linux-kernel - Re: [PATCH] cpufreq: Change link order of x86 cpufreq modules

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Message-ID: <20090218190943.GF26802@elte.hu>
Date:	Wed, 18 Feb 2009 20:09:43 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	davej@...emonkey.org.uk, linux-kernel@...r.kernel.org,
	cpufreq@...r.kernel.org
Subject: Re: [PATCH] cpufreq: Change link order of x86 cpufreq modules


* Matthew Garrett <mjg59@...f.ucam.org> wrote:

> On Wed, Feb 18, 2009 at 07:31:37PM +0100, Ingo Molnar wrote:
> 
> > Nice fix! Where does this information come from? Distro module 
> > ordering magic? It's rather non-trivial.
> 
> Pretty much. p4-clockmod is never the preferred option because 
> it does no voltage scaling. speedstep-centrino is now almost 
> entirely functionally replaced with acpi-cpufreq. The 
> powernow-k8 issue was a personal communication from davej.

I'm wondering whether that priority order should/could be 
expressed in the module space too - so that distros wouldnt have 
to replicate this. This is really a piece of information the 
kernel is best at maintaining.

> > (small style nit: the first line in the Makefile is overlong.)
> 
> Seems to be 79 characters?

[ oops, my eye-guesstimator is failing me :) ]

	Ingo
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