From: David Brownell <david-b@pacbell.net>
To: me@felipebalbi.com
Cc: felipe.balbi@nokia.com,
Vladimir Pantelic <pan@nt.tu-darmstadt.de>,
Matthew Garrett <mjg@redhat.com>,
"me@felipebalbi.com" <me@felipebalbi.com>,
"Theodore Ts'o" <tytso@mit.edu>,
Brian Swetland <swetland@google.com>,
Mark Brown <broonie@opensource.wolfsonmicro.com>,
Geoff Smith <geoffx.smith@intel.com>,
Kernel development list <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Oleg Nesterov <oleg@redhat.com>, Tejun Heo <tj@kernel.org>,
Linux-pm mailing list <linux-pm@lists.linux-foundation.org>,
"linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>,
Liam Girdwood <lrg@slimlogic.co.uk>,
Andrew Morton <akpm@linux-foundation.org>,
Arjan van de Ven <arjan@infradead.org>
Subject: Re: [linux-pm] [PATCH 0/8] Suspend block api (version 6)
Date: Thu, 20 May 2010 16:08:49 -0700 (PDT) [thread overview]
Message-ID: <758575.48890.qm@web180307.mail.gq1.yahoo.com> (raw)
In-Reply-To: <20100520185057.GA25089@gandalf>
> -0700, David Brownell wrote:
> > Some apps do abuse kernel mechanisms, and whether the
> bug is in the
> > app or that kernel mechanism can be a judgement
> call. I'd expect to
>
> hey come on, there's no judgement call for an app polling
> every second
> to check battery status or some other status that doesn't
> change that frequently.
Or something as broken as a non-terminating CPU loop ...
Of course not. But if there's a kernel mechanism exposed to
userspace which really sucks down power ... either it's done
correctly and the problem is userspace abusing it, or it's done
wrong so that it's not possible to be used correctly. There are
some things that just cost power, and that cost can't be escaped.
next prev parent reply other threads:[~2010-05-20 23:08 UTC|newest]
Thread overview: 323+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-30 22:36 Arve Hjønnevåg
2010-04-30 22:36 ` [PATCH 1/8] PM: Add suspend block api Arve Hjønnevåg
2010-04-30 22:36 ` [PATCH 2/8] PM: suspend_block: Add driver to access suspend blockers from user-space Arve Hjønnevåg
2010-04-30 22:36 ` [PATCH 3/8] PM: suspend_block: Abort task freezing if a suspend_blocker is active Arve Hjønnevåg
2010-04-30 22:36 ` [PATCH 4/8] PM: suspend_block: Add debugfs file Arve Hjønnevåg
2010-04-30 22:36 ` [PATCH 5/8] PM: suspend_block: Add suspend_blocker stats Arve Hjønnevåg
2010-04-30 22:36 ` [PATCH 6/8] PM: Add suspend blocking work Arve Hjønnevåg
2010-04-30 22:37 ` [PATCH 7/8] Input: Block suspend while event queue is not empty Arve Hjønnevåg
2010-04-30 22:37 ` [PATCH 8/8] power_supply: Block suspend while power supply change notifications are pending Arve Hjønnevåg
2010-05-01 6:14 ` [PATCH 6/8] PM: Add suspend blocking work Tejun Heo
2010-05-02 7:05 ` Pavel Machek
