From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with SMTP id B8AB86B01AC for ; Thu, 25 Mar 2010 07:22:15 -0400 (EDT) Received: from m3.gw.fujitsu.co.jp ([10.0.50.73]) by fgwmail7.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id o2PBMCgs030004 for (envelope-from kosaki.motohiro@jp.fujitsu.com); Thu, 25 Mar 2010 20:22:12 +0900 Received: from smail (m3 [127.0.0.1]) by outgoing.m3.gw.fujitsu.co.jp (Postfix) with ESMTP id DBAE545DE4F for ; Thu, 25 Mar 2010 20:22:11 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (s3.gw.fujitsu.co.jp [10.0.50.93]) by m3.gw.fujitsu.co.jp (Postfix) with ESMTP id B5AAA45DE4E for ; Thu, 25 Mar 2010 20:22:11 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id 8979BEF8004 for ; Thu, 25 Mar 2010 20:22:11 +0900 (JST) Received: from m107.s.css.fujitsu.com (m107.s.css.fujitsu.com [10.249.87.107]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id 3F274E38007 for ; Thu, 25 Mar 2010 20:22:11 +0900 (JST) From: KOSAKI Motohiro Subject: Re: [PATCH 10/11] Direct compact when a high-order allocation fails In-Reply-To: <20100319101016.GS12388@csn.ul.ie> References: <20100319152516.8778.A69D9226@jp.fujitsu.com> <20100319101016.GS12388@csn.ul.ie> Message-Id: <20100325202145.6C92.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Date: Thu, 25 Mar 2010 20:22:10 +0900 (JST) Sender: owner-linux-mm@kvack.org To: Mel Gorman Cc: kosaki.motohiro@jp.fujitsu.com, Andrew Morton , Andrea Arcangeli , Christoph Lameter , Adam Litke , Avi Kivity , David Rientjes , Rik van Riel , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: > > Viewpoint 5. end user surprising > > > > lumpy reclaim can makes swap-out even though the system have lots free > > memory. end users very surprised it and they can think it is bug. > > > > Also, this swap activity easyly confuse that an administrator decide when > > install more memory into the system. > > > > Compaction in this case is a lot less surprising. If there is enough free > memory, compaction will trigger automatically without any reclaim. I fully agree this. -- 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