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 C2BF86B003D for ; Thu, 10 Dec 2009 02:53:32 -0500 (EST) Received: from m5.gw.fujitsu.co.jp ([10.0.50.75]) by fgwmail6.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id nBA7rQoX021119 for (envelope-from kosaki.motohiro@jp.fujitsu.com); Thu, 10 Dec 2009 16:53:26 +0900 Received: from smail (m5 [127.0.0.1]) by outgoing.m5.gw.fujitsu.co.jp (Postfix) with ESMTP id 007692AEA81 for ; Thu, 10 Dec 2009 16:53:26 +0900 (JST) Received: from s5.gw.fujitsu.co.jp (s5.gw.fujitsu.co.jp [10.0.50.95]) by m5.gw.fujitsu.co.jp (Postfix) with ESMTP id D6CFA1EF081 for ; Thu, 10 Dec 2009 16:53:25 +0900 (JST) Received: from s5.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s5.gw.fujitsu.co.jp (Postfix) with ESMTP id BDC971DB803C for ; Thu, 10 Dec 2009 16:53:25 +0900 (JST) Received: from m107.s.css.fujitsu.com (m107.s.css.fujitsu.com [10.249.87.107]) by s5.gw.fujitsu.co.jp (Postfix) with ESMTP id 636EF1DB805D for ; Thu, 10 Dec 2009 16:53:25 +0900 (JST) From: KOSAKI Motohiro Subject: Re: [RFC][PATCH v2 0/8] vmscan: AIM7 scalability improvement In-Reply-To: <20091210154822.2550.A69D9226@jp.fujitsu.com> References: <20091210154822.2550.A69D9226@jp.fujitsu.com> Message-Id: <20091210165208.256B.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Date: Thu, 10 Dec 2009 16:53:24 +0900 (JST) Sender: owner-linux-mm@kvack.org To: KOSAKI Motohiro Cc: LKML , linux-mm , Rik van Riel , Andrea Arcangeli , Larry Woodman List-ID: > Larry Woodman reported current VM has big performance regression when > AIM7 benchmark. It use very much processes and fork/exit/page-fault frequently. > (i.e. it makes serious lock contention of ptelock and anon_vma-lock.) > > At 2.6.28, we removed calc_reclaim_mapped() and it made vmscan, then > vmscan always call page_referenced() although VM pressure is low. > It increased lock contention more, unfortunately. > > > Larry, can you please try this patch series on your big box? this patches is made ontop mmotm1208. -- 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