From: Pavel Machek <pavel@ucw.cz>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: David Brownell <david-b@pacbell.net>,
linux-kernel@vger.kernel.org, gregkh@suse.de
Subject: Re: [PATCH] Fix /sys/device/.../power/state regression
Date: Sat, 27 Jan 2007 13:17:29 +0000 [thread overview]
Message-ID: <20070127131728.GB3942@ucw.cz> (raw)
In-Reply-To: <20070125050009.GA8672@srcf.ucam.org>
Hi!
> In 2.6.19, support for splitting driver suspend and resume callbacks
> into interrupt and non-interrupt contexts was added. Unfortunately, this
> broke /sys/device/.../power/state support for all devices. In the long
> run, this should be obsoleted by power management support in the
> individual drivers - however, in the case of network drivers (for
> example), currently only three drivers implement any sort of useful
> run-time power management.
Well... solution seems to be 'implement useful pm for more drivers'
not 'discourage people from doing so by re-enabling broken interface'.
> --- a/Documentation/feature-removal-schedule.txt
> +++ b/Documentation/feature-removal-schedule.txt
> @@ -9,7 +9,8 @@ be removed from this file.
> What: /sys/devices/.../power/state
> dev->power.power_state
> dpm_runtime_{suspend,resume)()
> -When: July 2007
> + bus->pm_has_noirq_stage()
> +When: Once alternative functionality has been implemented
.../power/state never worked properly. You have been warned and it is
going to be removed. It oopses kernels... while 'only' providing power
savings. If you are interested in power savings, please help doing
them right.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2007-01-27 17:05 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-19 18:52 Changes to sysfs PM layer break userspace Matthew Garrett
2006-12-19 19:34 ` Arjan van de Ven
2006-12-19 19:44 ` Matthew Garrett
2006-12-19 20:03 ` Arjan van de Ven
2006-12-19 20:08 ` Matthew Garrett
2006-12-19 20:23 ` Arjan van de Ven
2006-12-19 20:32 ` Matthew Garrett
2006-12-19 20:55 ` Arjan van de Ven
2006-12-21 0:08 ` Kyle Moffett
2006-12-19 21:34 ` David Brownell
2006-12-20 0:25 ` Matthew Garrett
2006-12-20 3:59 ` Changes to " David Brownell
2006-12-20 4:26 ` Matthew Garrett
2006-12-20 5:14 ` David Brownell
2006-12-20 5:34 ` Greg KH
2006-12-20 5:52 ` Matthew Garrett
2006-12-20 7:50 ` Arjan van de Ven
2006-12-20 12:53 ` Network drivers that don't suspend on interface down Matthew Garrett
2006-12-20 13:38 ` Arjan van de Ven
2006-12-20 14:31 ` Matthew Garrett
2006-12-20 15:51 ` Arjan van de Ven
2006-12-20 22:49 ` Stephen Hemminger
2006-12-20 23:37 ` Rick Jones
2006-12-19 23:51 ` Stephen Hemminger
2006-12-21 0:11 ` Francois Romieu
2006-12-20 0:26 ` Stephen Hemminger
2006-12-21 11:18 ` Francois Romieu
2006-12-21 1:12 ` Matthew Garrett
2006-12-21 2:05 ` Michael Wu
2006-12-21 2:18 ` Matthew Garrett
2006-12-21 2:38 ` Daniel Drake
2006-12-21 2:45 ` Matthew Garrett
2006-12-21 3:08 ` Daniel Drake
2006-12-21 3:25 ` Matthew Garrett
2006-12-21 3:37 ` Dan Williams
2006-12-21 3:29 ` Dan Williams
