netdev - Re: [RFC PATCH v7 01/19] Add a new structure for skb buffer from external.

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Message-ID: <20100620113609.GA31693@gondor.apana.org.au>
Date:	Sun, 20 Jun 2010 21:36:09 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	"Xin, Xiaohui" <xiaohui.xin@...el.com>,
	Stephen Hemminger <shemminger@...tta.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"jdike@...ux.intel.com" <jdike@...ux.intel.com>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [RFC PATCH v7 01/19] Add a new structure for skb buffer from
	external.

On Sun, Jun 20, 2010 at 02:11:24PM +0300, Michael S. Tsirkin wrote:
>
> Rather than modifying all guests, it seems much easier not to assume
> specific buffer layout in host.  Copying network header around seems a
> small cost.

Well sure we can debate the specifics of this implementation detail.

However, the fact that virtio_net doesn't support feature renegotiation
on live migration is not a valid reason against this.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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