From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44764) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XExMB-0004uH-L3 for qemu-devel@nongnu.org; Wed, 06 Aug 2014 05:18:09 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XExM5-0004gG-6r for qemu-devel@nongnu.org; Wed, 06 Aug 2014 05:18:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:14787) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XExM4-0004fy-Vv for qemu-devel@nongnu.org; Wed, 06 Aug 2014 05:17:57 -0400 Date: Wed, 6 Aug 2014 10:17:50 +0100 From: "Dr. David Alan Gilbert" Message-ID: <20140806091749.GB2368@work-vm> References: <20140805185739.GD2340@work-vm> <53E1DD98.8070108@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Subject: Re: [Qemu-devel] qemu live migration error from 2.0 to 2.1 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: William Dauchy Cc: Paolo Bonzini , QEMU Developers , Igor Mammedov * William Dauchy (wdauchy@gmail.com) wrote: > On Wed, Aug 6, 2014 at 9:47 AM, Paolo Bonzini wrote: > > I suspect he's using "-M pc" on both. > > Is it the default value? because it's not the case in my command line. > > > You must use "-M pc-i440fx-2.0" > > on both if you're migrating from 2.0 to a different version. > > wow. I wasn't expecting such behavior; i.e migration between qemu > version does not seem trivial and it removes the benefits; better > using stop/start. > thanks for the info. The trick is to pick a -M value and stick with it; then you should be able to keep migrating to newer QEMU versions easily (just don't go with dev versions because things are often broken in them). -M pc is special, don't use that if you want to be able to migrate Dave -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK