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Re: [RFD] Automatic suspend

From:  Arjan van de Ven <arjan-AT-infradead.org>
To:  Brian Swetland <swetland-AT-google.com>
Subject:  Re: [RFD] Automatic suspend
Date:  Tue, 17 Feb 2009 06:46:30 -0800
Message-ID:  <20090217064630.688bf639@infradead.org>
Cc:  Matthew Garrett <mjg59-AT-srcf.ucam.org>, "Rafael J. Wysocki" <rjw-AT-sisk.pl>, "Woodruff, Richard" <r-woodruff2-AT-ti.com>, Alan Stern <stern-AT-rowland.harvard.edu>, Kyle Moffett <kyle-AT-moffetthome.net>, Oliver Neukum <oliver-AT-neukum.org>, Benjamin Herrenschmidt <benh-AT-kernel.crashing.org>, pm list <linux-pm-AT-lists.linux-foundation.org>, LKML <linux-kernel-AT-vger.kernel.org>, Arve =?UTF-8?B?SGrDuG5uZXbDpWc=?= <arve-AT-android.com>, Pavel Machek <pavel-AT-ucw.cz>, Nigel Cunningham <nigel-AT-nigel.suspend2.net>, mark gross <mgross-AT-linux.intel.com>, Uli Luckas <u.luckas-AT-road.de>, Igor Stoppa <igor.stoppa-AT-nokia.com>, Len Brown <lenb-AT-kernel.org>
Archive-link:  Article

On Tue, 17 Feb 2009 06:20:01 -0800
Brian Swetland <swetland@google.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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