linux-kernel - Re: [PATCH 1/2] cgroups: cleanup for dummy root

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Message-ID: <492FB3FB.6060806@cn.fujitsu.com>
Date:	Fri, 28 Nov 2008 17:03:55 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Paul Menage <menage@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux Containers <containers@...ts.linux-foundation.org>
Subject: Re: [PATCH 1/2] cgroups: cleanup for dummy root

Li Zefan wrote:
> - Don't link rootnode to the root list, so root_list contains active
>   hierarchies only as the comment indicates.
> 
> - Don't link css_sets to the dummy cgroup, because we never want to
>   run through the tasks in that dummpy cgroup (which means run
>   through all the tasks in the system).
> 
> Signed-off-by: Li Zefan <lizf@...fujitsu.com>

Hmmm...Sorry, this patch is wrong, when a subsystem is inactive thus in
rootnode, it may still iterate tasks in dummy top cgroup, though currently
no subsystem does so.

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