From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ryan Harper Subject: Re: Live migration of x86-64 kvm guests broken? Date: Wed, 2 Dec 2009 10:44:08 -0600 Message-ID: <20091202164408.GQ27346@us.ibm.com> References: <4B1686AB.4020206@siemens.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: qemu-devel , kvm , Juan Quintela , Pierre Riteau , Liran Schour To: Jan Kiszka Return-path: Received: from e3.ny.us.ibm.com ([32.97.182.143]:41525 "EHLO e3.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754455AbZLBQoH (ORCPT ); Wed, 2 Dec 2009 11:44:07 -0500 Received: from d01relay01.pok.ibm.com (d01relay01.pok.ibm.com [9.56.227.233]) by e3.ny.us.ibm.com (8.14.3/8.13.1) with ESMTP id nB2GZIdK009381 for ; Wed, 2 Dec 2009 11:35:18 -0500 Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay01.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id nB2GiCgZ128144 for ; Wed, 2 Dec 2009 11:44:12 -0500 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.14.3/8.13.1/NCO v10.0 AVout) with ESMTP id nB2CYOKP003781 for ; Wed, 2 Dec 2009 07:34:25 -0500 Content-Disposition: inline In-Reply-To: <4B1686AB.4020206@siemens.com> Sender: kvm-owner@vger.kernel.org List-ID: * Jan Kiszka [2009-12-02 09:28]: > Hi, > > I'm facing stalled x86-64 guests after live migration when using kvm > (share disk images). This does not happen with x86-32 guests or when > disabling kvm. Both qemu and qemu-kvm git heads are affected (recent > vmstate fixes applied). Running I/O load during the migration (e.g. a > simple "ls -R /") seems to trigger it reliably. > > Can anyone confirm / comment on this? Do we fail to restore some magic > state that only long mode cares about? Just tested upstream qemu.git (with vmstate fixes) and I could migrate RHEL 5.3 64-bit guest with your light io load over localhost. I'll try remote hosts next. -- Ryan Harper Software Engineer; Linux Technology Center IBM Corp., Austin, Tx ryanh@us.ibm.com