From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 2 May 2002 11:34:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 2 May 2002 11:34:49 -0400 Received: from penguin.e-mind.com ([195.223.140.120]:5180 "EHLO penguin.e-mind.com") by vger.kernel.org with ESMTP id ; Thu, 2 May 2002 11:34:48 -0400 Date: Thu, 2 May 2002 17:35:22 +0200 From: Andrea Arcangeli To: "Martin J. Bligh" Cc: Daniel Phillips , Russell King , linux-kernel@vger.kernel.org Subject: Re: Bug: Discontigmem virt_to_page() [Alpha,ARM,Mips64?] Message-ID: <20020502173522.F11414@dualathlon.random> In-Reply-To: <20020502153402.A11414@dualathlon.random> <3968942217.1020327505@[10.10.2.3]> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.3.22.1i X-GnuPG-Key-URL: http://e-mind.com/~andrea/aa.gnupg.asc X-PGP-Key-URL: http://e-mind.com/~andrea/aa.asc Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 02, 2002 at 08:18:33AM -0700, Martin J. Bligh wrote: > > alpha is the same as mips I think. sparc would be the same too if > > there's any discontigmem sparc. Dunno of arm. We're talking about > > architectures needing discontigmem, 99% percent of users doesn't need > > discontigmem in the first place, you never need discontigmem in x86 and > > That's not true. We use discontigmem on the NUMA-Q boxes for NUMA support. > In some memory models, they're also really discontigous memory machines. With numa-q there's a 512M hole in each node IIRC. that's fine configuration, similar to the wildfire btw. > At the moment I use the contig memory model (so we only use discontig for > NUMA support) but I may need to change that in the future. I wasn't thinking at numa-q, but regardless numa-Q fits perfectly into the current discontigmem-numa model too as far I can see. Andrea