From: Bastien Nocera <hadess@hadess.net>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: John Stultz <john.stultz@linaro.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: A desktop environment[1] kernel wishlist
Date: Mon, 27 Oct 2014 15:20:57 +0100 [thread overview]
Message-ID: <1414419657.30379.51.camel@hadess.net> (raw)
In-Reply-To: <CAMuHMdWw+rX-r2uVN0ZL-GFirOkCn7+Gh7BVd3JvyXXS_pcdVw@mail.gmail.com>
On Tue, 2014-10-21 at 20:24 +0200, Geert Uytterhoeven wrote:
> On Tue, Oct 21, 2014 at 7:14 PM, Bastien Nocera <hadess@hadess.net> wrote:
> >> As for: 'Export of "wake reason" when the system wakes up (rtc alarm,
> >> lid open, etc.) and wakealarm (/sys/class/rtc/foo/wakealarm)
> >> documentation'
> >>
> >> Can you expand more on the rational for the need here? Is this for UI
> >> for power debugging, or something else?
> >
> > No, it would be used for automating backups, or implementing
> > suspend->hibernation transitions. For example, right before the machine
> > suspends, I would schedule it to wake up in a hour. If I get woken up by
> > the rtc alarm (and not by the user through a lid open), I might:
> > - check that I'm plugged into the AC, it's night, and in the vicinity of
> > the server that handles my backups and so backup the system.
> > - check whether the battery is low, and hibernate the machine (if it
> > supports it, obviously).
>
> Isn't this already available through /sys/kernel/debug/wakeup_sources
> and/or the various power/wake* files in sysfs?
That might very well be, but /sys/kernel/debug/wakeup_sources really
isn't much of a user-space API. Where's the documentation for the
various power/wake* files?
As in my mail to John, that information might already be available
within the kernel, but it's not exported in a sensible way to
user-space.
next prev parent reply other threads:[~2014-10-27 14:21 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-21 8:49 A desktop environment[1] kernel wishlist Bastien Nocera
2014-10-21 13:11 ` Sergey
2014-10-22 2:58 ` Minchan Kim
2014-10-22 16:52 ` Dan Streetman
2014-10-22 20:16 ` Heinrich Schuchardt
2014-10-27 16:11 ` Sergey "Shnatsel" Davidoff
2014-10-27 9:23 ` Pavel Machek
2014-10-27 16:02 ` Sergey "Shnatsel" Davidoff
2014-10-31 9:36 ` Jan Kara
2014-11-03 18:21 ` Heinrich Schuchardt
2014-11-04 9:28 ` Jan Kara
2014-11-04 19:55 ` Heinrich Schuchardt
2014-11-05 17:18 ` Jan Kara
2014-10-21 17:04 ` John Stultz
2014-10-21 17:14 ` Bastien Nocera
2014-10-21 18:00 ` John Stultz
2014-10-21 18:09 ` Bastien Nocera
2014-10-21 19:10 ` John Stultz
2014-10-27 14:19 ` Bastien Nocera
2014-10-27 16:56 ` John Stultz
2014-10-28 22:57 ` One Thousand Gnomes
2014-10-30 14:41 ` Bastien Nocera
2014-10-30 23:39 ` One Thousand Gnomes
2014-10-31 14:03 ` Bastien Nocera
2014-11-03 14:17 ` One Thousand Gnomes
2014-10-30 14:35 ` Bastien Nocera