2010-05-04 11:16 ` [PATCH 4/8] PM: suspend_block: Add debugfs file Andi Kleen
2010-05-04 21:06 ` Arve Hjønnevåg
2010-05-02 6:57 ` [PATCH 3/8] PM: suspend_block: Abort task freezing if a suspend_blocker is active Pavel Machek
2010-05-02 7:04 ` [PATCH 2/8] PM: suspend_block: Add driver to access suspend blockers from user-space Pavel Machek
2010-05-02 21:23 ` Rafael J. Wysocki
2010-05-02 21:56 ` Alan Stern
2010-05-03 15:03 ` Rafael J. Wysocki
2010-05-03 21:26 ` Arve Hjønnevåg
2010-05-03 21:49 ` Rafael J. Wysocki
2010-05-03 22:01 ` Arve Hjønnevåg
2010-05-04 20:02 ` Rafael J. Wysocki
2010-05-04 4:16 ` Pavel Machek
2010-05-02 6:56 ` [PATCH 1/8] PM: Add suspend block api Pavel Machek
2010-05-02 20:10 ` Rafael J. Wysocki
2010-05-02 20:52 ` Pavel Machek
2010-05-02 21:29 ` Rafael J. Wysocki
2010-05-03 19:01 ` Pavel Machek
2010-05-03 21:38 ` Rafael J. Wysocki
2010-05-03 22:11 ` Alan Stern
2010-05-03 22:24 ` Arve Hjønnevåg
2010-05-02 7:01 ` Pavel Machek
2010-05-04 5:12 ` [linux-pm] " mark gross
2010-05-04 13:59 ` Alan Stern
2010-05-04 16:03 ` mark gross
2010-05-04 17:16 ` Alan Stern
2010-05-05 1:50 ` mark gross
2010-05-05 13:31 ` Matthew Garrett
2010-05-05 20:09 ` mark gross
2010-05-05 20:21 ` Matthew Garrett
2010-05-05 15:44 ` Alan Stern
2010-05-05 20:28 ` mark gross
2010-05-05 21:12 ` Alan Stern
2010-05-05 21:37 ` Brian Swetland
2010-05-05 23:47 ` Tony Lindgren
2010-05-05 23:56 ` Brian Swetland
2010-05-06 0:05 ` Tony Lindgren
2010-05-06 4:16 ` Arve Hjønnevåg
2010-05-06 17:04 ` Tony Lindgren
2010-05-07 0:10 ` Arve Hjønnevåg
2010-05-07 15:54 ` Tony Lindgren
2010-05-28 6:43 ` Pavel Machek
2010-05-28 7:01 ` Arve Hjønnevåg
2010-05-06 13:40 ` Matthew Garrett
2010-05-06 17:01 ` Tony Lindgren
2010-05-06 17:09 ` Matthew Garrett
2010-05-06 17:14 ` Tony Lindgren
2010-05-06 17:22 ` Matthew Garrett
2010-05-06 17:38 ` Tony Lindgren
2010-05-06 17:43 ` Matthew Garrett
2010-05-06 18:33 ` Tony Lindgren
2010-05-06 18:44 ` Matthew Garrett
2010-05-07 2:05 ` Tony Lindgren
2010-05-07 17:12 ` Matthew Garrett
2010-05-07 17:35 ` Tony Lindgren
2010-05-07 17:50 ` Matthew Garrett
2010-05-07 18:01 ` Tony Lindgren
2010-05-07 18:28 ` Matthew Garrett
2010-05-07 18:43 ` Tony Lindgren
2010-05-07 18:46 ` Matthew Garrett
2010-05-07 19:06 ` Daniel Walker
2010-05-07 19:28 ` Tony Lindgren
2010-05-07 19:33 ` Matthew Garrett
2010-05-07 19:55 ` Tony Lindgren
2010-05-07 20:28 ` Matthew Garrett
2010-05-07 20:53 ` Tony Lindgren
2010-05-07 21:03 ` Matthew Garrett
2010-05-07 21:25 ` Tony Lindgren
2010-05-07 21:32 ` Arve Hjønnevåg
2010-05-07 21:39 ` Matthew Garrett
2010-05-07 21:42 ` Tony Lindgren
2010-05-07 21:48 ` Matthew Garrett
2010-05-07 22:00 ` Tony Lindgren
2010-05-07 22:28 ` Matthew Garrett
2010-05-07 21:30 ` Daniel Walker
2010-05-07 21:35 ` Arve Hjønnevåg
