linux-kernel - Re: amd64 + mtrr: only 3.1gb of 8gb are covered, kernel 2.6.30 and earlier.

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Message-Id: <200908231111.26414.volkerarmin@googlemail.com>
Date:	Sun, 23 Aug 2009 11:11:26 +0200
From:	Volker Armin Hemmann <volkerarmin@...glemail.com>
To:	Yinghai Lu <yhlu.kernel@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: amd64 + mtrr: only 3.1gb of 8gb are covered, kernel 2.6.30 and earlier.

On Sonntag 23 August 2009, Yinghai Lu wrote:
> On Sat, Aug 22, 2009 at 12:26 PM, Volker Armin
>
> Hemmann<volkerarmin@...glemail.com> wrote:
> > when I went from 4gb to 6gb I had a performance degradation. Since the
> > 8gb are faster and the new cpu is faster, I don't see degradation. But I
> > wonder how much better performance could be with 'correct' mtrr.
>
> that is weird. with 4g should have mem hole remapping.
>
> do you still have /proc/mtrr for 6g setup?
>
> YH

I have it here:
http://marc.info/?l=linux-kernel&m=124336823415460&w=2

Glück Auf,
Volker
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