linux-kernel - Re: [RFC][PATCH] oom_kill: avoid depends on total_vm and use real RSS/swap value for oom

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Message-ID: <20091105190203.GA1392@ucw.cz>
Date:	Thu, 5 Nov 2009 20:02:03 +0100
From:	Pavel Machek <pavel@....cz>
To:	Andrea Arcangeli <aarcange@...hat.com>
Cc:	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Minchan Kim <minchan.kim@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	vedran.furac@...il.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	rientjes@...gle.com
Subject: Re: [RFC][PATCH] oom_kill: avoid depends on total_vm and use real
	RSS/swap value for oom_score (Re: Memory overcommit

Hi!

> Agreed it's not obvious. Intuitively I think only including RSS and no
> swap is best, but clearly I can't be entirely against including swap
> too as there may be scenarios where including swap provides for a
> better choice.
> 
> My argument for not including swap is that we kill tasks to free RAM
> (we don't really care to free swap, system needs RAM at oom time).

System should be out of _virtual_ memory at that point, so yes,
freeing swap should help, too.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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