From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Vitaly Wool <vitalywool@gmail.com>
Cc: "Brian Swetland" <swetland@google.com>,
"Arve Hjønnevåg" <arve@android.com>,
"Arjan van de Ven" <arjan@infradead.org>,
tytso@mit.edu, "Florian Mickler" <florian@mickler.org>,
"Peter Zijlstra" <peterz@infradead.org>,
"H. Peter Anvin" <hpa@zytor.com>,
LKML <linux-kernel@vger.kernel.org>, "Neil Brown" <neilb@suse.de>,
"James Bottomley" <James.Bottomley@suse.de>,
"Alan Cox" <alan@lxorguk.ukuu.org.uk>,
"Linux PM" <linux-pm@lists.linux-foundation.org>,
"Ingo Molnar" <mingo@elte.hu>,
"Linux OMAP Mailing List" <linux-omap@vger.kernel.org>,
"Linus Torvalds" <torvalds@linux-foundation.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Felipe Balbi" <felipe.balbi@nokia.com>
Subject: Re: [linux-pm] suspend blockers & Android integration
Date: Sun, 6 Jun 2010 16:29:46 +0100 [thread overview]
Message-ID: <20100606152946.GA11351@srcf.ucam.org> (raw)
In-Reply-To: <AANLkTimXTgZS_fZQa8hjIptJrCn756gF_xakT1IQiLWa@mail.gmail.com>
On Sun, Jun 06, 2010 at 05:26:09PM +0200, Vitaly Wool wrote:
> 2010/6/6 Matthew Garrett <mjg59@srcf.ucam.org>:
> > Holding a suspend blocker is entirely orthogonal to runtime pm. The
> > "whole kernel" will not be "active" - it can continue to hit the same
> > low power state in the idle loop, and any runtime pm implementation in
> > the drivers will continue to be active.
>
> Yeah, that might also be the case, But then again, what's the use of
> suspend blockers in this situation?
The difference between idle-based suspend and opportunistic suspend is
that the former will continue to wake up for timers and will never be
entered if something is using CPU, whereas the latter will be entered
whenever no suspend blocks are held. The problem with opportunistic
suspend is that you might make the decision to suspend simultaneusly
with a wakeup event being received. Suspend blocks facilitate
synchronisation between the kernel and userspace to ensure that all such
events have been consumed and handld appropriately.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2010-06-06 15:29 UTC|newest]
Thread overview: 195+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-03 19:30 suspend blockers & Android integration Ingo Molnar
2010-06-03 19:50 ` Brian Swetland
2010-06-04 7:57 ` Ingo Molnar
2010-06-04 8:29 ` Brian Swetland
2010-06-04 8:55 ` Ingo Molnar
2010-06-04 9:03 ` Pekka Enberg
2010-06-04 9:08 ` Brian Swetland
2010-06-04 9:59 ` Ingo Molnar
2010-06-04 10:09 ` Brian Swetland
2010-06-04 14:24 ` James Bottomley
2010-06-04 15:07 ` Florian Mickler
2010-06-06 8:04 ` david
2010-06-10 13:58 ` Pavel Machek
2010-06-11 4:21 ` [linux-pm] " David Brownell
2010-06-11 14:28 ` James Bottomley
2010-06-11 14:46 ` Alan Stern
2010-06-11 15:01 ` Mark Brown
2010-06-11 15:02 ` James Bottomley
2010-06-11 20:48 ` Alan Stern
2010-06-11 21:04 ` James Bottomley
2010-06-12 17:10 ` Mark Brown
2010-06-12 2:43 ` David Brownell
2010-06-11 14:42 ` Alan Stern
[not found] ` <20100603231153.GA11302@elte.hu>
