linux-kernel - Re: [PATCH 3/4] Add a back-pointer from struct cg_cgroup

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Message-ID: <6599ad830907230731v13b18e17vbed373f57f878c85@mail.gmail.com>
Date:	Thu, 23 Jul 2009 07:31:34 -0700
From:	Paul Menage <menage@...gle.com>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	akpm@...ux-foundation.org, containers@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] Add a back-pointer from struct cg_cgroup_link to 
	struct cgroup

On Wed, Jul 22, 2009 at 11:44 PM, Li Zefan<lizf@...fujitsu.com> wrote:
>
> I think we need to cgroup_enable_task_cg_lists():
>
>        if (!use_task_css_set_links)
>                cgroup_enable_task_cg_lists();
>
> Otherwise we'll see no tasks when reading this debug file
> if use_task_css_set_links == 0.
>

I think that's OK - the debug file should indicate the state of the
kernel, not alter it. If there are no links, then no links should be
printed.

Paul
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