netdev - Re: [PATCH] cls_cgroup: read classid atomically in classifier

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Message-Id: <20090526.204710.124271694.davem@davemloft.net>
Date:	Tue, 26 May 2009 20:47:10 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	menage@...gle.com
Cc:	lizf@...fujitsu.com, akpm@...ux-foundation.org, tgraf@...g.ch,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] cls_cgroup: read classid atomically in classifier

From: Paul Menage <menage@...gle.com>
Date: Tue, 26 May 2009 12:59:11 -0700

> cls_cgroup: read classid atomically in classifier
> 
> Avoid reading the unsynchronized value cs->classid multiple times,
> since it could change concurrently from non-zero to zero; this would
> result in the classifier returning a positive result with a bogus
> (zero) classid.
> 
> Signed-off-by: Paul Menage <menage@...gle.com>
> Reviewed-by: Li Zefan <lizf@...fujitsu.com>

Patch applied, thanks!
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