2010-06-03 23:23 ` Ingo Molnar
2010-06-03 23:37 ` Linus Torvalds
2010-06-03 23:46 ` Ingo Molnar
2010-06-04 2:16 ` Linus Torvalds
2010-06-04 2:26 ` Linus Torvalds
2010-06-04 3:45 ` Arjan van de Ven
2010-06-04 4:46 ` Linus Torvalds
2010-06-04 10:42 ` Andi Kleen
2010-06-04 8:15 ` Ingo Molnar
2010-06-06 8:16 ` david
2010-06-06 8:23 ` david
2010-06-04 3:45 ` Arve Hjønnevåg
2010-06-04 6:22 ` Ingo Molnar
2010-06-04 8:11 ` Ingo Molnar
2010-06-05 20:37 ` Florian Mickler
2010-06-04 0:39 ` Ingo Molnar
2010-06-04 14:50 ` Alan Stern
2010-06-04 4:38 ` Neil Brown
2010-06-04 4:54 ` Arve Hjønnevåg
2010-06-04 7:13 ` Ingo Molnar
2010-06-04 7:37 ` Arve Hjønnevåg
2010-06-04 8:34 ` Ingo Molnar
2010-06-04 8:56 ` Arve Hjønnevåg
2010-06-04 12:06 ` Peter Zijlstra
2010-06-05 0:10 ` Arve Hjønnevåg
2010-06-05 9:54 ` Peter Zijlstra
2010-06-05 16:28 ` Arjan van de Ven
2010-06-05 21:26 ` Arve Hjønnevåg
2010-06-05 22:23 ` Arjan van de Ven
2010-06-05 22:26 ` Brian Swetland
2010-06-05 22:48 ` Arjan van de Ven
2010-06-05 23:45 ` Thomas Gleixner
2010-06-06 0:34 ` Arve Hjønnevåg
2010-06-05 22:52 ` Rafael J. Wysocki
2010-06-05 22:39 ` Arve Hjønnevåg
2010-06-05 23:34 ` Arjan van de Ven
2010-06-06 0:02 ` Arve Hjønnevåg
2010-06-06 11:18 ` Felipe Contreras
2010-06-06 11:26 ` david
2010-06-06 7:52 ` [linux-pm] " Vitaly Wool
2010-06-06 8:20 ` Brian Swetland
2010-06-06 8:32 ` Vitaly Wool
2010-06-06 9:21 ` Brian Swetland
2010-06-06 9:56 ` david
2010-06-06 11:11 ` Felipe Contreras
2010-06-06 10:00 ` Vitaly Wool
2010-06-06 10:12 ` david
2010-06-06 10:19 ` [linux-pm] " Vitaly Wool
2010-06-06 10:49 ` Florian Mickler
2010-06-06 10:57 ` Vitaly Wool
2010-06-06 11:14 ` [linux-pm] " david
2010-06-07 12:16 ` Florian Mickler
2010-06-09 1:14 ` david
2010-06-09 3:46 ` Linus Torvalds
2010-06-09 7:43 ` [linux-pm] " Felipe Contreras
2010-06-09 9:40 ` Rafael J. Wysocki
2010-06-09 22:04 ` Neil Brown
2010-06-10 8:59 ` Rafael J. Wysocki
2010-06-10 12:00 ` Neil Brown
2010-06-10 16:06 ` Rafael J. Wysocki
2010-06-10 13:57 ` Mark Brown
2010-06-10 15:46 ` Rafael J. Wysocki
2010-06-10 19:01 ` Mark Brown
2010-06-10 14:47 ` Alan Stern
2010-06-10 15:44 ` Rafael J. Wysocki
2010-06-06 10:46 ` Florian Mickler
2010-06-06 11:05 ` Alan Cox
2010-06-06 13:34 ` Matthew Garrett
2010-06-06 14:31 ` James Bottomley
2010-06-06 15:46 ` [linux-pm] " Thomas Gleixner
2010-06-06 17:08 ` James Bottomley
2010-06-06 18:04 ` Thomas Gleixner
2010-06-06 18:44 ` Brian Swetland
2010-06-06 19:26 ` Thomas Gleixner
2010-06-06 19:05 ` [linux-pm] " Christoph Hellwig
2010-06-06 19:15 ` Brian Swetland
2010-06-06 19:24 ` [linux-pm] " Christoph Hellwig
2010-06-06 19:58 ` Brian Swetland
2010-06-06 22:26 ` Thomas Gleixner
2010-06-07 8:00 ` Christoph Hellwig
2010-06-07 8:03 ` Christoph Hellwig
2010-06-07 8:16 ` Brian Swetland
2010-06-07 13:20 ` Peter Zijlstra
2010-06-07 18:40 ` David Brownell
2010-06-07 23:17 ` Linus Walleij
2010-06-07 23:37 ` Brian Swetland
2010-06-08 2:15 ` Valdis.Kletnieks
2010-06-09 12:33 ` [linux-pm] " Mark Brown
