linux-kernel - Re: [RFD] Automatic suspend

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Message-ID: <20090219215631.GA23925@bulgaria.corp.google.com>
Date:	Thu, 19 Feb 2009 13:56:31 -0800
From:	Brian Swetland <swetland@...gle.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Arve Hjønnevåg <arve@...roid.com>,
	"Woodruff, Richard" <r-woodruff2@...com>,
	Arjan van de Ven <arjan@...radead.org>,
	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>, Pavel Machek <pavel@....cz>,
	Nigel Cunningham <nigel@...el.suspend2.net>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	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

["Rafael J. Wysocki" <rjw@...k.pl>]
> 
> > It might have to be platform-specific.  The Android people seem to have a
> > pretty good idea of what criteria will work for them.
> 
> I'd really like to know in what situations Androind is supposed to suspend
> automatically.

Currently, whenever the display is off (after the user-selectable
timeout), we aggressively enter suspend -- wakelocks are used to prevent
suspend when a driver or userspace entity needs the CPU to actually be
awake.

Brian
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