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

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Date:	Mon, 3 Mar 2008 18:05:35 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
cc:	Pierre Ossman <drzeus-list@...eus.cx>,
	LKML <linux-kernel@...r.kernel.org>,
	Adam Belay <abelay@...ell.com>,
	Andi Kleen <andi@...stfloor.org>,
	Lee Revell <rlrevell@...-job.com>,
	<linux-pm@...ts.linux-foundation.org>
Subject: Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors

On Mon, 3 Mar 2008, Pallipadi, Venkatesh wrote:

> But, with this patch:
> - we are penalizing good hardware and making them less power efficient
> to match the bad ones.
> - There may also be server systems which first may not have these sort
> of power fluctuations and even when buggy and have this noise, system
> may be in some corner of some lab with fans making more noise than the
> capacitors.

Can you make it configurable through sysfs?  Default to disabled, but 
allow the user to turn it on if the machine makes too much noise.

Alan Stern

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