Re: [RFC PATCH] PM: Introduce generic DVFS framework with device-specific OPPs

From: Greg KH <gregkh@suse.de>
To: "Jiejing.Zhang " <kzjeef@gmail.com>
Cc: Nishanth Menon <nm@ti.com>, Len Brown <len.brown@intel.com>,
	Kevin Hilman <khilman@deeprootsystems.com>,
	Kyungmin Park <kyungmin.park@samsung.com>,
	MyungJoo Ham <myungjoo.ham@samsung.com>,
	linux-pm@lists.linux-foundation.org
Subject: Re: [RFC PATCH] PM: Introduce generic DVFS framework with device-specific OPPs
Date: Tue, 26 Apr 2011 13:54:30 -0700	[thread overview]
Message-ID: <20110426205430.GA20381@suse.de> (raw)
In-Reply-To: <BANLkTi=VFPZinH+1x0xBTP9o_s6+2gsA7w@mail.gmail.com>

On Tue, Apr 26, 2011 at 10:45:18PM +0800, Jiejing.Zhang  wrote:
> Hi Greg,
> 
> I think DVFS here means “Dynamic voltage and frequency scaling”,  refering the
> first google's result:

Ok, if so, please spell it out.

Also, don't use 'dvfs' as a prefix in the kernel, too many other people
will think it is a filesystem.  How about "dynvolt"?

Or anything else, just no 'fs' in the name otherwise confusion will
reign.

> a dynamic voltage and frequency scaling (DVFS) *technique that minimizes the
> total system energy consumption for performing a task while satisfying
> a given execution time constraint. We first show that in order to
> guarantee minimum energy for task execution by using DVFS it is
> essential to divide the system power into active and standby power
> components. Next, we present a new DVFS technique, which considers not
> only the active power, but also the standby component of the system
> power.

Please put this in the changelog entry, you need to explain it to those
of us who have never seen it.

thanks,

greg k-h
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