From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40617) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VTYJP-0004DG-5U for qemu-devel@nongnu.org; Tue, 08 Oct 2013 10:31:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VTYJK-0007Hs-BR for qemu-devel@nongnu.org; Tue, 08 Oct 2013 10:30:59 -0400 Received: from mx1.redhat.com ([209.132.183.28]:1811) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VTYJK-0007Hi-2b for qemu-devel@nongnu.org; Tue, 08 Oct 2013 10:30:54 -0400 Date: Tue, 8 Oct 2013 15:30:49 +0100 From: "Daniel P. Berrange" Message-ID: <20131008143049.GK14446@redhat.com> References: <5254165A.2050304@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <5254165A.2050304@redhat.com> Subject: Re: [Qemu-devel] [Spice-devel] Current qemu-master hangs when used with qxl + linux guest Reply-To: "Daniel P. Berrange" List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Hans de Goede Cc: spice-devel , "qemu-devel@nongnu.org" On Tue, Oct 08, 2013 at 04:27:38PM +0200, Hans de Goede wrote: > Hi All, > > I'm having this weird problem with qemu master + spice/qxl using > guests. As soon as the guest starts Xorg, I get the following message > from qemu: > > main-loop: WARNING: I/O thread spun for 1000 iterations > > And from then on the guest hangs and qemu consumes 100% cpu. The qemu > console still works, and I can quit qemu that way. > > Doing ctrl+c + a thread apply all bt in qemy shows one cpu thread waiting > for the iothread-lock, and all other threads waiting in poll. > > This happens both with non kms guests (tried RHEL-6.5, older Fedoras) > as well as with kms guests (tried a fully up2date F-19). > > Since I've not seen any similar reports, I assume it is something > with my setup ... > > I've tried changing various things: > -removing the spice agent channel > -changing the number of virtual cpus (tried 1 and 2 virtual cpus) > -upgrading spice-server to the latest git master > > But all to no avail. > > This is with qemu-master build from source on a fully up2date > F-20 system, using the F-20 seabios files. > > If someone has any clever ideas I'll happily try debugging this further. Does the QEMU build in F20 work correctly ? If so that'd give you a starting point from which to 'git bisect' the problem. Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|