linux-kernel - Re: [PATCH] p4-clockmod: Calculate frequency based on TSC value for P4 models 0 and 1

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Message-Id: <200902241813.02252.elendil@planet.nl>
Date:	Tue, 24 Feb 2009 18:13:00 +0100
From:	Frans Pop <elendil@...net.nl>
To:	Dave Jones <davej@...hat.com>
Cc:	Mattias-Christian Ott <ott@...ix.org>,
	Dominik Brodowski <linux@...do.de>,
	Joerg Platte <jplatte@...sa.net>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	cpufreq@...r.kernel.org
Subject: Re: [PATCH] p4-clockmod: Calculate frequency based on TSC value for P4 models 0 and 1

On Tuesday 24 February 2009, Dave Jones wrote:
> On Tue, Feb 24, 2009 at 08:08:58AM +0100, Frans Pop wrote:
>  > From: Mattias-Christian Ott <ott@...ix.org>
>  >
>  > Commit ed9cbcd40004904dbe61ccc16d6106a7de38c998 reverted an
>  > incorrect change that resulted in random frequencies being displayed
>  > in some cases for early P4 models because the MSR_FBC_REGISTER_ID
>  > ratio is undefined.
>  >
>  > Result of the revert is that for some users the CPU frequency is
>  > displayed multiplied by a factor 8 in /proc/cpuinfo when p4-clockmod
>  > is loaded.
>  >
>  > Calculating the frequency from the TSC value should work in all
>  > cases.
>
> I already picked this up in cpufreq-next.

OK, thanks. The status of the patch was somewhat unclear as, from what I 
could see in bugzilla, it had been submitted well before the merge window 
for .29 was opened. Good to know it's in the pipeline.
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