linux-kernel - Re: [RFC][PATCH 3/5] add /dev/mem

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Message-ID: <20080115221627.GC1565@elf.ucw.cz>
Date:	Tue, 15 Jan 2008 23:16:27 +0100
From:	Pavel Machek <pavel@....cz>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Marcelo Tosatti <marcelo@...ck.org>,
	Daniel Spang <daniel.spang@...il.com>,
	Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC][PATCH 3/5] add /dev/mem_notify device

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
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