From: Matthew Garrett <mjg@redhat.com>
To: Felipe Balbi <me@felipebalbi.com>
Cc: James Bottomley <James.Bottomley@suse.de>,
Kevin Hilman <khilman@deeprootsystems.com>,
Alan Stern <stern@rowland.harvard.edu>,
linux-omap@vger.kernel.org, Theodore Ts'o <tytso@mit.edu>,
Geoff Smith <geoffx.smith@intel.com>,
Brian Swetland <swetland@google.com>,
Kernel development list <linux-kernel@vger.kernel.org>,
Oleg Nesterov <oleg@redhat.com>,
Mark Brown <broonie@opensource.wolfsonmicro.com>,
Tejun Heo <tj@kernel.org>,
Linux-pm mailing list <linux-pm@lists.linux-foundation.org>,
Arjan van de Ven <arjan@infradead.org>,
Liam Girdwood <lrg@slimlogic.co.uk>
Subject: Re: [linux-pm] [PATCH 0/8] Suspend block api (version 6)
Date: Mon, 17 May 2010 18:58:20 +0100 [thread overview]
Message-ID: <20100517175820.GA29773@srcf.ucam.org> (raw)
In-Reply-To: <20100517174647.GA11512@gandalf>
On Mon, May 17, 2010 at 08:47:31PM +0300, Felipe Balbi wrote:
> IMO the real fix would be on that particular poll(), changing the
> timeout e.g. based on cpufreq notifications or even relying completely
> on IRQs with poll(pdfs, ARRAY_SIZE(pfds), -1); Of course, this is only a
> crude example trying to show that the real issue lies on the application
> rather than on kernel.
We know that this problem is mostly uninteresting if your userland is
well written. The sad truth is that it's impossible to trust that your
userland is well written, and broadly impossible to communicate to users
that the reason that their battery life is miserable is because of the
applications and not because of the platform. If you don't believe that
that's a worthwhile use case to deal with then suspend blockers buy you
pretty much nothing. But if you do, then nobody's yet demonstrated
another workable way for this to be handled.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2010-05-17 17:58 UTC|newest]
Thread overview: 186+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1272667021-21312-1-git-send-email-arve@android.com>
2010-05-13 3:35 ` [linux-pm] [PATCH 0/8] Suspend block api (version 6) 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 ` [linux-pm] " 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 ` [linux-pm] " 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 ` [linux-pm] " 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 ` [linux-pm] " 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 [this message]
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
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 ` [linux-pm] " 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 ` [linux-pm] " 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
[not found] ` <1272667021-21312-2-git-send-email-arve@android.com>
2010-05-13 19:01 ` [PATCH 1/8] PM: Add suspend block api Paul Walmsley
2010-05-14 20:05 ` Paul Walmsley
[not found] ` <87wrvl5479.fsf@deeprootsystems.com>
[not found] ` <20100503180741.GB2098@rakim.wolfsonmicro.main>
2010-05-14 17:39 ` [PATCH 0/8] Suspend block api (version 6) Paul Walmsley
[not found] ` <201005032318.35383.rjw@sisk.pl>
2010-05-14 20:02 ` Paul Walmsley
[not found] ` <87sk68r1zh.fsf@deeprootsystems.com>
[not found] ` <s2qd6200be21005031709r28420f0ezf3cf286517ee9114@mail.gmail.com>
2010-05-14 20:27 ` Paul Walmsley
2010-05-14 22:18 ` Arve Hjønnevåg
2010-05-15 2:25 ` Alan Stern
2010-05-15 4:02 ` Arve Hjønnevåg
2010-05-15 21:25 ` Alan Stern
2010-05-17 4:54 ` Arve Hjønnevåg
2010-05-18 2:26 ` Paul Walmsley
2010-05-18 3:21 ` Arve Hjønnevåg
2010-05-18 7:03 ` Henrik Rydberg
2010-05-18 19:39 ` Rafael J. Wysocki
2010-05-25 9:41 ` Paul Walmsley
2010-05-25 23:08 ` Arve Hjønnevåg
2010-05-26 7:23 ` Linus WALLEIJ
2010-05-26 16:01 ` Alan Stern
2010-05-27 7:46 ` Linus WALLEIJ
2010-05-27 8:04 ` Florian Mickler
2010-05-27 8:40 ` Arve Hjønnevåg
2010-05-27 15:33 ` Alan Stern
2010-05-28 11:54 ` Linus WALLEIJ
2010-05-20 23:37 ` David Brownell
2010-05-25 16:51 ` Dmitry Torokhov
2010-05-25 18:25 ` Alan Stern
2010-05-25 18:33 ` Dmitry Torokhov
2010-05-25 22:05 ` Arve Hjønnevåg
2010-05-25 22:28 ` Dmitry Torokhov
[not found] ` <20100504004338.GA22678@srcf.ucam.org>
2010-05-14 20:36 ` Paul Walmsley
[not found] ` <20100503215028.GB18910@srcf.ucam.org>
2010-05-14 20:20 ` Paul Walmsley
2010-05-14 20:32 ` Matthew Garrett
2010-05-14 22:32 ` Kevin Hilman
2010-05-14 22:37 ` Arve Hjønnevåg
2010-05-15 19:47 ` Rafael J. Wysocki
2010-05-15 19:55 ` Brian Swetland
2010-05-15 23:51 ` Rafael J. Wysocki
2010-05-16 0:31 ` Brian Swetland
2010-05-14 23:15 ` tytso
2010-05-15 19:52 ` Rafael J. Wysocki
2010-05-16 19:01 ` Mark Brown
2010-05-18 1:39 ` Paul Walmsley
2010-05-18 1:55 ` Matthew Garrett
2010-05-19 16:17 ` Paul Walmsley
2010-05-19 16:25 ` Matthew Garrett
2010-05-21 16:51 ` Paul Walmsley
2010-05-21 17:01 ` Paul Walmsley
2010-05-21 17:09 ` Matthew Garrett
2010-05-17 16:12 ` Kevin Hilman
2010-05-17 19:27 ` Vitaly Wool
2010-05-17 19:34 ` Matthew Garrett
2010-05-17 19:50 ` Daniel Walker
2010-05-17 20:00 ` Matthew Garrett
2010-05-17 20:02 ` Brian Swetland
2010-05-17 20:53 ` Linus WALLEIJ
2010-05-17 21:06 ` Matthew Garrett
2010-05-17 21:16 ` Linus WALLEIJ
2010-05-17 21:24 ` Matthew Garrett
2010-05-17 21:29 ` Daniel Walker
2010-05-17 21:35 ` Matthew Garrett
2010-05-17 21:39 ` Daniel Walker
2010-05-17 21:27 ` Kevin Hilman
2010-05-17 21:34 ` Matthew Garrett
2010-05-17 22:56 ` Kevin Hilman
2010-05-17 21:36 ` Brian Swetland
2010-05-18 2:40 ` tytso
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
2010-05-17 20:15 ` Rafael J. Wysocki
2010-05-30 12:21 ` tytso
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