linux-kernel - Re: mtrr cleanup not doing anything on 2.6.33-rc7

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Message-ID: <20100211101013.GA4892@Pilar.aei.mpg.de>
Date:	Thu, 11 Feb 2010 11:10:13 +0100
From:	"Carlos R. Mafra" <crmafra2@...il.com>
To:	Alexander Lam <lambchop468@...il.com>
Cc:	linux-kernel@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: mtrr cleanup not doing anything on 2.6.33-rc7

[Add people in that commit to Cc: list, just in case]

On Mi 10.Feb'10 at 20:48:49 -0500, Alexander Lam wrote:
> On Wed, Feb 10, 2010 at 3:02 PM, Alexander Lam <lambchop468@...il.com> wrote:
> >
> > My kernel config has the following:
> > CONFIG_MTRR=y
> > CONFIG_MTRR_SANITIZER=y
> > CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1
> > CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
> >
> > With previous kernels, dmesg would show that the sanitizer was indeed
> > cleaning up the mtrrs [1]
> >
> > but now, with 2.6.33-rc7 there is no indication that this is occuring,
> 
> For those who run across this later,
> 
> Found out that commit 508d85c2c6bc8cba53d2a54d9a306ad64a0a80bf,
>    x86: When cleaning MTRRs, do not fold WP into UC
> 
> causes mtrr cleanup not to run on my machine.
> 
> Probably not worth fixing because the i915 error message is harmless.
> --
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