[Qemu-devel] qemu-kvm 0.14.0 and clocksource=acpi_pm

[Peter Lieven]

Hi,

i'm currently testing qemu-kvm 0.14.0 in conjunction with Linux 2.6.38 
on the host system.

As there are some old kernels out that support kvm_clock but not 
reliably we used to run some
of them with clocksource=acpi_pm.

However, on this new combination of qemu-kvm and linux kernel I see the 
following message
in the guests:

Override clocksource acpi_pm is not HRT compatible. Cannot switch while in
HRT/NOHZ mode



This used to work with qemu-kvm 0.12.5 and linux 2.6.34.

The guest is Ubuntu LTS 10.04.2 64-bit.

Has anyone a clue?

Additionally it would be great if someone who knows definetely would say 
from with kernel
on clocksource=kvm_clock is stable (especially in conjunction with live 
migration)

BR,
Peter