From: Pavel Machek <pavel@ucw.cz>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Marcelo Tosatti <marcelo@kvack.org>,
Daniel Spang <daniel.spang@gmail.com>,
Rik van Riel <riel@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [RFC][PATCH 3/5] add /dev/mem_notify device
Date: Tue, 15 Jan 2008 23:16:27 +0100 [thread overview]
Message-ID: <20080115221627.GC1565@elf.ucw.cz> (raw)
In-Reply-To: <20080115100029.1178.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Hi!
> the core of this patch series.
> add /dev/mem_notify device for notification low memory to user process.
>
> <usage examle>
>
> fd = open("/dev/mem_notify", O_RDONLY);
> if (fd < 0) {
> exit(1);
> }
> pollfds.fd = fd;
> pollfds.events = POLLIN;
> pollfds.revents = 0;
> err = poll(&pollfds, 1, -1); // wake up at low memory
>
> ...
> </usage example>
Nice, this is really needed for openmoko, zaurus, etc....
But this changelog needs to go into Documentation/...
...and /dev/mem_notify is really a bad name. /dev/memory_low?
/dev/oom?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
WARNING: multiple messages have this Message-ID (diff)
From: Pavel Machek <pavel@ucw.cz>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Marcelo Tosatti <marcelo@kvack.org>,
Daniel Spang <daniel.spang@gmail.com>,
Rik van Riel <riel@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [RFC][PATCH 3/5] add /dev/mem_notify device
Date: Tue, 15 Jan 2008 23:16:27 +0100 [thread overview]
Message-ID: <20080115221627.GC1565@elf.ucw.cz> (raw)
In-Reply-To: <20080115100029.1178.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Hi!
> the core of this patch series.
> add /dev/mem_notify device for notification low memory to user process.
>
> <usage examle>
>
> fd = open("/dev/mem_notify", O_RDONLY);
> if (fd < 0) {
> exit(1);
> }
> pollfds.fd = fd;
> pollfds.events = POLLIN;
> pollfds.revents = 0;
> err = poll(&pollfds, 1, -1); // wake up at low memory
>
> ...
> </usage example>
Nice, this is really needed for openmoko, zaurus, etc....
But this changelog needs to go into Documentation/...
...and /dev/mem_notify is really a bad name. /dev/memory_low?
/dev/oom?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
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next prev parent reply other threads:[~2008-01-15 22:16 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-15 0:52 [RFC][PATCH 0/5] mem notifications v4 KOSAKI Motohiro
2008-01-15 0:52 ` KOSAKI Motohiro
2008-01-15 0:59 ` [RFC][PATCH 1/5] introduce poll_wait_exclusive() new API KOSAKI Motohiro
2008-01-15 0:59 ` KOSAKI Motohiro
2008-01-15 1:00 ` [RFC][PATCH 2/5] introduce wake_up_locked_nr() " KOSAKI Motohiro
2008-01-15 1:00 ` KOSAKI Motohiro
2008-01-15 1:01 ` [RFC][PATCH 3/5] add /dev/mem_notify device KOSAKI Motohiro
2008-01-15 1:01 ` KOSAKI Motohiro
2008-01-15 1:08 ` Randy Dunlap
2008-01-15 1:08 ` Randy Dunlap
2008-01-15 1:20 ` KOSAKI Motohiro
2008-01-15 1:20 ` KOSAKI Motohiro
2008-01-15 1:24 ` KOSAKI Motohiro
2008-01-15 1:24 ` KOSAKI Motohiro
2008-01-15 2:10 ` KAMEZAWA Hiroyuki
2008-01-15 2:10 ` KAMEZAWA Hiroyuki
2008-01-15 2:20 ` KOSAKI Motohiro
2008-01-15 2:20 ` KOSAKI Motohiro
2008-01-15 2:56 ` Rik van Riel
2008-01-15 2:56 ` Rik van Riel
2008-01-15 10:46 ` Alan Cox
2008-01-15 10:46 ` Alan Cox
2008-01-15 10:59 ` KOSAKI Motohiro
2008-01-15 10:59 ` KOSAKI Motohiro
2008-01-15 11:20 ` Alan Cox
2008-01-15 11:20 ` Alan Cox
2008-01-15 11:48 ` KOSAKI Motohiro
2008-01-15 11:48 ` KOSAKI Motohiro
2008-01-15 13:42 ` Alan Cox
2008-01-15 13:42 ` Alan Cox
2008-01-16 2:43 ` KOSAKI Motohiro
2008-01-16 2:43 ` KOSAKI Motohiro
2008-01-15 12:05 ` Marcelo Tosatti
2008-01-15 12:05 ` Marcelo Tosatti
2008-01-15 13:42 ` Alan Cox
2008-01-15 13:42 ` Alan Cox
2008-01-15 22:16 ` Pavel Machek [this message]
2008-01-15 22:16 ` Pavel Machek
2008-01-16 1:57 ` KOSAKI Motohiro
2008-01-16 1:57 ` KOSAKI Motohiro
2008-01-16 4:13 ` Marcelo Tosatti
2008-01-16 4:13 ` Marcelo Tosatti
2008-01-16 11:42 ` Pavel Machek
2008-01-16 11:42 ` Pavel Machek
2008-01-16 11:51 ` Daniel Spång
2008-01-16 11:51 ` Daniel Spång
2008-01-17 3:04 ` KOSAKI Motohiro
2008-01-17 3:04 ` KOSAKI Motohiro
2008-01-15 1:02 ` [RFC][PATCH 4/5] memory_pressure_notify() caller KOSAKI Motohiro
2008-01-15 1:02 ` KOSAKI Motohiro
2008-01-15 2:06 ` KAMEZAWA Hiroyuki
2008-01-15 2:06 ` KAMEZAWA Hiroyuki
2008-01-15 2:37 ` KOSAKI Motohiro
2008-01-15 2:37 ` KOSAKI Motohiro
2008-01-15 3:00 ` KAMEZAWA Hiroyuki
2008-01-15 3:00 ` KAMEZAWA Hiroyuki
2008-01-15 3:08 ` KOSAKI Motohiro
2008-01-15 3:08 ` KOSAKI Motohiro
2008-01-15 22:55 ` Daniel Spång
2008-01-15 22:55 ` Daniel Spång
2008-01-15 22:59 ` Rik van Riel
2008-01-15 22:59 ` Rik van Riel
2008-01-15 23:39 ` Daniel Spång
2008-01-15 23:39 ` Daniel Spång
2008-01-16 1:48 ` KOSAKI Motohiro
2008-01-16 1:48 ` KOSAKI Motohiro
2008-01-16 11:03 ` Daniel Spång
2008-01-17 3:26 ` KOSAKI Motohiro
2008-01-17 3:26 ` KOSAKI Motohiro
2008-01-18 10:24 ` Daniel Spång
2008-01-18 10:24 ` Daniel Spång
2008-01-18 10:30 ` KOSAKI Motohiro
2008-01-18 10:30 ` KOSAKI Motohiro
2008-01-15 1:03 ` [RFC][PATCH 5/5] /proc/zoneinfo enhancement KOSAKI Motohiro
2008-01-15 1:03 ` KOSAKI Motohiro
2008-01-15 10:44 ` Alan Cox
2008-01-15 10:44 ` Alan Cox
2008-01-15 10:49 ` KOSAKI Motohiro
2008-01-15 10:49 ` KOSAKI Motohiro
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