linux-kernel - Re: [BUGFIX][PATCH] oom-kill: fix NUMA consraint check with nodemask v4.2

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Message-Id: <20091218083348.c75dbb81.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Fri, 18 Dec 2009 08:33:48 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Christoph Lameter <cl@...ux-foundation.org>
Subject: Re: [BUGFIX][PATCH] oom-kill: fix NUMA consraint check with
 nodemask v4.2

On Thu, 17 Dec 2009 14:23:39 -0800 (PST)
David Rientjes <rientjes@...gle.com> wrote:

> On Tue, 15 Dec 2009, KAMEZAWA Hiroyuki wrote:
> 
> > What I can't undestand is the technique to know whether a (unknown) process is
> > leaking memory or not by checking vm_size.
> 
> Memory leaks are better identified via total_vm since leaked memory has a 
> lower probability of staying resident in physical memory.
> 
Because malloc() writes header on newly allcoated memory, (vm_size - rss) cannot
be far from a some important program  which wakes up once in a
day or sleep in the day works in the night. 

I hope user knows expected memory size of applications, but I know it can't.
Sigh...

Thanks,
-Kame

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