From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Fjellstrom Subject: Re: one out of four existing kvm guest's not starting after system upgrade Date: Sat, 18 Feb 2012 01:53:27 -0700 Message-ID: <201202180153.27122.thomas@fjellstrom.ca> References: <201202172149.36904.thomas@fjellstrom.ca> <4F3F63B0.4060305@web.de> <201202180150.39098.thomas@fjellstrom.ca> Reply-To: thomas@fjellstrom.ca Mime-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Cc: KVM To: Jan Kiszka Return-path: Received: from mail.tomasu.net ([64.85.170.232]:47924 "EHLO mail.tomasu.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752322Ab2BRIxi (ORCPT ); Sat, 18 Feb 2012 03:53:38 -0500 In-Reply-To: <201202180150.39098.thomas@fjellstrom.ca> Sender: kvm-owner@vger.kernel.org List-ID: On Sat Feb 18, 2012, Thomas Fjellstrom wrote: > On Sat Feb 18, 2012, Jan Kiszka wrote: > > On 2012-02-18 05:49, Thomas Fjellstrom wrote: > > > I just updated my kvm host, kernel upgraded from 2.6.38 up to 3.2, and > > > qemu+qemu-kvm updated (not sure from what to what). But after the > > > upgrade, one of my guests will not start up. It gets stuck with 60-80% > > > cpu use, almost no memory is allocated by qemu/kvm, and no output of > > > any kind is seen (in the host console, or a bunch of the guest output > > > options like curses display, stdio output, virsh console, vnc or sdl > > > output). I normally use libvirt to manage the guests, but I've > > > attempted to run qemu manually, and have the same problems. > > > > > > What can cause this? > > > > > > Just tested booting back into the old kernel, the one guest still won't > > > start, while the rest do. I'm thoroughly confused. > > > > You mean if you only update qemu-kvm, the problem persists, just with > > lower probability? In that case, we definitely need the version of your > > current qemu-kvm installation. Also, it would be nice to attach gdb to > > the stuck qemu-kvm process, issuing a "thread apply all backtrace" in > > that state. > > > > Jan > > Sorry I wasn't clear. If I just update qemu-kvm (And qemu with it, and not > the kernel), it always just hangs on load. where "it" is the one vm I mentioned before. Three others are just fine. The stranger bit, is I'm pretty sure I created them all at the same time, in very similar ways. At the very least the libvirt config for them all are near identical. [snip] -- Thomas Fjellstrom thomas@fjellstrom.ca