Date: Thu, 9 Jul 2009 16:43:02 -0400 (EDT)
From: Christoph Lameter <cl@linux-foundation.org>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
cc: LKML <linux-kernel@vger.kernel.org>, linux-mm <linux-mm@kvack.org>,
       Andrew Morton <akpm@linux-foundation.org>,
       Wu Fengguang <fengguang.wu@intel.com>,
       David Rientjes <rientjes@google.com>, Rik van Riel <riel@redhat.com>,
       Hugh Dickins <hugh.dickins@tiscali.co.uk>
Subject: Re: [PATCH 4/5] add isolate pages vmstat
In-Reply-To: <20090709171247.23C6.A69D9226@jp.fujitsu.com>
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References: <20090709165820.23B7.A69D9226@jp.fujitsu.com> <20090709171247.23C6.A69D9226@jp.fujitsu.com>
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On Thu, 9 Jul 2009, KOSAKI Motohiro wrote:

> Subject: [PATCH] add isolate pages vmstat
>
> If the system have plenty threads or processes, concurrent reclaim can
> isolate very much pages.
> Unfortunately, current /proc/meminfo and OOM log can't show it.

"
If the system is running a heavy load of processes then concurrent reclaim
can isolate a large numbe of pages from the LRU. /proc/meminfo and the
output generated for an OOM do not show how many pages were isolated.
"

> This patch provide the way of showing this information.

"
This patch shows the information about isolated pages.
"


Page migration can also isolate a large number of pages from the LRU. But
the new counters are not used there.

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