[ovirt-users] QEMU hangup with SPICE console

[Markus Stockhausen]

> Von: Michal Skrivanek [michal.skrivanek at redhat.com]
> Gesendet: Donnerstag, 22. Mai 2014 13:17
> An: Markus Stockhausen
> Cc: ovirt-users
> Betreff: Re: [ovirt-users] QEMU hangup with SPICE console
> 
> On 22 May 2014, at 08:48, Markus Stockhausen wrote:
> 
> > Hello,
> >
> >
> > our hypervisor nodes are running on FC19. virt-preview repos is activated.
> > Windows VMs are using SPICE protocol.
> >
> > From time to time we see hangups of the windows machines. QEMU
> > has 100% CPU and a perf report gives the following output:
> >
> > Samples: 70K of event 'cycles', Event count (approx.): 49527366887
> >
> > 51,76%  qemu-system-x86  libspice-server.so.1.8.0  [.] 0x000000000005a6e8
> > 41,15%  qemu-system-x86  [vdso]                    [.] 0x0000000000000701
> >  2,09%  qemu-system-x86  libc-2.17.so              [.] clock_gettime
> >  1,10%  qemu-system-x86  libspice-server.so.1.8.0  [.] pthread_self at plt
> >  0,60%  qemu-system-x86  libpthread-2.17.so        [.] pthread_self
> >  0,53%  qemu-system-x86  libspice-server.so.1.8.0  [.] clock_gettime at plt
> >  0,27%  qemu-system-x86  qemu-system-x86_64        [.] 0x00000000001d6238
> > ...
> >
> > No SPICE client is connected to the VM.
> > Any idea how to isolate the error better?
> 
> disable spice i suppose resolve this
> how about qxl drivers? installed or not?
> definitely check on spice and/or qemu list…

installed spice debuginfo and got more details. Reason seems to be
this bug: http://cgit.freedesktop.org/spice/spice/commit/?id=4019a8801d7a67035749562c0c1f403c24f36b0b

As the CPU consumption is quite nasty I advise anyone who gets similar issues
on FC19 nodes to jump onto FC20. spice-server 0.12.5 including the bugfix has 
been pushed to the testing repos and should be available the next weeks.

https://admin.fedoraproject.org/updates/FEDORA-2014-6559/spice-0.12.5-2.fc20

Markus
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