[fedora-virt] Idle VM is hogging host cpu

[Richard W.M. Jones]

On Mon, Nov 08, 2010 at 04:00:09AM +0100, Dennis Jacobfeuerborn wrote:
> Hi,
> I just migrated from Fedora 11 to Fedora 14 (via a fresh install) and so 
> far everything seems fine kvm seems to have major issues.
> After starting one Centos 5 VM qemu-kvm keeps using 20% of the cpu 
> according to top even though the VM is completely idle. Does anyone have a 
> clue what might cause this because I wasn't seeing this behavior under 
> Fedora 11.

Another interesting thing for you to post would be precisely what
version of CentOS the guest is running.  Guest kernel?  Is the guest
using pv-clock[1]?  Is it using virtio drivers?

Rich.

[1] cat /sys/devices/system/clocksource/clocksource0/current_clocksource

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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