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Date: Mon, 16 Feb 2009 13:53:39 -0800
From: Arjan van de Ven <arjan@infradead.org>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: pm list <linux-pm@lists.linux-foundation.org>,
       LKML <linux-kernel@vger.kernel.org>,
       Arve =?UTF-8?B?SGrDuG5uZXbDpWc=?= <arve@android.com>,
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       Benjamin Herrenschmidt <benh@kernel.crashing.org>,
       Pavel Machek <pavel@ucw.cz>,
       Nigel Cunningham <nigel@nigel.suspend2.net>,
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       mark gross <mgross@linux.intel.com>,
       "Woodruff, Richard" <r-woodruff2@ti.com>, Uli Luckas <u.luckas@road.de>,
       Igor Stoppa <igor.stoppa@nokia.com>,
       Brian Swetland <swetland@google.com>, Len Brown <lenb@kernel.org>
Subject: Re: [RFD] Automatic suspend
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On Mon, 16 Feb 2009 22:48:32 +0100
"Rafael J. Wysocki" <rjw@sisk.pl> wrote:

> > Userland should never ever control the state of a device like this
> > directly. It should do so by a) closing the device and b) setting
> > latency / functional requirements.
> 
> The user, however, may want to forcibly put a device into a low power
> state without stopping all of the applications that depend on it (eg.
> have it open). Do you think that we shouldn't allow users to do such
> things?

I would think that that is a bad mistake to do. It basically breaks the 
contract that the kernel has with userspace.... 

-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org