From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by wa-out-1112.google.com with SMTP id m33so805247wag for ; Fri, 09 Nov 2007 11:31:05 -0800 (PST) Message-ID: <6934efce0711091131n1acd2ce1h7bb17f9f3cb0f235@mail.gmail.com> Date: Fri, 9 Nov 2007 11:31:05 -0800 From: "Jared Hulbert" Subject: Re: about page migration on UMA In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline 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> Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: "Jacky(GuangXiang Lee)" , climeter@sgi.com, linux-mm@kvack.org List-ID: On 10/18/07, Christoph Lameter wrote: > On Wed, 17 Oct 2007, 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 ? > > Yes. Just one up with a usage for it. The page migration mechanism itself > is not NUMA dependent. For extreme low power systems it would be possible to shut down banks in SDRAM chips that were not full thereby saving power. That would require some defraging and migration to empty them prior to powering down those banks. -- 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