linux-kernel - Re: [PATCH] cpuset: rcu_read_lock() to protect task_cs() even we don't dereference to task

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Message-ID: <6599ad830811211107n141e6cb5n2abf14e59110d764@mail.gmail.com>
Date:	Fri, 21 Nov 2008 11:07:10 -0800
From:	Paul Menage <menage@...gle.com>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux Containers <containers@...ts.linux-foundation.org>
Subject: Re: [PATCH] cpuset: rcu_read_lock() to protect task_cs() even we 
	don't dereference to task_cs()'s return value

On Fri, Nov 21, 2008 at 11:05 AM, Paul Menage <menage@...gle.com> wrote:
>
> Wouldn't this be fixed by your patch that adds an rcu_read_lock() to
> task_subsys_state() ?
>

Sorry, your other patch actually adds the rcu_read_lock() to
task_cgroup(). But adding an rcu_read_lock() to task_subsys_state()
would also help here.

Paul
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