Re: [RFC] Paravirt timer for KVM

Glauber de Oliveira Costa
2007-10-15T18:03:14Z

On 10/15/07, Carsten Otte <cotte-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org> wrote:
> Gerd Hoffmann wrote:
> > With VT you can attempt to make that invisible to the guest using the
> > tsc offset field. Probably svm can do that too (didn't check docs
> > though). kvm-lite can't (what is the status btw?). Xen "solves" that
> > by not doing power management *evil grin*.
> On s390, we've had an instruction for that ever since (store clock),
> that works with an offset field with hardware support. Works great for us.
I've heard s390 also have some special instructions to solve the
halting problem. ;-)

> If VT and SVM can do the same, I'd vote for using it if we can.

I was in the opposite side of gerd: I knew svm did it, not sure about vt ;-)

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Glauber de Oliveira Costa.
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