Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754284AbYJAWib (ORCPT ); Wed, 1 Oct 2008 18:38:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754252AbYJAWiS (ORCPT ); Wed, 1 Oct 2008 18:38:18 -0400 Received: from gw.goop.org ([64.81.55.164]:57198 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754172AbYJAWiQ (ORCPT ); Wed, 1 Oct 2008 18:38:16 -0400 Message-ID: <48E3FBCE.8030103@goop.org> Date: Wed, 01 Oct 2008 15:38:06 -0700 From: Jeremy Fitzhardinge User-Agent: Thunderbird 2.0.0.16 (X11/20080919) MIME-Version: 1.0 To: Gene Heskett CC: linux-kernel@vger.kernel.org Subject: Re: How to make all of 4GB of memory available? References: <200810011417.00595.gene.heskett@gmail.com> In-Reply-To: <200810011417.00595.gene.heskett@gmail.com> X-Enigmail-Version: 0.95.6 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 833 Lines: 22 Gene Heskett wrote: > Greetings; > > New mobo, 4 core AMD Phenom cpu & 4 GB of dram. I cannot find the switch in a > make xconfig that will allow use of all of it, I am only seeing 3GB. > > Am I going blind in my dotage? Does it all appear in the e820 map? If not, then the chipset is probably masking it; check to see if there's any likely-looking BIOS options to make it appear. I assume you're compiling for either 32-bit PAE or 64-bit. If you're compiling 32-bit without PAE (HIGHMEM64G) then the remaining Gbyte may simply be above 4G and out of the kernel's reach. J -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/