From mboxrd@z Thu Jan  1 00:00:00 1970
From: yamamoto-jCdQPDEk3idL9jVzuh4AOg@public.gmane.org (YAMAMOTO Takashi)
Subject: Re: [RFD][PATCH] memcg: Move Usage at Task Move
Date: Thu, 12 Jun 2008 14:20:33 +0900 (JST)
Message-ID: <20080612052033.ED6FD5A0D@siro.lan>
References: <20080611131437.76961fc3.kamezawa.hiroyu@jp.fujitsu.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
In-Reply-To: Your message of "Wed, 11 Jun 2008 13:14:37 +0900"
	<20080611131437.76961fc3.kamezawa.hiroyu-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
List-Unsubscribe: <https://lists.linux-foundation.org/mailman/listinfo/containers>,
	<mailto:containers-request-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org?subject=unsubscribe>
List-Archive: <http://lists.linux-foundation.org/pipermail/containers>
List-Post: <mailto:containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
List-Help: <mailto:containers-request-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org?subject=help>
List-Subscribe: <https://lists.linux-foundation.org/mailman/listinfo/containers>,
	<mailto:containers-request-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org?subject=subscribe>
Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
To: kamezawa.hiroyu-+CUm20s59erQFUHtdCDX3A@public.gmane.org
Cc: nishimura-YQH0OdQVrdy45+QrQBaojngSJqDPrsil@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, containers-qjLDD68F18O7TbgM5vRIOg@public.gmane.org, menage-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, balbir-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org, xemul-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org
List-Id: containers.vger.kernel.org

> > i think that you can redirect new charges in TASK to DEST
> > so that usage_of_task(TASK) will not grow.
> > 
> 
> Hmm, to do that, we have to handle complicated cgroup's attach ops.
> 
> at this moving, memcg is pointed by
>  - TASK->cgroup->memcg(CURR)
> after move
>  - TASK->another_cgroup->memcg(DEST)
> 
> This move happens before cgroup is replaced by another_cgroup.

currently cgroup_attach_task calls ->attach callbacks after
assigning tsk->cgroups.  are you talking about something else?

YAMAMOTO Takashi