2010-07-09 19:11 ` HTC Dream drivers was " Pavel Machek
2010-06-06 13:31 ` Matthew Garrett
2010-06-06 15:26 ` Vitaly Wool
2010-06-06 15:29 ` Matthew Garrett [this message]
2010-06-06 15:47 ` Vitaly Wool
2010-06-06 16:43 ` Matthew Garrett
2010-06-06 17:21 ` Vitaly Wool
2010-06-06 17:31 ` Matthew Garrett
2010-06-06 19:01 ` Rafael J. Wysocki
2010-06-07 10:25 ` Felipe Contreras
2010-06-07 13:01 ` Florian Mickler
2010-06-07 0:01 ` Alan Stern
2010-06-07 1:07 ` [linux-pm] suspend blockers & Android integrationy Thomas Gleixner
2010-06-07 14:42 ` Alan Stern
2010-06-07 15:49 ` Thomas Gleixner
2010-06-07 15:56 ` [linux-pm] suspend blockers & Android integration Florian Mickler
2010-06-08 0:57 ` Arve Hjønnevåg
2010-06-08 1:13 ` Alan Stern
2010-06-04 9:43 ` Peter Zijlstra
2010-06-04 9:54 ` Peter Zijlstra
2010-06-04 10:03 ` Ingo Molnar
2010-06-04 10:08 ` Peter Zijlstra
2010-06-04 10:11 ` Brian Swetland
2010-06-04 10:11 ` Thomas Gleixner
2010-06-04 10:13 ` Peter Zijlstra
2010-06-04 23:38 ` Rafael J. Wysocki
2010-06-05 0:05 ` Thomas Gleixner
2010-06-05 0:39 ` Arve Hjønnevåg
2010-06-05 1:18 ` Matt Helsley
2010-06-05 5:35 ` Arve Hjønnevåg
2010-06-05 18:25 ` Rafael J. Wysocki
2010-06-05 22:10 ` Arve Hjønnevåg
2010-06-05 23:03 ` Rafael J. Wysocki
2010-06-06 1:03 ` Arve Hjønnevåg
2010-06-06 2:49 ` Alan Stern
2010-06-06 11:09 ` [linux-pm] " Alan Stern
2010-06-08 0:23 ` Arve Hjønnevåg
2010-06-08 1:09 ` Alan Stern
2010-06-08 1:31 ` Arve Hjønnevåg
2010-06-08 2:32 ` Alan Stern
2010-06-08 3:05 ` Arve Hjønnevåg
2010-06-08 10:19 ` Florian Mickler
2010-06-08 14:50 ` Alan Stern
2010-06-09 1:48 ` Arve Hjønnevåg
2010-06-09 15:29 ` Alan Stern
2010-06-09 23:42 ` Arve Hjønnevåg
2010-06-10 4:21 ` david
2010-06-10 4:51 ` Arve Hjønnevåg
2010-06-10 5:10 ` Neil Brown
2010-06-10 14:39 ` Alan Stern
2010-06-10 14:28 ` Alan Stern
2010-06-10 23:02 ` Arve Hjønnevåg
2010-06-11 1:44 ` Alan Stern
2010-06-11 3:16 ` Arve Hjønnevåg
2010-06-11 14:33 ` Alan Stern
2010-06-11 22:18 ` Arve Hjønnevåg
2010-06-12 15:22 ` [linux-pm] " Alan Stern
2010-06-07 23:16 ` Arve Hjønnevåg
2010-06-06 13:29 ` Rafael J. Wysocki
2010-06-05 1:33 ` Thomas Gleixner
2010-06-05 5:23 ` Arve Hjønnevåg
2010-06-05 16:47 ` Thomas Gleixner
2010-06-05 21:47 ` Arve Hjønnevåg
2010-06-05 22:11 ` Thomas Gleixner
2010-06-05 23:21 ` Arve Hjønnevåg
2010-06-05 23:39 ` Rafael J. Wysocki
2010-06-06 0:04 ` Thomas Gleixner
2010-06-06 1:16 ` Arve Hjønnevåg
2010-06-06 10:36 ` Thomas Gleixner
2010-06-06 14:43 ` Matt Helsley
2010-06-08 0:45 ` Arve Hjønnevåg
2010-06-07 23:34 ` Arve Hjønnevåg
2010-06-06 10:56 ` Thomas Gleixner
2010-06-08 0:05 ` Arve Hjønnevåg
2010-06-06 0:19 ` Thomas Gleixner
2010-06-06 1:24 ` Arve Hjønnevåg
2010-06-06 0:32 ` Thomas Gleixner
2010-06-06 1:45 ` Arve Hjønnevåg
2010-06-06 10:01 ` Thomas Gleixner
2010-06-05 22:44 ` Rafael J. Wysocki
2010-06-05 23:56 ` Arve Hjønnevåg
2010-06-06 13:55 ` Rafael J. Wysocki
2010-06-08 0:39 ` Arve Hjønnevåg
2010-06-08 9:11 ` Rafael J. Wysocki
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