From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=53134 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OLyHP-0006RQ-TN for qemu-devel@nongnu.org; Tue, 08 Jun 2010 08:51:45 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OLyHJ-0005Pa-F4 for qemu-devel@nongnu.org; Tue, 08 Jun 2010 08:51:43 -0400 Received: from mx1.redhat.com ([209.132.183.28]:62173) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OLyHJ-0005PS-7y for qemu-devel@nongnu.org; Tue, 08 Jun 2010 08:51:37 -0400 Message-ID: <4C0E3CD5.4070202@redhat.com> Date: Tue, 08 Jun 2010 15:51:33 +0300 From: Avi Kivity MIME-Version: 1.0 References: <215BBDE4-B30E-4E55-8AC7-3B7C25662FAC@dlh.net> <4C0E09C0.9060300@dlh.net> <4C0E29B6.7060302@redhat.com> <4C0E2A1E.6080609@redhat.com> <4C0E2ECC.5090806@redhat.com> <4C0E3C46.30901@dlh.net> In-Reply-To: <4C0E3C46.30901@dlh.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] Re: Live Migration of 32-bit Linux guest broken since 2.6.35-rc2 List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Lieven Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org On 06/08/2010 03:49 PM, Peter Lieven wrote: >> >> And finally, perhaps you have NX disabled in the bios of one of the >> machines? >> >> What does 'dmesg | grep NX' show on both hosts? >> > > nx was disabled on one of the nodes. That explains the problem. > i will retry the case later today and send info register output. > what is the recommended value for nx (and why)? Enabled (so you get no-execute memory protection). > and why was it working with 2.6.34 and is not with 2.6.35-rc2? We fixed a different bug. But you shouldn't live migrate from a machine with nx to a machine without nx, unless you use -cpu ...,-nx on both nodes. -- error compiling committee.c: too many arguments to function