Date: Wed, 13 Jan 2010 22:07:55 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Arjan van de Ven <arjan@infradead.org>
Cc: linux-kernel@vger.kernel.org, tglx@tglx.de, mingo@elte.hu,
       Cyrill Gorcunov <gorcunov@gmail.com>,
       Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH] timers: Introduce the concept of timer slack for legacy
 timers
Message-Id: <20100113220755.7ad6286f.akpm@linux-foundation.org>
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	<20100113135219.f7e8a2f9.akpm@linux-foundation.org>
	<20100113214528.41e2de4a@infradead.org>
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On Wed, 13 Jan 2010 21:45:28 -0800 Arjan van de Ven <arjan@infradead.org> wrote:

> On Wed, 13 Jan 2010 13:52:19 -0800
> Andrew Morton <akpm@linux-foundation.org> wrote:
> 
> > I suppose this could be inlined.
> 
> .. and then I expand it a bit in a few weeks and guess who complains an
> inline gets too big ? ;-)
> 

Me!

You're proposing that we include trivially-fixed overhead to every
Linux machine in the world to save ourselves 15 minutes effort?  Nope,
bad tradeoff.

> > 
> > But the set_timer_slack() interface has no callers.  Perhaps it
> > should?
> 
> I have some callers pending, and I thought I posted those to lkml but
> maybe I did not.

hm.

Have you any feeling for how much power this sort of thing saves?  I
guess "change in interrupts per minute" would be easy to measure.
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