From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: LKML <linux-kernel@vger.kernel.org>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
pm list <linux-pm@lists.linux-foundation.org>
Subject: Re: Run-time PM idea (was: Re: [RFC][PATCH 0/2] PM: Rearrange core suspend code)
Date: Mon, 8 Jun 2009 14:11:59 +0100 [thread overview]
Message-ID: <20090608131159.GA15100__27207.9079565176$1244466886$gmane$org@srcf.ucam.org> (raw)
In-Reply-To: <20090608130509.GA3272@elte.hu>
On Mon, Jun 08, 2009 at 03:05:09PM +0200, Ingo Molnar wrote:
>
> * Rafael J. Wysocki <rjw@sisk.pl> wrote:
> > Well, we've been discussing it for quite a while and since more
> > and more people are interested, I'm giving it a high priority.
>
> Cool. I think that if within a few years we could achieve that every
> default distro (both on desktops and on servers) triggers PM
> functionality runtime on common hardware, we'd both have lower power
> consumption in general, and we'd have more robust suspend-resume
> code as well.
The difficulty is in determining when it's viable to autosuspend a given
device. There's a limit to how much we can determine purely from kernel
state (for instance, we could suspend ahci when there's no pending disk
access, but we'd lose hotplug notifications) so there's going to have to
be some level of userspace policy determination. Having the
infrastructure in the kernel is an important part of this, but there'll
be some distance to go after that.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2009-06-08 13:11 UTC|newest]
Thread overview: 199+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-06 22:54 [RFC][PATCH 0/2] PM: Rearrange core suspend code Rafael J. Wysocki
2009-06-06 22:55 ` [RFC][PATCH 1/2] PM: Separate suspend to RAM functionality from core Rafael J. Wysocki
2009-06-06 22:55 ` Rafael J. Wysocki
2009-06-08 6:36 ` Pavel Machek
2009-06-08 6:36 ` Pavel Machek
2009-06-06 22:56 ` [RFC][PATCH 2/2] PM/Hibernate: Rename disk.c to hibernate.c Rafael J. Wysocki
2009-06-06 22:56 ` Rafael J. Wysocki
2009-06-08 6:37 ` Pavel Machek
2009-06-08 6:37 ` Pavel Machek
2009-06-07 20:51 ` [RFC][PATCH 0/2] PM: Rearrange core suspend code Alan Stern
2009-06-07 20:51 ` [linux-pm] " Alan Stern
2009-06-07 21:46 ` Run-time PM idea (was: Re: [RFC][PATCH 0/2] PM: Rearrange core suspend code) Rafael J. Wysocki
2009-06-07 21:46 ` Run-time PM idea (was: Re: [linux-pm] " Rafael J. Wysocki
2009-06-07 22:02 ` Run-time PM idea (was: " Oliver Neukum
2009-06-07 22:02 ` Run-time PM idea (was: Re: [linux-pm] " Oliver Neukum
2009-06-07 22:02 ` Oliver Neukum
2009-06-07 22:05 ` Run-time PM idea (was: " Oliver Neukum
2009-06-07 22:05 ` [linux-pm] " Oliver Neukum
2009-06-08 11:29 ` Rafael J. Wysocki
2009-06-08 11:29 ` [linux-pm] " Rafael J. Wysocki
