[Spice-devel] Current qemu-master hangs when used with qxl + linux guest

[Daniel P. Berrange]

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
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