From: Ingo Molnar <mingo@elte.hu>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Alan Stern <stern@rowland.harvard.edu>,
pm list <linux-pm@lists.linux-foundation.org>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Magnus Damm <magnus.damm@gmail.com>
Subject: Re: Run-time PM idea (was: Re: [linux-pm] [RFC][PATCH 0/2] PM: Rearrange core suspend code)
Date: Mon, 8 Jun 2009 15:05:09 +0200 [thread overview]
Message-ID: <20090608130509.GA3272@elte.hu> (raw)
In-Reply-To: <200906081330.50045.rjw@sisk.pl>
* Rafael J. Wysocki <rjw@sisk.pl> wrote:
> On Monday 08 June 2009, Ingo Molnar wrote:
> >
> > * Rafael J. Wysocki <rjw@sisk.pl> wrote:
> >
> > > +config PM_RUNTIME
> > > + bool "Run-time PM core functionality"
> > > + depends on PM
> > > + ---help---
> > > + Enable functionality allowing I/O devices to be put into energy-saving
> > > + (low power) states at run time (or autosuspended) after a specified
> > > + period of inactivity and woken up in response to a hardware-generated
> > > + wake-up event or a driver's request.
> > > +
> > > + Hardware support is generally required for this functionality to work
> > > + and the bus type drivers of the buses the devices are on are
> > > + responsibile for the actual handling of the autosuspend requests and
> > > + wake-up events.
> >
> > Halleluya! :-)
>
> I guess this means you like the general idea. ;-)
>
> 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.
It would also be far more debuggable if the various suspend/resume
bits were triggered and used independently and runtime, allowing
bugs to be 'spread out'. Right now if they fail they fail in a very
hard to debug spot (in the s2ram/s2disk codepaths), which makes
their hacking rather challenging. (which i'm sure you are well aware
of ;-)
So yes, i like the idea, a lot.
Ingo
next prev parent reply other threads:[~2009-06-08 13:05 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 [this message]
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
2009-06-08 13:05 ` Ingo Molnar
2009-06-08 11:30 ` Rafael J. Wysocki
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