linux-kernel - Re: [PATCH 3/3] cpufreq: add sysfs knob for toggling core performance boost

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Message-ID: <20100304214921.GB29002@aftab>
Date:	Thu, 4 Mar 2010 22:49:21 +0100
From:	Borislav Petkov <borislav.petkov@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Mark Langsdorf <mark.langsdorf@....com>,
	<linux-kernel@...r.kernel.org>, <cpufreq@...r.kernel.org>,
	<bhavna.sarathy@....com>, <joachim.deguara@....com>
Subject: Re: [PATCH 3/3] cpufreq: add sysfs knob for toggling core
 performance boost

From: Andrew Morton <akpm@...ux-foundation.org>
Date: Thu, Mar 04, 2010 at 01:27:43PM -0800

> The lack of any changelog in a patch is usually a good sign that the
> patch needs a changelog :(

See my earlier mail.

[..]

> Well I've read the code and I've read the code comments and I've read
> the changelogs and I still have no clue what this thing does. 
> Apparently it allows me to toggle something called "APERF/MPERF".  I
> guess if I were patient enough, teh goog might tell me what that is,
> and why I might want it.  But this is all terribly inefficient.
> 
> I think you'd find that your feature is more useful and will be used by
> more people if you tell them (and us) what it does.

Basically, this is a knob for toggling of a core boosting feature
we have in Fam10h, rev.E CPUs. I'll have a proper changelog with a
hopefully understandable explanation soon :).

Thanks.

-- 
Regards/Gruss,
Boris.

-
Advanced Micro Devices, Inc.
Operating Systems Research Center

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