Re: Enabling RDPMC in user space by default

Andi Kleen
2005-11-29T16:15:51Z

>
> > It would be actually a good idea to disable RDTSC in ring 3 too
> > (because user space usually doesn't have enough information to make
> > good use of it and gets it wrong), but I fear that will break
> > too many applications right now.
> >
>
> FWIW, I agree here. We lock down the power state and still use RDTSC for
> some timing things.

You should replace that with RDPMC 0 once I did the change IMHO.

-Andi