2009-06-08 12:04 ` Oliver Neukum
2009-06-08 18:34 ` Rafael J. Wysocki
2009-06-09 7:25 ` Oliver Neukum
2009-06-09 7:25 ` [linux-pm] " Oliver Neukum
2009-06-09 14:33 ` Alan Stern
2009-06-09 14:33 ` [linux-pm] " Alan Stern
2009-06-09 14:33 ` Alan Stern
2009-06-09 14:48 ` Oliver Neukum
2009-06-09 14:48 ` Oliver Neukum
2009-06-09 14:48 ` Oliver Neukum
2009-06-09 22:44 ` [linux-pm] " Rafael J. Wysocki
2009-06-09 22:44 ` Rafael J. Wysocki
2009-06-08 18:34 ` Rafael J. Wysocki
2009-06-08 12:04 ` Oliver Neukum
2009-06-08 20:35 ` Alan Stern
2009-06-08 20:35 ` [linux-pm] " Alan Stern
2009-06-08 20:35 ` Alan Stern
2009-06-08 21:31 ` Rafael J. Wysocki
2009-06-09 2:49 ` Alan Stern
2009-06-09 2:49 ` Alan Stern
2009-06-09 22:57 ` Rafael J. Wysocki
2009-06-10 8:29 ` [patch update] " Rafael J. Wysocki
2009-06-10 8:29 ` [patch update] Re: [linux-pm] " Rafael J. Wysocki
2009-06-10 14:20 ` [patch update] " Oliver Neukum
2009-06-10 14:20 ` [patch update] Re: [linux-pm] " Oliver Neukum
2009-06-10 19:27 ` Rafael J. Wysocki
2009-06-10 21:38 ` Oliver Neukum
2009-06-10 21:38 ` Oliver Neukum
2009-06-10 22:01 ` [patch update] " Rafael J. Wysocki
2009-06-10 22:01 ` [patch update] Re: [linux-pm] " Rafael J. Wysocki
2009-06-10 23:07 ` Oliver Neukum
2009-06-10 23:07 ` Oliver Neukum
2009-06-10 23:42 ` [patch update] " Alan Stern
2009-06-10 23:42 ` [patch update] Re: [linux-pm] " Alan Stern
2009-06-10 23:42 ` Alan Stern
2009-06-11 13:48 ` Rafael J. Wysocki
2009-06-11 13:57 ` [patch update] " Oliver Neukum
2009-06-11 13:57 ` [patch update] Re: [linux-pm] " Oliver Neukum
2009-06-11 14:16 ` [patch update] " Alan Stern
2009-06-11 14:16 ` [patch update] Re: [linux-pm] " Alan Stern
2009-06-11 14:16 ` Alan Stern
2009-06-11 19:38 ` [patch update] " Rafael J. Wysocki
2009-06-11 19:38 ` [patch update] Re: [linux-pm] " Rafael J. Wysocki
2009-06-11 13:48 ` [patch update] " Rafael J. Wysocki
2009-06-11 13:46 ` Rafael J. Wysocki
2009-06-11 13:46 ` [patch update] Re: [linux-pm] " Rafael J. Wysocki
2009-06-10 23:07 ` [patch update] " Oliver Neukum
2009-06-10 21:38 ` Oliver Neukum
2009-06-10 19:27 ` Rafael J. Wysocki
2009-06-10 21:14 ` Alan Stern
2009-06-10 21:14 ` [patch update] Re: [linux-pm] " Alan Stern
2009-06-10 21:31 ` [patch update] " Rafael J. Wysocki
2009-06-10 21:31 ` [patch update] Re: [linux-pm] " Rafael J. Wysocki
2009-06-10 23:15 ` [patch update] " Oliver Neukum
2009-06-10 23:15 ` [patch update] Re: [linux-pm] " Oliver Neukum
2009-06-10 23:15 ` Oliver Neukum
2009-06-11 5:27 ` [patch update] " Magnus Damm
2009-06-11 5:27 ` [patch update] Re: [linux-pm] " Magnus Damm
2009-06-11 5:27 ` Magnus Damm
2009-06-10 23:42 ` Alan Stern
2009-06-11 14:17 ` [patch update] " Rafael J. Wysocki
2009-06-11 14:17 ` [patch update] Re: [linux-pm] " Rafael J. Wysocki
