From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matt Mullins Subject: Re: Live migration locks up 3.2 guests in do_timer(ticks ~ 500000) Date: Tue, 9 Sep 2014 23:53:49 -0700 Message-ID: <20140910065349.GM23305@hydra.tuxags.com> References: <20140908055416.GE23305@hydra.tuxags.com> <540D663E.2070905@redhat.com> <20140908155642.GF23305@hydra.tuxags.com> <540DD6E6.70409@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: kvm@vger.kernel.org To: Paolo Bonzini Return-path: Received: from hydra.tuxags.com ([64.13.172.54]:50473 "EHLO mail.tuxags.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750867AbaIJGxt (ORCPT ); Wed, 10 Sep 2014 02:53:49 -0400 Content-Disposition: inline In-Reply-To: <540DD6E6.70409@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On Mon, Sep 08, 2014 at 06:18:46PM +0200, Paolo Bonzini wrote: > Il 08/09/2014 17:56, Matt Mullins ha scritto: > >> > What host are you running? > > What information do you want that I missed in my first email? > > What version of QEMU? Can you try the 12.04 qemu (which IIRC is 1.0) on > top of the newer kernel? I did reproduce this on qemu 1.0.1. What would you like me to test next? I've got both VM hosts currently running 3.17-rc4, so I'll know tomorrow if that works. I've been looking into this off-and-on for a while now, and this time around I may have found other folks experiencing the same issue: https://issues.apache.org/jira/browse/CLOUDSTACK-6788 That one's a little empty on the details (do y'all know more about to whom that bug was "known" than I do?), but https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1297218 sees similar symptoms due to running NTP on the host. I may try disabling that after the current round of testing-3.17-rc4 finishes up.