Re: [PATCH v2 2/3] x86, sched: Bail out of frequency invariance if turbo frequency is unknown

From: Ira Weiny
Date: Mon Jul 06 2020 - 16:19:59 EST


On Mon, Jun 01, 2020 at 04:34:18PM -0700, Ricardo Neri wrote:
> On Sun, May 31, 2020 at 08:24:52PM +0200, Giovanni Gherdovich wrote:
> > There may be CPUs that support turbo boost but don't declare any turbo
> > ratio, i.e. their MSR_TURBO_RATIO_LIMIT is all zeroes. In that condition
> > scale-invariant calculations can't be performed.
> >
> > Signed-off-by: Giovanni Gherdovich <ggherdovich@xxxxxxx>
> > Suggested-by: Ricardo Neri <ricardo.neri-calderon@xxxxxxxxxxxxxxx>
>
> FWIW,
>
> Tested-by: Ricardo Neri <ricardo.neri-calderon@xxxxxxxxxxxxxxx>

Is this going to make it as a fix to 5.8?

Tested-by: Ira Weiny <ira.weiny@xxxxxxxxx>