2014-10-30 23:25 ` One Thousand Gnomes
2014-10-31 14:01 ` Bastien Nocera
2014-11-21 19:08 ` Pavel Machek
2014-10-21 19:23 ` Andy Lutomirski
2014-10-22 17:04 ` Zygo Blaxell
2014-10-27 14:28 ` Bastien Nocera
2014-10-27 20:59 ` Zygo Blaxell
2014-10-28 12:36 ` Bastien Nocera
2014-10-28 14:36 ` John Stultz
2014-10-31 13:54 ` Bastien Nocera
2014-10-31 17:38 ` John Stultz
[not found] ` <CANszf4gaozN9YHzxUToRP9CaA1VVEV9vcz_X6LDL1zW3fH4Fow@mail.gmail.com>
2014-10-28 16:41 ` Fwd: " Rogelio Serrano
2014-10-27 9:28 ` Pavel Machek
2014-10-27 14:31 ` Bastien Nocera
2014-10-28 18:50 ` suspend to partition " Pavel Machek
2014-10-30 13:57 ` Bastien Nocera
2014-10-29 19:19 ` Andy Lutomirski
2014-10-29 20:26 ` Theodore Ts'o
2014-10-29 21:16 ` Pavel Machek
2014-10-30 14:45 ` Bastien Nocera
2014-10-30 14:53 ` Andy Lutomirski
2014-10-30 15:07 ` Bastien Nocera
2014-10-30 18:23 ` Pavel Machek
2014-10-31 13:57 ` Bastien Nocera
2014-10-30 15:05 ` Theodore Ts'o
2014-10-30 15:15 ` Bastien Nocera
2014-10-30 15:34 ` Theodore Ts'o
2014-10-30 15:36 ` Bastien Nocera
2014-10-30 17:41 ` Pavel Machek
2014-10-31 13:59 ` Bastien Nocera
2014-10-30 23:21 ` One Thousand Gnomes
2014-10-30 23:19 ` One Thousand Gnomes
2014-10-30 14:42 ` Bastien Nocera
2014-10-28 22:42 ` One Thousand Gnomes
2014-10-21 18:24 ` Geert Uytterhoeven
2014-10-27 14:20 ` Bastien Nocera [this message]
2014-10-27 15:31 ` Geert Uytterhoeven
2014-10-27 15:44 ` Bastien Nocera
2015-04-30 16:25 ` Bastien Nocera
2015-04-30 17:10 ` John Stultz
2015-04-30 17:23 ` Olof Johansson
2015-04-30 18:54 ` Chirantan Ekbote
2015-05-01 9:02 ` Tomeu Vizoso
2015-05-04 22:19 ` Rafael J. Wysocki
2015-05-05 6:05 ` Tomeu Vizoso
2015-05-05 12:31 ` Rafael J. Wysocki
2015-05-07 16:54 ` One Thousand Gnomes
2015-05-07 21:03 ` Rafael J. Wysocki
2015-05-08 7:09 ` Tomeu Vizoso
2015-05-04 22:12 ` Rafael J. Wysocki
2015-05-04 23:30 ` Chirantan Ekbote
2015-05-05 10:46 ` Bastien Nocera
2015-05-05 19:22 ` Chirantan Ekbote
2015-05-06 12:41 ` Bastien Nocera
2015-05-05 14:39 ` Alan Stern
2015-05-05 17:58 ` Chirantan Ekbote
2015-05-05 19:35 ` Alan Stern
2015-05-05 20:58 ` Chirantan Ekbote
2015-05-05 23:56 ` Rafael J. Wysocki
2015-05-05 23:38 ` David Lang
2015-05-05 23:51 ` Rafael J. Wysocki
2015-05-07 17:03 ` One Thousand Gnomes
2015-05-07 18:21 ` Chirantan Ekbote
2015-05-05 23:47 ` Rafael J. Wysocki
2015-05-06 17:40 ` Chirantan Ekbote
2015-05-07 23:19 ` Rafael J. Wysocki
2015-05-11 22:12 ` Pavel Machek
2015-05-12 0:45 ` Rafael J. Wysocki
2014-10-21 19:28 ` Andy Lutomirski
2014-10-21 19:43 ` Al Viro
2014-10-21 19:47 ` Andy Lutomirski
2014-10-27 13:55 ` Bastien Nocera
2014-10-27 15:12 ` Andy Lutomirski
2014-10-27 15:45 ` Bastien Nocera
2014-10-27 16:08 ` Andy Lutomirski
2014-10-27 16:09 ` Bastien Nocera
2014-10-27 16:22 ` Al Viro
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