From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48339) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X5Yhg-0006pv-CY for qemu-devel@nongnu.org; Fri, 11 Jul 2014 07:09:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1X5YhX-0001qL-AG for qemu-devel@nongnu.org; Fri, 11 Jul 2014 07:09:24 -0400 Received: from mail-ig0-x22f.google.com ([2607:f8b0:4001:c05::22f]:44359) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X5YhX-0001q1-5P for qemu-devel@nongnu.org; Fri, 11 Jul 2014 07:09:15 -0400 Received: by mail-ig0-f175.google.com with SMTP id uq10so1653700igb.8 for ; Fri, 11 Jul 2014 04:09:14 -0700 (PDT) Sender: Paolo Bonzini Message-ID: <53BFC5D6.5040701@redhat.com> Date: Fri, 11 Jul 2014 13:09:10 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <53BC1B73.4070304@suse.de> <878uo3f0f8.fsf@blackfin.pond.sub.org> <53BD6CFD.5090006@suse.de> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] live migration + licensing issue. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Anshul Makkar , =?UTF-8?B?QW5kcmVhcyBG?= =?UTF-8?B?w6RyYmVy?= Cc: qemu-devel , Markus Armbruster Il 11/07/2014 12:14, Anshul Makkar ha scritto: > Hi Andreas, > > "the point is that the machine version on the destination side needs > to match the source side". I hope this is just to avoid the licensing > issue. Else, in all other circumstance, we can specify different pc > models while migrating from source to destination. No, it is always necessary. Think of it like this: you hibernate your workstation, change the motherboard and turn it on. What chances would it have to work? Of course changes in the machine types from one version to the next are _usually_ minor, but sometimes they can completely break the software. For example we've had a couple changes to the memory map over the years. Paolo