2010-05-07 21:43 ` Daniel Walker
2010-05-07 21:38 ` Matthew Garrett
2010-05-06 18:47 ` Alan Stern
2010-05-07 2:20 ` Tony Lindgren
2010-05-28 13:29 ` Pavel Machek
2010-05-28 13:42 ` Brian Swetland
2010-05-06 17:35 ` Daniel Walker
2010-05-06 18:36 ` Tony Lindgren
2010-05-06 19:11 ` Daniel Walker
2010-05-07 2:00 ` Tony Lindgren
2010-05-07 17:20 ` Daniel Walker
2010-05-07 17:36 ` Matthew Garrett
2010-05-07 17:40 ` Daniel Walker
2010-05-07 17:51 ` Matthew Garrett
2010-05-07 18:00 ` Daniel Walker
2010-05-07 18:17 ` Tony Lindgren
2010-05-07 17:50 ` Tony Lindgren
2010-05-07 3:45 ` mgross
2010-05-07 3:45 ` mgross
2010-05-07 4:10 ` Arve Hjønnevåg
2010-05-04 20:40 ` Arve Hjønnevåg
2010-05-03 16:40 ` [PATCH 0/8] Suspend block api (version 6) Kevin Hilman
2010-05-03 17:12 ` Alan Stern
2010-05-03 18:17 ` Kevin Hilman
2010-05-03 18:07 ` Mark Brown
2010-05-03 21:18 ` Rafael J. Wysocki
2010-05-03 23:37 ` Kevin Hilman
2010-05-04 0:09 ` Arve Hjønnevåg
2010-05-04 0:43 ` Brian Swetland
2010-05-04 13:59 ` Mark Brown
2010-05-04 18:06 ` Kevin Hilman
2010-05-04 19:06 ` Mark Brown
2010-05-04 20:37 ` Rafael J. Wysocki
2010-05-04 23:14 ` Kevin Hilman
2010-05-04 23:42 ` Rafael J. Wysocki
2010-05-04 20:23 ` Rafael J. Wysocki
2010-05-04 20:44 ` Rafael J. Wysocki
2010-05-04 23:56 ` Mark Brown
2010-05-05 0:22 ` Rafael J. Wysocki
2010-05-05 1:11 ` Brian Swetland
2010-05-05 11:06 ` Mark Brown
2010-05-05 12:00 ` Brian Swetland
2010-05-05 13:56 ` Mark Brown
2010-05-05 17:33 ` Matthew Garrett
2010-05-05 18:36 ` Alan Stern
2010-05-05 18:52 ` Matthew Garrett
2010-05-05 19:13 ` Alan Stern
2010-05-05 19:22 ` Matthew Garrett
2010-05-05 19:52 ` Mark Brown
2010-05-05 19:55 ` tytso
2010-05-05 20:26 ` Mark Brown
2010-05-05 20:44 ` Rafael J. Wysocki
2010-05-05 21:57 ` Mark Brown
2010-05-05 22:03 ` Brian Swetland
2010-05-05 22:05 ` Rafael J. Wysocki
2010-05-05 23:09 ` Mark Brown
2010-05-05 23:33 ` Rafael J. Wysocki
2010-05-06 0:21 ` Mark Brown
2010-05-06 0:51 ` Rafael J. Wysocki
2010-05-05 20:02 ` Matthew Garrett
2010-05-05 20:09 ` Mark Brown
2010-05-05 19:39 ` Mark Brown
2010-05-05 20:56 ` Brian Swetland
2010-05-05 23:40 ` Mark Brown
2010-05-06 4:25 ` Arve Hjønnevåg
2010-05-07 10:04 ` Mark Brown
2010-05-07 10:57 ` Arve Hjønnevåg
2010-05-07 11:21 ` Mark Brown
2010-05-07 11:29 ` Theodore Tso
2010-05-07 12:25 ` Mark Brown
2010-05-07 12:37 ` Brian Swetland
2010-05-07 13:30 ` Mark Brown
2010-05-11 18:47 ` Mark Brown
2010-05-07 11:41 ` Arve Hjønnevåg
2010-05-07 14:00 ` Mark Brown
2010-05-05 19:07 ` Mark Brown
2010-05-05 19:20 ` Alan Stern
2010-05-05 19:28 ` Matthew Garrett
2010-05-05 20:04 ` Alan Stern
2010-05-05 20:15 ` Mark Brown
2010-05-05 20:28 ` Rafael J. Wysocki
2010-05-05 23:03 ` Kevin Hilman
2010-05-05 23:16 ` Rafael J. Wysocki
2010-05-05 23:42 ` Brian Swetland
