netdev - Re: [Xen-devel] [PATCH 1/1] xen/netback: only non-freed SKB is queued into tx

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Date:	Fri, 29 Jun 2012 08:23:09 +0100
From:	Ian Campbell <Ian.Campbell@...rix.com>
To:	David Miller <davem@...emloft.net>
CC:	"annie.li@...cle.com" <annie.li@...cle.com>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"konrad.wilk@...cle.com" <konrad.wilk@...cle.com>,
	"kurt.hackel@...cle.com" <kurt.hackel@...cle.com>
Subject: Re: [Xen-devel] [PATCH 1/1] xen/netback: only non-freed SKB is
 queued into tx_queue

On Fri, 2012-06-29 at 00:55 +0100, David Miller wrote:
> From: annie.li@...cle.com
> Date: Wed, 27 Jun 2012 18:46:58 +0800
> 
> > From: Annie Li <Annie.li@...cle.com>
> > 
> > After SKB is queued into tx_queue, it will be freed if request_gop is NULL.
> > However, no dequeue action is called in this situation, it is likely that
> > tx_queue constains freed SKB. This patch should fix this issue, and it is
> > based on 3.5.0-rc4+.
> > 
> > This issue is found through code inspection, no bug is seen with it currently.
> > I run netperf test for several hours, and no network regression was found.
> > 
> > Signed-off-by: Annie Li <annie.li@...cle.com>
> 
> I lack the expertiece necessary to properly review this, so I really
> need a Xen expert to look this over.

Sorry, I put it to one side waiting for the repost to netdev and then
forgot about it...

Yes, this change looks good to me:

Acked-by: Ian Campbell <ian.campbell@...rix.com>

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