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Message-ID: <20080304040048.GA31562@codemonkey.org.uk>
Date: Mon, 3 Mar 2008 23:00:48 -0500
From: Dave Jones <davej@...emonkey.org.uk>
To: Andi Kleen <andi@...stfloor.org>
Cc: Alan Stern <stern@...land.harvard.edu>,
"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
Pierre Ossman <drzeus-list@...eus.cx>,
LKML <linux-kernel@...r.kernel.org>,
Adam Belay <abelay@...ell.com>,
Lee Revell <rlrevell@...-job.com>,
linux-pm@...ts.linux-foundation.org
Subject: Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors
On Tue, Mar 04, 2008 at 12:10:33AM +0100, Andi Kleen wrote:
> On Mon, Mar 03, 2008 at 06:05:35PM -0500, Alan Stern wrote:
> > 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?
>
> It already is, through a writable module_parm()
>
> > Default to disabled, but
> > allow the user to turn it on if the machine makes too much noise.
>
> 99+% of the users wouldn't be able to figure that out.
99+% of users don't have singing capacitors. (Or don't care enough to complain)
For those that do can't figure out what to do from google,
we have a documentation problem.
Dave
--
http://www.codemonkey.org.uk
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