2010-05-06 14:08 ` Alan Stern
2010-05-06 19:26 ` Rafael J. Wysocki
2010-05-05 18:39 ` Mark Brown
2010-05-05 15:35 ` Alan Stern
2010-05-05 16:27 ` Mark Brown
2010-05-04 18:04 ` Kevin Hilman
2010-05-04 0:43 ` Matthew Garrett
2010-05-04 13:51 ` Alan Stern
2010-05-04 14:53 ` Mark Brown
2010-05-04 15:13 ` Kevin Hilman
2010-05-04 15:27 ` Matthew Garrett
2010-05-06 1:40 ` Magnus Damm
2010-05-04 15:13 ` Kevin Hilman
2010-05-04 15:28 ` Matthew Garrett
2010-05-03 21:50 ` Matthew Garrett
[not found] ` <alpine.DEB.2.00.1005141408260.3348@utopia.booyaka.com>
[not found] ` <20100514203202.GA12409@srcf.ucam.org>
[not found] ` <87aas2azc5.fsf@deeprootsystems.com>
[not found] ` <20100514231510.GG16989@thunk.org>
[not found] ` <87r5laa4oc.fsf@deeprootsystems.com>
[not found] ` <AANLkTilL90pYVlquvMDAEPHj_AraEi9Qzk-0tTjw9Bkx@mail.gmail.com>
2010-05-17 20:07 ` [linux-pm] " Mike Chan
2010-05-17 20:17 ` Vitaly Wool
2010-05-17 21:04 ` Mike Chan
2010-05-17 22:55 ` Kevin Hilman
2010-05-17 23:04 ` Brian Swetland
2010-05-24 18:57 ` Pavel Machek
2010-05-24 19:08 ` Matthew Garrett
2010-05-25 1:16 ` Arve Hjønnevåg
2010-05-26 17:32 ` Pavel Machek
2010-05-05 20:35 ` mark gross
2010-05-10 18:06 ` Kevin Hilman
2010-05-10 20:25 ` Rafael J. Wysocki
2010-05-11 16:12 ` Tony Lindgren
2010-05-11 16:14 ` Matthew Garrett
2010-05-11 16:36 ` Tony Lindgren
2010-05-11 16:45 ` Matthew Garrett
2010-05-11 16:58 ` Tony Lindgren
2010-05-11 17:03 ` Matthew Garrett
2010-05-11 17:24 ` Tony Lindgren
2010-05-11 17:30 ` Matthew Garrett
2010-05-11 17:48 ` Tony Lindgren
2010-05-11 18:01 ` Matthew Garrett
2010-05-11 18:19 ` Rafael J. Wysocki
2010-05-12 1:11 ` Arve Hjønnevåg
2010-05-12 11:22 ` Mark Brown
2010-05-13 3:35 ` [linux-pm] " Paul Walmsley
2010-05-13 12:17 ` Matthew Garrett
2010-05-13 17:33 ` Daniel Walker
2010-05-13 18:17 ` Brian Swetland
2010-05-13 18:25 ` Daniel Walker
2010-05-13 18:36 ` Matthew Garrett
2010-05-13 18:59 ` Daniel Walker
2010-05-13 19:11 ` Matthew Garrett
2010-05-13 19:36 ` Daniel Walker
2010-05-13 19:48 ` Matthew Garrett
2010-05-13 21:11 ` Rafael J. Wysocki
2010-05-13 21:16 ` Daniel Walker
2010-05-13 21:27 ` Rafael J. Wysocki
2010-05-13 21:33 ` Daniel Walker
2010-05-13 21:36 ` Tony Lindgren
2010-05-13 21:54 ` Rafael J. Wysocki
2010-05-13 21:46 ` Greg KH
2010-05-13 22:27 ` Mark Brown
2010-05-13 22:45 ` Greg KH
2010-05-14 0:03 ` Mark Brown
2010-05-13 22:46 ` Rafael J. Wysocki
2010-05-13 23:36 ` Mark Brown
2010-05-13 23:48 ` Brian Swetland
2010-05-14 0:29 ` Mark Brown
2010-05-13 22:33 ` Woodruff, Richard
2010-05-13 22:46 ` Greg KH
2010-05-13 23:06 ` Arve Hjønnevåg
2010-05-13 23:28 ` Brian Swetland
2010-05-14 16:47 ` Daniel Walker
2010-05-13 14:16 ` Alan Stern
2010-05-13 19:17 ` Tony Lindgren
2010-05-13 19:25 ` Matthew Garrett
