Re: [KVM timekeeping 10/35] Fix deep C-state TSC desynchronization

From: Glauber Costa
Date: Fri Aug 20 2010 - 13:30:54 EST


On Thu, Aug 19, 2010 at 10:07:24PM -1000, Zachary Amsden wrote:
> When CPUs with unstable TSCs enter deep C-state, TSC may stop
> running. This causes us to require resynchronization. Since
> we can't tell when this may potentially happen, we assume the
> worst by forcing re-compensation for it at every point the VCPU
> task is descheduled.
>
> Signed-off-by: Zachary Amsden <zamsden@xxxxxxxxxx>
Fair enough.

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