From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 1 May 2002 21:33:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 1 May 2002 21:33:02 -0400 Received: from oss.SGI.COM ([128.167.58.27]:50065 "EHLO oss.sgi.com") by vger.kernel.org with ESMTP id ; Wed, 1 May 2002 21:33:01 -0400 Date: Wed, 1 May 2002 18:32:50 -0700 From: Ralf Baechle To: Andrea Arcangeli Cc: Daniel Phillips , Russell King , linux-kernel@vger.kernel.org Subject: Re: discontiguous memory platforms Message-ID: <20020501183250.A31464@dea.linux-mips.net> In-Reply-To: <20020426192711.D18350@flint.arm.linux.org.uk> <20020429153500.B28887@dualathlon.random> <20020501042341.G11414@dualathlon.random> <20020501180547.GA1212440@sgi.com> <20020502011750.M11414@dualathlon.random> <20020501232343.GA1214171@sgi.com> <20020501175133.A30649@dea.linux-mips.net> <20020502032725.S11414@dualathlon.random> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i X-Accept-Language: de,en,fr Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 02, 2002 at 03:27:25AM +0200, Andrea Arcangeli wrote: > > - 256MB at physical address 0 > > - 512MB at physical address 0x80000000 > > - 256MB at physical address 0xc0000000 > > - The entire rest of the memory is mapped contiguously from physical > > address 0x1:00000000 up. > > All available memory is mapped from the lowest address up. > > Is this a numa? If not then you should be just perfectly fine with > discontigmem with this chip. This is a system on a chip with memory controllers on die. In theory multiple of it can be combined to brew some crude ccNUMA system but I don't know if people are actually doing that. Ralf