linux-kernel - Re: [PATCH 1/5] cgroup: do ID allocation under css allocator.

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Date:	Wed, 25 Aug 2010 19:45:00 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	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>,
	"menage@...gle.com" <menage@...gle.com>,
	"lizf@...fujitsu.com" <lizf@...fujitsu.com>
Subject: Re: [PATCH 1/5] cgroup: do ID allocation under css allocator.

* KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> [2010-08-25 17:06:40]:

> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> 
> Now, css'id is allocated after ->create() is called. But to make use of ID
> in ->create(), it should be available before ->create().
> 
> In another thinking, considering the ID is tightly coupled with "css",
> it should be allocated when "css" is allocated.
> This patch moves alloc_css_id() to css allocation routine. Now, only 2 subsys,
> memory and blkio are useing ID. (To support complicated hierarchy walk.)
                       ^^^^ typo
> 
> ID will be used in mem cgroup's ->create(), later.
> 
> Note:
> If someone changes rules of css allocation, ID allocation should be moved too.
> 

What rules? could you please elaborate?

Seems cleaner, may be we need to update cgroups.txt?

-- 
	Three Cheers,
	Balbir
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