Date: Wed, 18 Aug 2010 10:57:09 -0500 (CDT)
From: Christoph Lameter <cl@linux-foundation.org>
To: Wu Fengguang <fengguang.wu@intel.com>
cc: Chris Webb <chris@arachsys.com>, Minchan Kim <minchan.kim@gmail.com>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
        Pekka Enberg <penberg@cs.helsinki.fi>,
        Andi Kleen <andi@firstfloor.org>,
        Lee Schermerhorn <lee.schermerhorn@hp.com>
Subject: Re: Over-eager swapping
In-Reply-To: <20100818152103.GA11268@localhost>
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References: <20100803042835.GA17377@localhost> <20100803214945.GA2326@arachsys.com> <20100804022148.GA5922@localhost> <AANLkTi=wRPXY9BTuoCe_sDCwhnRjmmwtAf_bjDKG3kXQ@mail.gmail.com> <20100804032400.GA14141@localhost> <20100804095811.GC2326@arachsys.com>
 <20100804114933.GA13527@localhost> <20100804120430.GB23551@arachsys.com> <20100818143801.GA9086@localhost> <20100818144655.GX2370@arachsys.com> <20100818152103.GA11268@localhost>
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On Wed, 18 Aug 2010, Wu Fengguang wrote:

> Andi, Christoph and Lee:
>
> This looks like an "unbalanced NUMA memory usage leading to premature
> swapping" problem.

Is zone reclaim active? It may not activate on smaller systems leading
to an unbalance memory usage between node.


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