From: David Brownell <david-b@pacbell.net>
To: Pavel Machek <pavel@suse.cz>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>,
Arjan van de Ven <arjan@infradead.org>,
linux-kernel@vger.kernel.org, gregkh@suse.de
Subject: Re: Changes to PM layer break userspace
Date: Sat, 23 Dec 2006 23:02:05 -0800 [thread overview]
Message-ID: <200612232302.06151.david-b@pacbell.net> (raw)
In-Reply-To: <20061222210937.GD3960@ucw.cz>
On Friday 22 December 2006 1:09 pm, Pavel Machek wrote:
> Actually, if we noticed power/state during PM framework review, it
> would have been killed. It is just way too ugly.
>
> > > > In contrast, the /sys/devices/.../power/state API has never had many
> > > > users beyond developers trying to test their drivers ...
> > >
> > > It's used on every Ubuntu and Suse system,
> >
> > Odd how the relevant Suse developers didn't mention any issues with
> > those files going away, any of the times problems with them were
> > discussed on the PM list. Also, I have a Suse system that doesn't
> > use those files for anything ... maybe only newer release use it.
>
> Not on *every* suse system. power/state is known to oops kernels, so
> it is only enabled when user explicitely asks for 'dangerous aggresive
> experimental power saving' or something like that.
So exactly what tool on Ubuntu uses this? Without any "dangerous!
aggressive! experimental!" read-lights-siren-alarms-ringing alert level?
Seems to me anyone really desperate to put PCI devices into a low
power mode, without driver support at the "ifdown" level, would be
able just "rmmod driver; setpci". Without risking software bugs.
next prev parent reply other threads:[~2006-12-24 7:02 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 [this message]
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
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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