linux-kernel - Re: [RFD] Automatic suspend

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Message-ID: <20090217065622.3e0a9956@infradead.org>
Date:	Tue, 17 Feb 2009 06:56:22 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Brian Swetland <swetland@...gle.com>,
	"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 14:51:41 +0000
Matthew Garrett <mjg59@...f.ucam.org> wrote:

> On Tue, Feb 17, 2009 at 06:46:30AM -0800, Arjan van de Ven wrote:
> 
> > 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.
> 
> Remember that Android has an open marketplace designed to appeal to
> Java programmers - users are going to end up downloading code from
> there and then blaming the platform if their battery life heads
> towards zero. I think "We can't trust our userland not to be dumb" is
> a valid concern.

so use range timers / timer slack for those apps that you do not trust.
That is not a big deal, and solves the issue of timer wakeups...


-- 
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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