Re: [patch] sched: fix scheduling latencies in mtrr.c

Zwane Mwaikambo
2004-09-14T18:38:06Z

On Tue, 14 Sep 2004, Ingo Molnar wrote:

>
> > fix scheduling latencies in the MTRR-setting codepath.
> > Also, fix bad bug: MTRR's _must_ be set with interrupts disabled!
>
> patch attached ...
>
> caveat: one of the wbinvd() removals is correct i believe, but the other
> one might be problematic. It doesnt seem logical to do a wbinvd() at
> that point though ...

Just a data point, Volume 3 "MTRR considerations in MP systems" states
that the second wbinvd() isn't required for P6 and Pentium 4 but might be
necessary for future systems.

Zwane