From: Pavel Machek <pavel@suse.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: Changes to PM layer break userspace
Date: Fri, 22 Dec 2006 20:47:02 +0000 [thread overview]
Message-ID: <20061222204701.GC3960@ucw.cz> (raw)
In-Reply-To: <20061220000955.GA17231@srcf.ucam.org>
Hi!
> > That's a workable approach to resolving the underlying problem in the
> > long term. In the short term, notice the system still works correctly
> > if you don't try writing those files.
>
> Well, except I'm now burning an extra couple of watts of power. I
> consider that pretty broken.
Couple of watts is not that bad, considering usb still eats 4W more
than it should.
> > I'd not be keen on reverting Linus' patch [1] myself, even though few
> > drivers have started to use that mechanism yet; that would be a step
> > backwards, and would perpetuate users of that broken sysfs file.
>
> I'm sorry, which bit of "Don't break userspace API without adequate
> prior warning and with a workable replacement" is difficult to
> understand?
It should not break any userspace... but you do not get the power
savings any more. Sorry. This kind of powersaving is not available on
recent kernels.
Right fix is to extend wifi stack... and have ifconfig wlan0
powerdown, or something like that.
Pavel
--
Thanks for all the (sleeping) penguins.
prev parent reply other threads:[~2006-12-23 9:37 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
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 ` Pavel Machek [this message]
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