linux-kernel - Re: [PATCH 5/5] add NR_ANON

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Date:	Thu,  9 Jul 2009 14:50:09 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Christoph Lameter <cl@...ux-foundation.org>
Cc:	kosaki.motohiro@...fujitsu.com,
	Minchan Kim <minchan.kim@...il.com>,
	Wu Fengguang <fengguang.wu@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Rik van Riel <riel@...hat.com>
Subject: Re: [PATCH 5/5] add NR_ANON_PAGES to OOM log

> On Mon, 6 Jul 2009, Minchan Kim wrote:
> 
> > Anyway, I think it's not a big cost in normal system.
> > So If you want to add new accounting, I don't have any objection. :)
> 
> Lets keep the counters to a mininum. If we can calculate the values from
> something else then there is no justification for a new counter.
> 
> A new counter increases the size of the per cpu structures that exist for
> each zone and each cpu. 1 byte gets multiplies by the number of cpus and
> that gets multiplied by the number of zones.

OK. I'll implement this idea.



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