linux-kernel - Re: [PATCH] sched: fix another race when reading /proc/sched

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Message-ID: <6599ad830812160123x4a088632re220d081788b7187@mail.gmail.com>
Date:	Tue, 16 Dec 2008 01:23:47 -0800
From:	Paul Menage <menage@...gle.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Li Zefan <lizf@...fujitsu.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] sched: fix another race when reading /proc/sched_debug

On Sun, Dec 14, 2008 at 5:50 PM, KAMEZAWA Hiroyuki
<kamezawa.hiroyu@...fujitsu.com> wrote:
>
> at creation:
>  - cpu_cgroup_populate() should record "tg" that "this cgroup has valid dentry"
> at deletion

Wouldn't moving the call to cgroup_create_dir() to before doing
subsystem initialization fix this problem more straightforwardly? Then
by the time the cpu subsytem create() callback is called, dentry will
already be valid.

Paul
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