Re: [RFC] Paravirt timer for KVM

Hollis Blanchard
2007-10-12T19:48:27Z

On Fri, 2007-10-12 at 13:08 -0300, Glauber de Oliveira Costa wrote:
> +config KVM_CLOCK
> + bool "KVM paravirtualized clock"
> + depends on PARAVIRT && GENERIC_CLOCKEVENTS
> + help
> + Turning on this option will allow you to run a paravirtualized clock
> + when running over the KVM hypervisor. Instead of relying on a PIT
> + (or probably other) emulation by the underlying device model, the host
> + provides the guest with timing infrastructure, as time of day, and
> + timer expiration.

I must have missed earlier discussion on this topic, so I'm left
wondering... what's the point? What's wrong with PIT (et al) emulation?

--
Hollis Blanchard
IBM Linux Technology Center