From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:37186) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SCZak-00074f-GY for qemu-devel@nongnu.org; Tue, 27 Mar 2012 12:50:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SCZai-0005dO-3s for qemu-devel@nongnu.org; Tue, 27 Mar 2012 12:49:54 -0400 Received: from mail-yx0-f173.google.com ([209.85.213.173]:54860) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SCZai-0005dA-0A for qemu-devel@nongnu.org; Tue, 27 Mar 2012 12:49:52 -0400 Received: by yenr5 with SMTP id r5so125417yen.4 for ; Tue, 27 Mar 2012 09:49:50 -0700 (PDT) Message-ID: <4F71EFAB.4070304@codemonkey.ws> Date: Tue, 27 Mar 2012 11:49:47 -0500 From: Anthony Liguori MIME-Version: 1.0 References: <20120327085521.GA4567@dhcp-192-168-178-175.profitbricks.localdomain> <4F718E8B.5090601@siemens.com> <4F71E3CC.9070103@redhat.com> <4F71E95C.3070100@siemens.com> <4F71ED3F.4030809@codemonkey.ws> <4F71EEEC.5000903@redhat.com> In-Reply-To: <4F71EEEC.5000903@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] live migration between qemu-kvm 1.0 and 0.15 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Avi Kivity Cc: Vasilis Liaskovitis , Jan Kiszka , "qemu-devel@nongnu.org" , "kvm@vger.kernel.org" , Juan Quintela On 03/27/2012 11:46 AM, Avi Kivity wrote: > On 03/27/2012 06:39 PM, Anthony Liguori wrote: >> >> So, since we're approaching 1.1, we should really discuss release >> criteria for 1.1 with respect to live migration. I'd prefer to avoid >> surprises in this release. > > Agree strongly. > >> >> My expectation is that migration works from: >> >> qemu-1.0 -M 1.0 => qemu-1.1 -M 1.1 > > Why do you expect that? Maybe you meant -M 1.0 at the end? Sorry, I did mean -M 1.0. > >> qemu-1.1 -M 1.0<= qemu-1.1 -M 1.0 >> >> I would expect that migration works from: >> >> qemu-0.15 -M 0.15 => qemu-1.1 -M 0.15 >> > > Ack. > >> I'm okay if this fails gracefully: >> >> qemu-1.1 -M 0.15<= qemu-0.15 -M 0.15 > > RHEL has more stringent requirements (going back to its heavily patched > 0.12). I think we should have the infrastructure that allow one to add > the hacks to make this work, even if we don't actually do the compat > work for the release (I think it's fine for qemu to support just one > version going back; and unreasonable to require it to go as far back as > RHEL). This is reasonable to me. Regards, Anthony Liguori >