2006-12-21 3:14 ` Dan Williams
2006-12-21 13:14 ` jamal
2006-12-21 2:29 ` Daniel Drake
2006-12-21 2:10 ` Jesse Brandeburg
2006-12-21 8:54 ` Arjan van de Ven
2006-12-22 1:03 ` Herbert Xu
2006-12-23 8:54 ` Pavel Machek
2006-12-20 15:27 ` Olivier Galibert
2006-12-20 15:34 ` Arjan van de Ven
2006-12-20 16:40 ` Olivier Galibert
2006-12-20 17:21 ` Arjan van de Ven
2006-12-20 20:40 ` Benny Amorsen
2006-12-20 21:49 ` Arjan van de Ven
2006-12-20 21:15 ` Stefan Rompf
2006-12-20 14:00 ` Jiri Benc
2006-12-20 18:12 ` Dan Williams
2006-12-21 1:15 ` Matthew Garrett
2006-12-21 1:57 ` Michael Wu
2006-12-21 2:20 ` Matthew Garrett
2006-12-21 3:02 ` Dan Williams
2006-12-21 3:06 ` Dan Williams
2006-12-21 3:14 ` Matthew Garrett
2006-12-21 3:32 ` Dan Williams
2006-12-21 13:19 ` Sven-Haegar Koch
2006-12-21 17:16 ` Dan Williams
2006-12-21 18:27 ` Valdis.Kletnieks
2006-12-22 1:25 ` Matt Domsch
2006-12-20 16:04 ` Maciej W. Rozycki
2006-12-22 21:09 ` Changes to PM layer break userspace Pavel Machek
2006-12-24 7:02 ` David Brownell
2006-12-28 13:31 ` Alan
2006-12-28 16:04 ` Arjan van de Ven
2006-12-29 5:27 ` David Brownell
2006-12-20 2:15 ` Changes to sysfs " Andrew Morton
2006-12-20 2:35 ` Randy Dunlap
2006-12-20 3:49 ` Andrew Morton
2006-12-20 3:29 ` David Brownell
2006-12-21 3:51 ` Andrew Morton
2006-12-21 4:56 ` David Brownell
2006-12-21 5:02 ` Andrew Morton
2006-12-21 7:05 ` David Brownell
2006-12-21 8:27 ` Arjan van de Ven
2006-12-22 20:44 ` Pavel Machek
2006-12-23 14:02 ` Stefan Seyfried
2006-12-19 21:22 ` David Brownell
2006-12-19 22:57 ` Matthew Garrett
2006-12-19 23:36 ` Changes to " David Brownell
2006-12-20 0:09 ` Matthew Garrett
2006-12-20 3:19 ` David Brownell
2006-12-20 3:43 ` Matthew Garrett
2006-12-20 4:15 ` David Brownell
2006-12-20 4:56 ` [PATCH 1/2] Fix /sys/device/.../power/state Matthew Garrett
2006-12-20 21:18 ` David Brownell
2006-12-21 1:29 ` Matthew Garrett
2006-12-21 3:04 ` David Brownell
2006-12-21 4:06 ` Matthew Garrett
2006-12-21 4:51 ` David Brownell
2007-01-25 5:00 ` [PATCH] Fix /sys/device/.../power/state regression Matthew Garrett
2007-01-26 19:59 ` Andrew Morton
2007-01-26 20:42 ` Greg KH
2007-01-27 1:26 ` Matthew Garrett
2007-01-27 17:19 ` Pavel Machek
2007-01-26 20:41 ` Greg KH
2007-01-26 21:56 ` David Brownell
2007-01-26 22:19 ` Greg KH
2007-01-26 23:15 ` Matthew Garrett
2007-01-27 0:42 ` David Brownell
2007-01-27 0:56 ` Andrew Morton
2007-01-27 2:40 ` David Brownell
2007-01-27 17:38 ` Pavel Machek
2007-01-27 22:42 ` Matthew Garrett
2007-01-31 10:34 ` Pavel Machek
2007-01-27 1:19 ` Matthew Garrett
2007-01-27 3:02 ` David Brownell
2007-01-29 17:36 ` Stephen Hemminger
2007-01-27 13:17 ` Pavel Machek [this message]
2007-01-30 18:43 ` Eric Piel
2007-01-30 18:47 ` Oliver Neukum
2007-01-30 19:01 ` Eric Piel
2007-01-31 10:55 ` Jiri Kosina
2007-01-31 11:03 ` Oliver Neukum
2006-12-20 4:56 ` [PATCH 2/2] Update feature-removal-schedule.txt Matthew Garrett
2006-12-22 20:47 ` Changes to PM layer break userspace Pavel Machek
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