2010-05-13 19:42 ` Tony Lindgren
2010-05-13 19:53 ` Matthew Garrett
2010-05-13 20:00 ` Tony Lindgren
2010-05-13 20:08 ` Matthew Garrett
2010-05-13 20:23 ` Tony Lindgren
2010-05-13 20:34 ` Matthew Garrett
2010-05-13 21:10 ` Tony Lindgren
2010-05-13 21:21 ` Matthew Garrett
2010-05-13 21:34 ` Tony Lindgren
2010-05-15 19:54 ` Matthew Garrett
2010-05-13 21:21 ` Rafael J. Wysocki
2010-05-13 21:25 ` Tony Lindgren
2010-05-13 21:56 ` Rafael J. Wysocki
2010-05-14 20:41 ` Kevin Hilman
2010-05-14 21:25 ` Rafael J. Wysocki
2010-05-14 21:40 ` Kevin Hilman
2010-05-14 21:50 ` Rafael J. Wysocki
2010-05-14 22:45 ` Kevin Hilman
2010-05-14 22:59 ` Brian Swetland
2010-05-15 2:58 ` Alan Stern
2010-05-15 3:40 ` Brian Swetland
2010-05-15 21:19 ` Alan Stern
2010-05-17 15:40 ` Kevin Hilman
2010-05-17 17:04 ` James Bottomley
2010-05-17 17:47 ` Felipe Balbi
2010-05-17 17:58 ` Matthew Garrett
2010-05-17 18:16 ` Felipe Balbi
2010-05-17 17:59 ` James Bottomley
2010-05-17 18:12 ` Felipe Balbi
2010-05-17 18:26 ` Brian Swetland
2010-05-17 18:39 ` Felipe Balbi
2010-05-17 18:45 ` Brian Swetland
2010-05-17 20:22 ` Rafael J. Wysocki
2010-05-17 18:45 ` Mark Brown
2010-05-17 18:47 ` Mike Chan
2010-05-17 19:24 ` James Bottomley
2010-05-17 19:38 ` Felipe Balbi
2010-05-17 19:39 ` Felipe Balbi
2010-05-17 19:49 ` James Bottomley
2010-05-18 6:40 ` Felipe Balbi
2010-05-18 13:59 ` James Bottomley
2010-05-19 6:59 ` Felipe Balbi
2010-05-19 20:42 ` Rafael J. Wysocki
2010-05-20 4:49 ` Felipe Balbi
2010-05-20 11:27 ` Vladimir Pantelic
2010-05-20 11:29 ` Felipe Balbi
2010-05-20 17:40 ` David Brownell
2010-05-20 18:50 ` Felipe Balbi
2010-05-20 23:08 ` David Brownell [this message]
2010-05-20 5:15 ` Florian Mickler
2010-05-20 8:57 ` Felipe Balbi
2010-05-20 8:57 ` Felipe Balbi
2010-05-20 10:05 ` Florian Mickler
2010-05-20 10:15 ` Felipe Balbi
2010-05-17 18:54 ` Kevin Hilman
2010-05-17 17:57 ` Daniel Walker
2010-05-15 20:14 ` Rafael J. Wysocki
2010-05-16 19:44 ` Mark Brown
2010-05-13 22:24 ` tytso
2010-05-13 20:36 ` Daniel Walker
2010-05-14 16:06 ` Kevin Hilman
2010-05-24 21:25 ` Pavel Machek
2010-05-13 21:41 ` Alan Stern
2010-05-13 21:54 ` Tony Lindgren
2010-05-13 22:07 ` Rafael J. Wysocki
2010-05-13 22:26 ` Arve Hjønnevåg
2010-05-13 21:14 ` Rafael J. Wysocki
2010-05-13 21:31 ` Tony Lindgren
2010-05-13 21:57 ` Rafael J. Wysocki
2010-05-13 21:37 ` Alan Stern
2010-05-13 21:47 ` Tony Lindgren
2010-05-13 22:01 ` Alan Stern
2010-05-13 22:08 ` Tony Lindgren
2010-05-13 22:28 ` Rafael J. Wysocki
2010-05-15 2:35 ` Alan Stern
2010-05-15 4:04 ` Arve Hjønnevåg
2010-05-13 22:04 ` Rafael J. Wysocki
2010-05-14 3:25 ` Magnus Damm
2010-05-14 16:18 ` Kevin Hilman
2010-05-15 2:47 ` Alan Stern
2010-05-24 21:24 ` Pavel Machek
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