linux-kernel - RE: [RFD] Automatic suspend

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Message-ID: <13B9B4C6EF24D648824FF11BE896716203772616FE@dlee02.ent.ti.com>
Date:	Wed, 18 Feb 2009 09:20:02 -0600
From:	"Woodruff, Richard" <r-woodruff2@...com>
To:	Matthew Garrett <mjg@...hat.com>,
	Arjan van de Ven <arjan@...radead.org>
CC:	Brian Swetland <swetland@...gle.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	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

> > 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...
>
> So have userspace say something like "The screen is turned off now,
> change the timer precision on all untrusted userland to sub 10 seconds"?
> That would work.

I also made a similar comment in thread to Arjan yesterday.

He did respond saying there was a pctrl to hit this.  If it's a big list it might be messy.  Unless it can be global.  Probably would be good to look at code rather than speculate.

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