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From: Timothy Covell <timothy.covell@ashavan.org>
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To: Martin Wilck <Martin.Wilck@fujitsu-siemens.com>,
        Linux Kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH]: Fix MTRR handling on HT CPUs (improved)
Date: Fri, 25 Jan 2002 15:30:22 -0600
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Cc: Richard Gooch <rgooch@atnf.csiro.au>,
        Martin Wilck <Martin.Wilck@fujitsu-siemens.com>,
        Marcelo Tosatti <marcelo@conectiva.com.br>,
        Linus Torvalds <torvalds@transmeta.com>
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On Thursday 24 January 2002 14:57, Martin Wilck wrote:
> On Intel processors with "Jackson" technology (also HT, HyperThreading),
> two logical processors share certain registers, in particular the MTRR
> registers. The Linux way of manipulating these registers may lead to
> inconsistent MTRR settings or total disabling of cache.

I thought that Intel was purposely downplaying HT support on the
processors due to performance issues  and M$ didn't support it
likewise.  Is this another case of Linux being out in the front of things?
Are you to a point that you can benchmark it and recommend when
to enable it or not?

-- 
timothy.covell@ashavan.org.
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