From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: AMD Opteron 6276 to Intel Xeon E5645 live migration failure Date: Fri, 28 Feb 2014 13:57:06 +0100 Message-ID: <531087A2.7070604@redhat.com> References: <53107E2E.10201@bytemark.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Nick Thomas , "Qemu-devel@nongnu.org" Return-path: Received: from mail-qc0-f181.google.com ([209.85.216.181]:64396 "EHLO mail-qc0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751650AbaB1M5O (ORCPT ); Fri, 28 Feb 2014 07:57:14 -0500 Received: by mail-qc0-f181.google.com with SMTP id c9so615549qcz.40 for ; Fri, 28 Feb 2014 04:57:13 -0800 (PST) In-Reply-To: <53107E2E.10201@bytemark.co.uk> Sender: kvm-owner@vger.kernel.org List-ID: Il 28/02/2014 13:16, Nick Thomas ha scritto: > I'd love to get this working, but I'm a little ignorant on where to > begin, or even if it's possible at all. Are these CPUs just too old, or > is a fixup missing in qemu (or kvm)? It's the latter (in kvm). Note that for migration to work, especially for such different models, you have to disable CPU features that aren't present in both models. In general the way to do this is to add "-cpu". I'd start debugging with "-cpu kvm64" on both sides. Paolo