From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 17 Oct 2007 15:44:03 +0900 From: KAMEZAWA Hiroyuki Subject: Re: about page migration on UMA Message-Id: <20071017154403.7712262c.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <02f001c8108c$a3818760$3708a8c0@arcapub.arca.com> References: <20071016191949.cd50f12f.kamezawa.hiroyu@jp.fujitsu.com> <20071016192341.1c3746df.kamezawa.hiroyu@jp.fujitsu.com> <20071017141609.0eb60539.kamezawa.hiroyu@jp.fujitsu.com> <20071017145009.e4a56c0d.kamezawa.hiroyu@jp.fujitsu.com> <02f001c8108c$a3818760$3708a8c0@arcapub.arca.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: "Jacky(GuangXiang Lee)" Cc: climeter@sgi.com, linux-mm@kvack.org List-ID: On Wed, 17 Oct 2007 15:09:19 +0800 "Jacky(GuangXiang Lee)" wrote: > seems page migration is used mostly for NUMA platform to improve > performance. > But in a UMA architecture, Is it possible to use page migration to move > pages ? > Currently no usage. but someone (Mel ?) will use migration code to do page defragmentation. In that case, migration will be used. For memory hot remove, we will need to enable migration on UMA. (but I don't hear requests to do that...) But, sys_move_pages() will not work on UMA. Thanks, -Kame -- 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