes
> between tasks in the same cgroup. So I think that's a valid and useful
> optimization.
> 

Hmm. probably.. I'll do that check. Let me post v5 with these changes

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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