linux-kernel - Re: [PATCH next-next-2.6 v2] virtio_net: missing sg_init

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Message-Id: <20100331.031636.04083770.davem@davemloft.net>
Date:	Wed, 31 Mar 2010 03:16:36 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mst@...hat.com
Cc:	mashirle@...ibm.com, thomas@...htm.de, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH next-next-2.6 v2] virtio_net: missing sg_init_table

From: "Michael S. Tsirkin" <mst@...hat.com>
Date: Wed, 31 Mar 2010 12:20:22 +0300

> On Mon, Mar 29, 2010 at 06:19:15PM -0700, Shirley Ma wrote:
>> Add missing sg_init_table for sg_set_buf in virtio_net which
>> induced in defer skb patch.
>> 
>> Reported-by: Thomas Müller <thomas@...htm.de>
>> Tested-by: Thomas Müller <thomas@...htm.de>
>> Signed-off-by: Shirley Ma <xma@...ibm.com>
> 
> I'm concerned that the 'big' path might cause a performance regression.
> Let's move sg into virtnet_info so that this needs to be only called
> once?

Yeah that might improve things.

Shirley's change is already in net-next-2.6 so anything implementing
this would need to be submitted relative to that.
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