linux-kernel - Re: [PATCH][Regression] x86, 32-bit: trim memory not covered by wb mtrrs

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Date:	Thu, 7 Feb 2008 13:51:02 +0530
From:	Balaji Rao <balajirrao@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	jesse.barnes@...el.com, yhlu.kernel@...il.com, ak@...e.de,
	Yinghai Lu <yinghai.lu@....com>
Subject: Re: [PATCH][Regression] x86, 32-bit: trim memory not covered by wb mtrrs - FIX

On Thursday 07 February 2008 01:32:45 pm Ingo Molnar wrote:
> * Balaji Rao <balajirrao@...il.com> wrote:
> > Hello,
> >
> > The following commit caused my X server to stop working.
> >
> > commit 99fc8d424bc5d803fe92cad56c068fe64e73747a
> > Author: Jesse Barnes <jesse.barnes@...el.com>
> > Date:   Wed Jan 30 13:33:18 2008 +0100
> >
> >     x86, 32-bit: trim memory not covered by wb mtrrs
> >
> > This patch fixes the improper handling of addresses > 4G by
> > mtrr_trim_uncached_memory. This, now brings up X on my system.
>
> thanks. Incidentally this same bug was reported and fixed yesterday, and
> that fix is upstream already. Could you please compare your solution to
> Yinghai Lu's fix below, and send us a patch for any further improvements
> (or cleanups) you might notice in that code? It seems to be almost the
> same fix as yours. (and hopefully it fixes your X problem too)

Cool! Yes, Yinghai Lu's patch indeed is the same as mine and its really 
surprising that we've used the same variable name too! :)

regards,
balaji rao
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