From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: Migration fail randomly Date: Tue, 15 Sep 2015 15:24:35 +0200 Message-ID: <55F81C13.1030608@redhat.com> References: <0b22092e744126a8de6e0b391bdb5081@roedie.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit To: Sander Klein , KVM list Return-path: Received: from mail-wi0-f174.google.com ([209.85.212.174]:37968 "EHLO mail-wi0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751573AbbIONYm (ORCPT ); Tue, 15 Sep 2015 09:24:42 -0400 Received: by wiclk2 with SMTP id lk2so27269997wic.1 for ; Tue, 15 Sep 2015 06:24:40 -0700 (PDT) In-Reply-To: <0b22092e744126a8de6e0b391bdb5081@roedie.nl> Sender: kvm-owner@vger.kernel.org List-ID: On 15/09/2015 12:57, Sander Klein wrote: > > I'm running Debian Jessie with KVM 2.1 on 6 nodes with an NFS3 back-end > and sometimes when I migrate a VM it suddenly 'hangs'. The KVM process > is running on the new node, eating up all it's CPU cycles but it does > not respond to anything anymore. I don't see any errors logged and it > seems like the migration went fine except for the VM hanging. > > It doesn't matter if I do a live migrate or a save and restore, it > happens with both ways. > > Destroying and booting the VM fixes it of course and I can migrate it > afterwards, but after a couple of days the same happens again when I try > to migrate it. > > The VM's range from Debian Squeeze (With a 3.2 kernel), Wheezy, and Jessie. > > Does anyone have an idea why this happens and if I can fix this? What kernel runs in the host? Paolo