linux-kernel - Re: [RFC][PATCH 2/7][memcg] cgroup arbitarary ID allocation

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Message-ID: <20100802180429.GY3863@balbir.in.ibm.com>
Date:	Mon, 2 Aug 2010 23:34:29 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	gthelen@...gle.com, m-ikeda@...jp.nec.com,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC][PATCH 2/7][memcg] cgroup arbitarary ID allocation

* KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> [2010-07-27 16:54:17]:

> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> 
> When a subsystem want to make use of "id" more, it's necessary to
> manage the id at cgroup subsystem creation time. But, now,
> because of the order of cgroup creation callback, subsystem can't
> declare the id it wants. This patch allows subsystem to use customized
> ID for themselves.
> 
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> ---

What happens if the id is taken already? Could you please explain how
this is used?

-- 
	Three Cheers,
	Balbir
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