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Date: Thu, 19 Feb 2009 13:56:31 -0800
From: Brian Swetland <swetland@google.com>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Alan Stern <stern@rowland.harvard.edu>,
       Arve =?iso-8859-1?B?SGr4bm5lduVn?= <arve@android.com>,
       "Woodruff, Richard" <r-woodruff2@ti.com>,
       Arjan van de Ven <arjan@infradead.org>,
       Kyle Moffett <kyle@moffetthome.net>, Oliver Neukum <oliver@neukum.org>,
       Benjamin Herrenschmidt <benh@kernel.crashing.org>,
       pm list <linux-pm@lists.linux-foundation.org>,
       LKML <linux-kernel@vger.kernel.org>, Pavel Machek <pavel@ucw.cz>,
       Nigel Cunningham <nigel@nigel.suspend2.net>,
       Matthew Garrett <mjg59@srcf.ucam.org>,
       mark gross <mgross@linux.intel.com>, Uli Luckas <u.luckas@road.de>,
       Igor Stoppa <igor.stoppa@nokia.com>, Len Brown <lenb@kernel.org>
Subject: Re: [RFD] Automatic suspend
Message-ID: <20090219215631.GA23925@bulgaria.corp.google.com>
References: <Pine.LNX.4.44L0.0902190956570.3012-100000@iolanthe.rowland.org> <200902192215.18365.rjw@sisk.pl>
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["Rafael J. Wysocki" <rjw@sisk.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