linux-kernel - Re: Over-eager swapping

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Message-ID: <20100818143801.GA9086@localhost>
Date:	Wed, 18 Aug 2010 22:38:01 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Chris Webb <chris@...chsys.com>
Cc:	Minchan Kim <minchan.kim@...il.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: Over-eager swapping

Chris,

Did you enable any NUMA policy? That could start swapping even if
there are lots of free pages in some nodes.

Are your free pages equally distributed over the nodes? Or limited to
some of the nodes? Try this command:

        grep MemFree /sys/devices/system/node/node*/meminfo

Thanks,
Fengguang
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