Re: kvm linux guest hanging for minutes at a time

Thomas Fjellstrom
2011-08-09T14:32:03Z

On August 9, 2011, Avi Kivity wrote:
> On 08/09/2011 03:03 PM, Thomas Fjellstrom wrote:
> > > Your guest isn't using kvmclock for some reason. Is it compiled in
> > > the guest kernel? What are the contents of
> > > /sys/devices/system/clocksource/clocksource0/available_clocksource and
> > > /sys/devices/system/clocksource/clocksource0/current_clocksource (in
> > > the guest filesystem)?
> >
> > Hi, it seems it is using kvm-clock:
> >
> > $ cat /sys/devices/system/clocksource/clocksource0/available_clocksource
> > kvm-clock hpet acpi_pm
> > $ cat /sys/devices/system/clocksource/clocksource0/current_clocksource
> > kvm-clock
>
> Yikes. Please trace such a hang according to
> http://www.linux-kvm.org/page/Tracing.

Does it matter that I have several vms running? Is there a way to limit it to
tracing the single kvm process that's been locking up?