linux-kernel - Re: [RFD] Automatic suspend

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Message-ID: <20090217064630.688bf639@infradead.org>
Date:	Tue, 17 Feb 2009 06:46:30 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	Brian Swetland <swetland@...gle.com>
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Woodruff, Richard" <r-woodruff2@...com>,
	Alan Stern <stern@...land.harvard.edu>,
	Kyle Moffett <kyle@...fetthome.net>,
	Oliver Neukum <oliver@...kum.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Arve Hjønnevåg <arve@...roid.com>,
	Pavel Machek <pavel@....cz>,
	Nigel Cunningham <nigel@...el.suspend2.net>,
	mark gross <mgross@...ux.intel.com>,
	Uli Luckas <u.luckas@...d.de>,
	Igor Stoppa <igor.stoppa@...ia.com>,
	Len Brown <lenb@...nel.org>
Subject: Re: [RFD] Automatic suspend

On Tue, 17 Feb 2009 06:20:01 -0800
Brian Swetland <swetland@...gle.com> wrote:

> Of course that still doesn't address userspace.  Aggressively going to
> suspend lets us compensate for userspace programs that do somewhat
> silly things (I agree that it would be best if they didn't but they
> do and getting *everyone* to write their userspace code to avoid
> spinning or avoid waking up on short-duration timers to poll is a
> losing battle).

actually with powertop... on the open source side things are actually
won. It took all of 6 months...
I don't see that as a valid excuse. In fact, if this kind of solution
makes real userspace scheduled timers to be missed then I consider it a
serious functionality misfeature.


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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