Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268019AbUIPMQf (ORCPT ); Thu, 16 Sep 2004 08:16:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268026AbUIPMQf (ORCPT ); Thu, 16 Sep 2004 08:16:35 -0400 Received: from merkurneu.hrz.uni-giessen.de ([134.176.2.3]:53675 "EHLO merkurneu.hrz.uni-giessen.de") by vger.kernel.org with ESMTP id S268019AbUIPMP2 (ORCPT ); Thu, 16 Sep 2004 08:15:28 -0400 Date: Thu, 16 Sep 2004 22:15:22 +1000 (EST) From: Sergei Haller X-X-Sender: gc1007@fb07-calculator.math.uni-giessen.de To: Andi Kleen Cc: linux-kernel@vger.kernel.org Subject: Re: lost memory on a 4GB amd64 In-Reply-To: Message-Id: References: <2EWxl-7CI-13@gated-at.bofh.it> Organization: University of Giessen * Germany MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-HRZ-JLUG-MailScanner-Information: Passed JLUG virus check X-HRZ-JLUG-MailScanner: Found to be clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1494 Lines: 37 On Thu, 16 Sep 2004, Andi Kleen (AK) wrote: AK> Sergei Haller writes: AK> AK> > the problem is that about 512 MB of that memory is lost (AGP aperture and AK> > stuff). Although everything is perfect otherwise. AK> > As far as I understand, all the PCI/AGP hardware uses the top end of the AK> > 4GB address range to access their memory and there is just an AK> > "overlapping" of the addresses. thus only the remaining 3.5 GB are AK> > available. AK> AK> It's a BIOS issue. Nothing the kernel can do about it. You are AK> talking to the wrong people. Hi Andi, I am sure you did read the rest of my mail, didn't you? I mean the part where I describe that there is an option in the BIOS for that but the kernel crashes if I enable it. If it is still a problem of the BIOS, could you please be more specific about what exactly is the problem with the BIOS? Thanks, Sergei -- -------------------------------------------------------------------- -?) eMail: Sergei.Haller@math.uni-giessen.de /\\ -------------------------------------------------------------------- _\_V Be careful of reading health books, you might die of a misprint. -- Mark Twain - 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/