2009-06-11 14:52 ` [patch update] " Alan Stern
2009-06-11 14:52 ` [patch update] Re: [linux-pm] " Alan Stern
2009-06-11 15:06 ` Oliver Neukum
2009-06-11 15:06 ` Oliver Neukum
2009-06-11 15:22 ` Alan Stern
2009-06-11 15:22 ` Alan Stern
2009-06-11 16:05 ` Oliver Neukum
2009-06-11 16:05 ` Oliver Neukum
2009-06-11 18:36 ` [patch update] " Alan Stern
2009-06-11 18:36 ` [patch update] Re: [linux-pm] " Alan Stern
2009-06-11 18:36 ` Alan Stern
2009-06-11 21:05 ` [patch update] " Oliver Neukum
2009-06-11 21:05 ` [patch update] Re: [linux-pm] " Oliver Neukum
2009-06-11 21:05 ` Oliver Neukum
2009-06-12 2:16 ` Alan Stern
2009-06-12 2:16 ` Alan Stern
2009-06-12 8:15 ` Oliver Neukum
2009-06-12 14:32 ` [patch update] " Alan Stern
2009-06-12 14:32 ` [patch update] Re: [linux-pm] " Alan Stern
2009-06-12 14:32 ` Alan Stern
2009-06-12 19:09 ` [patch update] " Rafael J. Wysocki
2009-06-12 19:09 ` [patch update] Re: [linux-pm] " Rafael J. Wysocki
2009-06-12 19:48 ` Alan Stern
2009-06-12 19:56 ` [patch update] " Rafael J. Wysocki
2009-06-12 19:56 ` [patch update] Re: [linux-pm] " Rafael J. Wysocki
2009-06-12 21:23 ` Alan Stern
2009-06-12 23:06 ` [patch update] " Rafael J. Wysocki
2009-06-12 23:06 ` [patch update] Re: [linux-pm] " Rafael J. Wysocki
2009-06-13 18:08 ` [patch update] " Alan Stern
2009-06-13 18:08 ` [patch update] Re: [linux-pm] " Alan Stern
2009-06-13 22:04 ` [patch update] " Rafael J. Wysocki
2009-06-13 22:04 ` [patch update] Re: [linux-pm] " Rafael J. Wysocki
2009-06-12 21:23 ` [patch update] " Alan Stern
2009-06-12 19:48 ` Alan Stern
2009-06-12 8:15 ` Oliver Neukum
2009-06-12 2:16 ` Alan Stern
2009-06-11 16:05 ` Oliver Neukum
2009-06-11 15:22 ` Alan Stern
2009-06-11 15:06 ` Oliver Neukum
2009-06-11 19:43 ` Rafael J. Wysocki
2009-06-11 19:43 ` [patch update] Re: [linux-pm] " Rafael J. Wysocki
2009-06-12 14:25 ` [patch update] " Alan Stern
2009-06-12 14:25 ` [patch update] Re: [linux-pm] " Alan Stern
2009-06-10 23:42 ` [patch update] " Alan Stern
2009-06-11 5:18 ` [patch update] Re: [linux-pm] " Magnus Damm
2009-06-11 5:18 ` Magnus Damm
2009-06-11 9:08 ` Oliver Neukum
2009-06-12 3:13 ` [patch update] " Magnus Damm
2009-06-12 3:13 ` [patch update] Re: [linux-pm] " Magnus Damm
2009-06-12 8:11 ` Oliver Neukum
2009-06-12 10:54 ` [patch update] " Magnus Damm
2009-06-12 10:54 ` [patch update] Re: [linux-pm] " Magnus Damm
2009-06-12 10:54 ` Magnus Damm
2009-06-12 8:11 ` [patch update] " Oliver Neukum
2009-06-11 9:08 ` Oliver Neukum
2009-06-11 5:18 ` Magnus Damm
2009-06-10 20:48 ` [linux-pm] " Alan Stern
2009-06-10 20:48 ` Alan Stern
2009-06-10 21:15 ` Rafael J. Wysocki
2009-06-10 21:15 ` [linux-pm] " Rafael J. Wysocki
2009-06-10 20:48 ` Alan Stern
2009-06-09 22:57 ` Rafael J. Wysocki
2009-06-09 2:49 ` Alan Stern
