From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 15 Nov 2007 14:12:12 -0800 From: Andrew Morton Subject: Re: x86_64: Make sparsemem/vmemmap the default memory model Message-Id: <20071115141212.acb215f1.akpm@linux-foundation.org> In-Reply-To: References: <200711130059.34346.ak@suse.de> <200711130149.54852.ak@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, mel@csn.ul.ie, ak@suse.de, apw@shadowen.org List-ID: On Mon, 12 Nov 2007 19:42:31 -0800 (PST) Christoph Lameter wrote: > x86_64: Make sparsemem/vmemmap the default memory model > > Use sparsemem as the only memory model for UP, SMP and NUMA. > Measurements indicate that DISCONTIGMEM has a higher overhead > than sparsemem. And FLATMEMs benefits are minimal. So I think its > best to simply standardize on sparsemem. Unfortunately some loon has gone and merged the i386 and x86_64 Kconfig files. I was fixing that up but I worry what effects these Kconfig changes might have on, for example, i386 NUMA setups. So I'll duck this version, sorry. -- 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