Re: [Qemu-devel] [PATCH 2/3] qemu-x86: Add tsc_freq option to -cpu

[Avi Kivity]

On 07/19/2011 04:54 PM, Avi Kivity wrote:
> On 07/19/2011 04:30 PM, Joerg Roedel wrote:
> > >
> > >  (although we've been talking about starting a naked qemu and 
> > pushing all
> > >  of the configuration from the source).
> >
> > Hmm, I planned to do the VMSTATE thing in a follow-on patch-set. The
> > plan is to read the VCPU tsc_freq at guest start time on !tsc-scale
> > hosts and migrate it over so that the destination host can set the
> > tsc-freq if it supports tsc-scaling.
>
> This can be done by a management tool if desired.

Although, if we do this unconditionally (that is, also for tsc-scale 
hosts) then we get stable tsc even without supplying a tsc frequency 
argument... need to think about this.

--
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