Re: [PATCH]: Fix MTRR handling on HT CPUs (improved)

Dave Jones (davej@suse.de)
Fri, 25 Jan 2002 19:57:06 +0100 (CET)


On Fri, 25 Jan 2002, Alan Cox wrote:

> > just not do it on the right CPU (you're _not_ supposed to read to see if
> > you are writing the same value: MTRR's can at least in theory have
> > side-effects, so it's not the same check as for the microcode update).
> So why not just set it twice - surely that is harmless ? Why add complex
> code ?

I wondered the same thing of the microcode changes.
Since for the commoncase (ie, non-HT) it now has the side-effect of
doing this..

microcode: CPU0 updated from revision 7 to 7, date-10151999

which looks odd in comparison to the old "already current" msg.

-- 
| Dave Jones.        http://www.codemonkey.org.uk
| SuSE Labs

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