Date: Wed, 18 Aug 2010 17:32:03 +0100
From: Chris Webb <chris@arachsys.com>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
        Wu Fengguang <fengguang.wu@intel.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>
Subject: Re: Over-eager swapping
Message-ID: <20100818163203.GD2370@arachsys.com>
References: <20100804032400.GA14141@localhost>
 <20100804095811.GC2326@arachsys.com>
 <20100804114933.GA13527@localhost>
 <20100804120430.GB23551@arachsys.com>
 <20100818143801.GA9086@localhost>
 <20100818144655.GX2370@arachsys.com>
 <20100818152103.GA11268@localhost>
 <1282147034.77481.33.camel@useless.localdomain>
 <20100818155825.GA2370@arachsys.com>
 <alpine.DEB.2.00.1008181112510.6294@router.home>
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Christoph Lameter <cl@linux-foundation.org> writes:

> On Wed, 18 Aug 2010, Chris Webb wrote:
> 
> > > != 0.  And even then, zone reclaim should only reclaim file pages, not
> > > anon.  In theory...
> >
> > Hi. This is zero on all our machines:
> >
> > # sysctl vm.zone_reclaim_mode
> > vm.zone_reclaim_mode = 0
> 
> Set it to 1.

I'll try this tonight: setting this to one and readding swap on one of the
problem machines.

Best wishes,

Chris.
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