From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [RFC PATCH v7 01/19] Add a new structure for skb buffer from external. Date: Sun, 20 Jun 2010 13:39:09 +0300 Message-ID: <20100620103909.GA5285@redhat.com> References: <20100611052112.GA25649@gondor.apana.org.au> <20100617112119.GB1515@gondor.apana.org.au> <20100618055929.GA11333@gondor.apana.org.au> <20100620100631.GB4578@redhat.com> <20100620103235.GA31284@gondor.apana.org.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "Xin, Xiaohui" , Stephen Hemminger , "netdev@vger.kernel.org" , "kvm@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "mingo@elte.hu" , "davem@davemloft.net" , "jdike@linux.intel.com" , Rusty Russell To: Herbert Xu Return-path: Content-Disposition: inline In-Reply-To: <20100620103235.GA31284@gondor.apana.org.au> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Sun, Jun 20, 2010 at 08:32:35PM +1000, Herbert Xu wrote: > On Sun, Jun 20, 2010 at 01:06:32PM +0300, Michael S. Tsirkin wrote: > > > > Changing the guest virtio to match the backend is a problem, > > this breaks migration etc. > > As long as it's done in a backwards compatible way it should be > fine. Possibly, but to me the need to do this implies that we'll need another change with different hardware at the backend. > It's just like migrating from a backend that supports TSO > to one that doesn't. > > Cheers, Exactly. We don't support such migration. > -- > Visit Openswan at http://www.openswan.org/ > Email: Herbert Xu ~{PmV>HI~} > Home Page: http://gondor.apana.org.au/~herbert/ > PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt