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Date: Tue, 24 Jan 2012 23:51:24 +0000
From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>, Ingo Molnar <mingo@elte.hu>,
        Linus Torvalds <torvalds@linux-foundation.org>,
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        Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [GIT PULL] RCU changes for v3.3
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On Tue, Jan 24, 2012 at 02:43:45PM -0800, Paul E. McKenney wrote:
> On Tue, Jan 24, 2012 at 10:07:00PM +0000, Mark Brown wrote:
> > On Tue, Jan 24, 2012 at 01:11:37PM -0800, Paul E. McKenney wrote:

> > > Hmmm...  Residual power dissipation is given in milliwatts.  I could
> > > imagine some heartburn from many of the more aggressive embedded folks,
> > > given that they might prefer microwatts -- or maybe even nanowatts,
> > > for all I know.

> > FWIW idle battery referenced draw from a modern smartphone will be in
> > the low single digit miliwatts or so.

> Ah, OK, so only the non-smart cellphones would care, but they generally
> don't run Linux, from what I understand.  Thanks for the info!

Well, that depends.  Anything you're actually accomplishing when you're
optimising at that level is at the less than a milliwatt level.