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

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Message-ID: <86802c440802070056o215e97b0u945a08b12dca8d2@mail.gmail.com>
Date:	Thu, 7 Feb 2008 00:56:06 -0800
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Balaji Rao" <balajirrao@...il.com>, linux-kernel@...r.kernel.org,
	"Thomas Gleixner" <tglx@...utronix.de>, jesse.barnes@...el.com,
	ak@...e.de
Subject: Re: [PATCH][Regression] x86, 32-bit: trim memory not covered by wb mtrrs - FIX

On Feb 7, 2008 12:02 AM, Ingo Molnar <mingo@...e.hu> 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)

then title for patch is not right
> >     x86, 32-bit: trim memory not covered by wb mtrrs

should be

x86_64: trim memory not covered by wb mtrrs

anyway, we can not modify git log in linux-2.6.git. can we?

YH
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