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Date: Tue, 3 Dec 2002 21:00:19 +0100
From: Dominik Brodowski <linux@brodo.de>
To: Hollis Blanchard <hollis@austin.ibm.com>
Cc: Arjan van de Ven <arjanv@redhat.com>, Bishop Brock <bcbrock@us.ibm.com>,
       linux-kernel@vger.kernel.org, cpufreq@www.linux.org.uk,
       linux-pm-devel@lists.sourceforge.net
Subject: Re: [Linux-pm-devel] Re: IBM/MontaVista Dynamic Power Management Project
Message-ID: <20021203200019.GD1340@brodo.de>
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On Tue, Dec 03, 2002 at 12:27:03PM -0600, Hollis Blanchard wrote:
> On Tue, 2002-12-03 at 11:57, Arjan van de Ven wrote:
> > On Tue, 2002-12-03 at 18:46, Bishop Brock wrote:
> > > IBM and MontaVista have initiated a joint project to develop a
> > > dynamic power management control and policy mechanism for Linux
> > > for processors supporting dynamic voltage and frequency scaling.

Great!

> > > A paper describing the proposal can be obtained from
> > > 
> > > http://www.research.ibm.com/arl/projects/dpm.html
> > > 
> > > A working prototype of the proposed framework for
> > > the IBM PowerPC 405LP processor exists and will be made
> > > public in the near future.
> > 
> > any idea if/how this will fit into the existing cross platform cpufreq
> > framework ?
> 
> It subsumes it, similar to Dominik's ideas in "[RFC] Dynamic Frequency
> and Voltage Scaling Infrastructure" (on the cpufreq list). The idea is
> that you want scaling events to be generated by the kernel rather than
> only scaling on userland input. The paper (and Dominik's mail) give you
> some ideas of when and why...

So, will it basically be a "policy governor" as described in my "[RFC]" mail?
Or does it need other enhancements in the cpufreq core? 

BTW, have you noticed the premilinary patch I which implements most of the 
DVS infrastructure mentioned in my mail to the cpufreq list yesterday?

	Dominik
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