From: Daniel Borkmann <danborkmann@googlemail.com>
To: "Bartłomiej Zimoń" <uzi18@o2.pl>
Cc: linux-kernel@vger.kernel.org
Subject: Re: userspace notification from module
Date: Sat, 02 Jan 2010 15:04:20 +0100 [thread overview]
Message-ID: <4B3F5264.7000008@gmail.com> (raw)
In-Reply-To: <686edb2c.6263643a.4b3f4a3b.b60b3@o2.pl>
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Hi Bartłomiej,
Bartłomiej Zimoń wrote:
> Dnia 2 stycznia 2010 13:36 Daniel Borkmann <llug.dan@googlemail.com> napisał(a):
> I will explain more what i'm going to do.
> The idea is simple. Kernel before suspend/resume sends notification to
> registered kernel objects. So i have written small module to register
> there and want now pass these data to /dev/file. It is 1byte so not a big deal.
>
> I'm searching now for notification about new byte in buffer, as it is almost
> clear for async: http://www.xml.com/ldd/chapter/book/ch05.html#t4
> but for sync still haven't find.
This sounds very interesting... a "hack" could be the following:
Register your pids to the kernel module, e.g. via ioctl, and if the
(intra-kernel) notification will be delivered to your module you just
send a signal to your registered processes via kill_proc_info(). Guess
this is at least better than polling a file or sth similar.
I guess netlink could be the "cleaner" solution, but with more overhead?!
Cheers,
Daniel
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next prev parent reply other threads:[~2010-01-02 14:04 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-02 13:29 userspace notification from module Bartłomiej Zimoń
2010-01-02 14:04 ` Daniel Borkmann [this message]
2010-01-02 14:27 ` [suspend/resume] " Bartłomiej Zimoń
2010-01-02 15:11 ` Oliver Neukum
[not found] ` <6f52f5b81001020713j5435cfadr1143806a9026adc2@mail.gmail.com>
2010-01-02 15:15 ` Daniel Borkmann
2010-01-02 15:40 ` Andy Walls
2010-01-02 15:56 ` Daniel Borkmann
2010-01-02 18:26 ` Bartłomiej Zimoń
2010-01-02 21:01 ` Rafael J. Wysocki
[not found] ` <7cf4f51f.5fc2a5cd.4b3fc3ad.c849c@o2.pl>
2010-01-02 23:29 ` Rafael J. Wysocki
2010-01-03 17:20 ` Bartłomiej Zimoń
2010-01-03 21:50 ` Rafael J. Wysocki
[not found] ` <65e5aef6.33251eb4.4b3fecf4.a2f99@o2.pl>
2010-01-03 9:30 ` Daniel Borkmann
2010-01-03 10:06 ` Daniel Borkmann
[not found] ` <43bd3f9d.71702a8b.4b407900.b542@o2.pl>
2010-01-03 21:49 ` Rafael J. Wysocki
2010-01-04 13:38 ` Stefan Seyfried
2010-01-03 21:33 ` Rafael J. Wysocki
2010-01-03 21:29 ` Rafael J. Wysocki
[not found] ` <24fb84fa.38887c91.4b411ffd.e7f1f@o2.pl>
2010-01-03 23:30 ` Rafael J. Wysocki
2010-01-03 23:35 ` Bartłomiej Zimoń
2010-01-03 23:45 ` Rafael J. Wysocki
2010-01-04 0:51 ` Bartłomiej Zimoń
2010-01-04 1:06 ` Bartłomiej Zimoń
2010-01-04 19:43 ` Rafael J. Wysocki
2010-01-05 9:07 ` [linux-pm] " Anders Eriksson
[not found] ` <7e89c5d.77f82021.4b43a8d7.127e1@o2.pl>
2010-01-05 21:23 ` Rafael J. Wysocki
2010-01-05 22:12 ` Bartłomiej Zimoń
2010-01-05 23:03 ` Rafael J. Wysocki
[not found] ` <1ab86ec9.7bc73105.4b43cd45.c2747@o2.pl>
2010-01-06 14:35 ` Anders Eriksson
2010-01-06 20:37 ` [linux-pm] [suspend/resume] Re: userspace notific ation " Bartłomiej Zimoń
2010-01-06 20:49 ` Roland Dreier
2010-01-06 20:56 ` Roland Dreier
2010-01-15 20:02 ` [linux-pm] [suspend/resume] Re: userspace notification " Pavel Machek
2010-01-05 21:26 ` Stefan Seyfried
[not found] ` <11f818a7.4b53f68a.4b43bb9b.b3a7f@o2.pl>
2010-01-05 23:05 ` Rafael J. Wysocki
2010-01-04 12:46 ` Daniel Borkmann
2010-01-04 19:45 ` Rafael J. Wysocki
2010-01-09 10:32 ` Pavel Machek
2010-01-09 13:40 ` Rafael J. Wysocki
2010-01-15 20:03 ` Pavel Machek
2010-01-15 22:14 ` Rafael J. Wysocki
2010-01-16 3:00 ` Eric Miao
2010-01-16 17:00 ` Stanislav Brabec
2010-01-16 18:12 ` Pavel Machek
2010-01-16 22:05 ` Rafael J. Wysocki
2010-01-16 22:19 ` Pavel Machek
2010-01-16 22:25 ` Pavel Machek
2010-01-16 22:31 ` Rafael J. Wysocki
2010-01-16 22:26 ` Rafael J. Wysocki
2010-01-17 13:07 ` Pavel Machek
2010-01-17 13:26 ` Russell King - ARM Linux
2010-01-19 5:15 ` Pavel Machek
2010-01-16 22:32 ` Russell King - ARM Linux
2010-01-16 18:12 ` Pavel Machek
2010-01-16 18:12 ` Pavel Machek
2010-01-16 22:07 ` Rafael J. Wysocki
2010-01-16 22:14 ` Pavel Machek
2010-01-16 22:21 ` Rafael J. Wysocki
2010-01-02 21:20 ` Bartłomiej Zimoń
2010-01-02 14:31 ` Bartłomiej Zimoń
-- strict thread matches above, loose matches on Subject: below --
2010-01-02 12:18 Bartłomiej Zimoń
2010-01-02 12:36 ` Daniel Borkmann
2010-01-02 12:02 Bartłomiej Zimoń
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