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Re: [RFD] Automatic suspend

From:  Arjan van de Ven <>
To:  Brian Swetland <>
Subject:  Re: [RFD] Automatic suspend
Date:  Tue, 17 Feb 2009 06:46:30 -0800
Message-ID:  <>
Cc:  Matthew Garrett <>, "Rafael J. Wysocki" <>, "Woodruff, Richard" <>, Alan Stern <>, Kyle Moffett <>, Oliver Neukum <>, Benjamin Herrenschmidt <>, pm list <>, LKML <>, Arve =?UTF-8?B?SGrDuG5uZXbDpWc=?= <>, Pavel Machek <>, Nigel Cunningham <>, mark gross <>, Uli Luckas <>, Igor Stoppa <>, Len Brown <>
Archive-link:  Article

On Tue, 17 Feb 2009 06:20:01 -0800
Brian Swetland <> 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
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