linux-kernel - Re: [PATCH 3/3] vhost-net: use lock_sock_fast() in peek_head

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Message-ID: <20110313164359.GA32562@redhat.com>
Date:	Sun, 13 Mar 2011 18:43:59 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Jason Wang <jasowang@...hat.com>, virtualization@...ts.osdl.org,
	netdev@...r.kernel.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] vhost-net: use lock_sock_fast() in peek_head_len()

On Sun, Mar 13, 2011 at 05:32:07PM +0100, Eric Dumazet wrote:
> Le dimanche 13 mars 2011 à 18:19 +0200, Michael S. Tsirkin a écrit :
> 
> > Other side is in drivers/net/tun.c and net/packet/af_packet.c
> > At least wrt tun it seems clear socket is not locked.
> 
> Yes (assuming you refer to tun_net_xmit())
> 
> > Besides queue, dequeue seems to be done without socket locked.
> > 
> 
> It seems this code (assuming you speak of drivers/vhost/net.c ?) has
> some races indeed.
> 

Hmm. Any more besides the one fixed here?

-- 
MST
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