linux-kernel - Re: [PATCH 4/5] add isolate pages vmstat

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Message-Id: <20090706182750.0C54.A69D9226@jp.fujitsu.com>
Date:	Mon,  6 Jul 2009 18:28:01 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Minchan Kim <minchan.kim@...il.com>
Cc:	kosaki.motohiro@...fujitsu.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>,
	Christoph Lameter <cl@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Rik van Riel <riel@...hat.com>
Subject: Re: [PATCH 4/5] add isolate pages vmstat

> > ? ? ? ?printk("Active_anon:%lu active_file:%lu inactive_anon:%lu\n"
> > - ? ? ? ? ? ? ? " inactive_file:%lu"
> > - ? ? ? ? ? ? ? " unevictable:%lu"
> > + ? ? ? ? ? ? ? " inactive_file:%lu unevictable:%lu isolated:%lu\n"
> 
> It's good.
> I have a one suggestion.
> 
> I know this patch came from David's OOM problem a few days ago.
> 
> I think total pages isolated of all lru doesn't help us much.
> It just represents why [in]active[anon/file] is zero.
> 
> How about adding isolate page number per each lru ?
> 
> IsolatedPages(file)
> IsolatedPages(anon)
> 
> It can help knowing exact number of each lru.

Good suggestion!
Will fix.


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