linux-kernel - Re: [PATCH] net: fix race in the receive/select

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Message-ID: <20090701083144.GA31863@gondor.apana.org.au>
Date:	Wed, 1 Jul 2009 16:31:44 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	jolsa@...hat.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, fbl@...hat.com, nhorman@...hat.com,
	davem@...hat.com, oleg@...hat.com, eric.dumazet@...il.com
Subject: Re: [PATCH] net: fix race in the receive/select

On Wed, Jul 01, 2009 at 09:22:26AM +0200, Andi Kleen wrote:
>
> Agreed.
> 
> I suspect the reordering of the wake queue tests might makes a difference, but
> in this case to ensure they are always tested in the proper order by
> the compiler would need more smp_rmb()s

I just looked up the original bug report and it's against RHEL4
which is a 2.6.9 kernel.  Jiri, have we reproduced this on a more
recent kernel?

Thanks,
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