linux-kernel - Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors

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Message-ID: <20080305173212.GA12629@one.firstfloor.org>
Date:	Wed, 5 Mar 2008 18:32:12 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Pierre Ossman <drzeus-list@...eus.cx>
Cc:	Andi Kleen <andi@...stfloor.org>,
	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	Dave Jones <davej@...emonkey.org.uk>,
	Alan Stern <stern@...land.harvard.edu>,
	LKML <linux-kernel@...r.kernel.org>,
	Adam Belay <abelay@...ell.com>,
	Lee Revell <rlrevell@...-job.com>,
	linux-pm@...ts.linux-foundation.org, Pavel Machek <pavel@....cz>
Subject: Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors

> But I don't use jiffies in the idle exit path, only the entry path.

On entry jiffies should be always uptodate. Only on exit there
is the small code window where it isn't.

> > Action: Test if it works
> > Check: If test succeeded exit 
> > Otherwise: Restart at Start
> > 
> 
> Now you're just being a smart-ass. :)

Well you asked for pseudo code ...

-Andi
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