Re: [PATCH v4] x86, sched: Fix the AMD CPPC maximum perf on some specific generations

From: Huang Rui
Date: Thu May 13 2021 - 06:46:37 EST


On Thu, May 13, 2021 at 06:39:08PM +0800, Ingo Molnar wrote:
>
> * Ingo Molnar <mingo@xxxxxxxxxx> wrote:
>
> > No need to send v5, done!
> >
> > I have a system that appears to be affected by this bug:
> >
> > kepler:~> lscpu | grep -i mhz
> > CPU MHz: 4000.000
> > CPU max MHz: 7140.6250
> > CPU min MHz: 2200.0000
> >
> > So I should be able to confirm after a reboot.
>
> 'CPU max Mhz' seems to be saner now:
>
> kepler:~> lscpu | grep -i mhz
>
> CPU MHz: 2200.000
> CPU max MHz: 4917.9678
> CPU min MHz: 2200.0000
>

Yes, happy to know this :-)

Thanks,
Ray