2009-06-09 7:31 ` [linux-pm] " Oliver Neukum
2009-06-09 7:31 ` Oliver Neukum
2009-06-09 23:02 ` Rafael J. Wysocki
2009-06-09 23:02 ` [linux-pm] " Rafael J. Wysocki
2009-06-09 7:31 ` Oliver Neukum
2009-06-08 21:31 ` Rafael J. Wysocki
2009-06-08 6:54 ` Ingo Molnar
2009-06-08 6:54 ` Run-time PM idea (was: Re: [linux-pm] " Ingo Molnar
2009-06-08 11:30 ` Rafael J. Wysocki
2009-06-08 13:05 ` Ingo Molnar
2009-06-08 13:11 ` Matthew Garrett
2009-06-08 13:22 ` Run-time PM idea (was: " Ingo Molnar
2009-06-08 13:22 ` Run-time PM idea (was: Re: [linux-pm] " Ingo Molnar
2009-06-08 13:32 ` Matthew Garrett
2009-06-08 13:46 ` Run-time PM idea (was: " Ingo Molnar
2009-06-08 13:46 ` Run-time PM idea (was: Re: [linux-pm] " Ingo Molnar
2009-06-08 13:54 ` Run-time PM idea (was: " Matthew Garrett
2009-06-08 13:54 ` Run-time PM idea (was: Re: [linux-pm] " Matthew Garrett
2009-06-08 14:24 ` Run-time PM idea (was: " Ingo Molnar
2009-06-08 14:24 ` Run-time PM idea (was: Re: [linux-pm] " Ingo Molnar
2009-06-08 14:35 ` Run-time PM idea (was: " Matthew Garrett
2009-06-08 14:35 ` Run-time PM idea (was: Re: [linux-pm] " Matthew Garrett
2009-06-08 14:44 ` Run-time PM idea (was: " Ingo Molnar
2009-06-08 14:44 ` Run-time PM idea (was: Re: [linux-pm] " Ingo Molnar
2009-06-08 14:51 ` Matthew Garrett
2009-06-24 15:03 ` Run-time PM idea (was: " Pavel Machek
2009-06-24 15:03 ` Run-time PM idea (was: Re: [linux-pm] " Pavel Machek
2009-06-08 14:51 ` Run-time PM idea (was: " Matthew Garrett
2009-06-19 1:50 ` Robert Hancock
2009-06-19 1:50 ` Robert Hancock
2009-06-08 13:58 ` Oliver Neukum
2009-06-08 13:58 ` Run-time PM idea (was: Re: [linux-pm] " Oliver Neukum
2009-06-08 13:58 ` Oliver Neukum
2009-06-08 13:32 ` Run-time PM idea (was: " Matthew Garrett
2009-06-08 13:39 ` Oliver Neukum
2009-06-08 13:39 ` Run-time PM idea (was: Re: [linux-pm] " Oliver Neukum
2009-06-08 13:44 ` Run-time PM idea (was: " Matthew Garrett
2009-06-08 13:44 ` Run-time PM idea (was: Re: [linux-pm] " Matthew Garrett
2009-06-08 14:21 ` Ingo Molnar
2009-06-08 14:30 ` Matthew Garrett
2009-06-08 15:06 ` Run-time PM idea (was: " Ingo Molnar
2009-06-08 15:06 ` Run-time PM idea (was: Re: [linux-pm] " Ingo Molnar
2009-06-08 15:11 ` Matthew Garrett
2009-06-08 15:11 ` Run-time PM idea (was: " Matthew Garrett
2009-06-08 16:29 ` Ray Lee
2009-06-08 16:29 ` Run-time PM idea (was: Re: [linux-pm] " Ray Lee
2009-06-08 16:29 ` Ray Lee
2009-06-08 14:30 ` Run-time PM idea (was: " Matthew Garrett
2009-06-09 22:44 ` Jiri Kosina
2009-06-09 22:44 ` Run-time PM idea (was: Re: [linux-pm] " Jiri Kosina
2009-06-08 14:21 ` Run-time PM idea (was: " Ingo Molnar
2009-06-08 13:11 ` Matthew Garrett [this message]
2009-06-08 13:05 ` Ingo Molnar
2009-06-08 11:30 ` Rafael J. Wysocki
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