linux-kernel - Re: [RFD] Automatic suspend

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Date:	Wed, 18 Feb 2009 09:53:48 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Arjan van de Ven <arjan@...radead.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Arve Hjønnevåg <arve@...roid.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Pavel Machek <pavel@....cz>,
	Nigel Cunningham <nigel@...el.suspend2.net>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	mark gross <mgross@...ux.intel.com>,
	"Woodruff, Richard" <r-woodruff2@...com>,
	Uli Luckas <u.luckas@...d.de>,
	Igor Stoppa <igor.stoppa@...ia.com>,
	Brian Swetland <swetland@...gle.com>,
	Len Brown <lenb@...nel.org>
Subject: Re: [RFD] Automatic suspend

Am Wednesday 18 February 2009 00:26:53 schrieb Rafael J. Wysocki:
> > Another possibility is to set up independent runtime PM for the
> > transport and the device.  This means allowing the possibility that the
> > transport is suspended while its child (the device) is not.  This is a
> > little simpler (there's only one idle-timeout per device, since the
> > link is treated as an independent device), but it violates the
> > principle of never suspending a parent while there is an active child.
> 
> Well, I think the first approach would be better.

I am afraid it wouldn't be. How do you deal with shared transports?

	Regards
		Oliver

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