From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with SMTP id 135E86B01F2 for ; Wed, 18 Aug 2010 12:20:27 -0400 (EDT) Date: Thu, 19 Aug 2010 00:20:00 +0800 From: Wu Fengguang Subject: Re: Over-eager swapping Message-ID: <20100818162000.GA15859@localhost> References: <20100804022148.GA5922@localhost> <20100804032400.GA14141@localhost> <20100804095811.GC2326@arachsys.com> <20100804114933.GA13527@localhost> <20100804120430.GB23551@arachsys.com> <20100818143801.GA9086@localhost> <20100818144655.GX2370@arachsys.com> <20100818152103.GA11268@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org To: Christoph Lameter Cc: Chris Webb , Minchan Kim , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , KOSAKI Motohiro , Pekka Enberg , Andi Kleen , Lee Schermerhorn List-ID: On Wed, Aug 18, 2010 at 11:57:09PM +0800, Christoph Lameter wrote: > 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. Another possibility is, there are many low watermark page allocations, leading to kswapd page out activities. Thanks, Fengguang -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org