Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267772AbUIPHBi (ORCPT ); Thu, 16 Sep 2004 03:01:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267708AbUIPHBi (ORCPT ); Thu, 16 Sep 2004 03:01:38 -0400 Received: from zero.aec.at ([193.170.194.10]:30214 "EHLO zero.aec.at") by vger.kernel.org with ESMTP id S267807AbUIPHBc (ORCPT ); Thu, 16 Sep 2004 03:01:32 -0400 To: Sergei Haller cc: linux-kernel@vger.kernel.org Subject: Re: lost memory on a 4GB amd64 References: <2EWxl-7CI-13@gated-at.bofh.it> From: Andi Kleen Date: Thu, 16 Sep 2004 09:01:28 +0200 In-Reply-To: <2EWxl-7CI-13@gated-at.bofh.it> (Sergei Haller's message of "Thu, 16 Sep 2004 07:00:11 +0200") Message-ID: User-Agent: Gnus/5.110003 (No Gnus v0.3) Emacs/21.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 759 Lines: 20 Sergei Haller writes: > the problem is that about 512 MB of that memory is lost (AGP aperture and > stuff). Although everything is perfect otherwise. > As far as I understand, all the PCI/AGP hardware uses the top end of the > 4GB address range to access their memory and there is just an > "overlapping" of the addresses. thus only the remaining 3.5 GB are > available. It's a BIOS issue. Nothing the kernel can do about it. You are talking to the wrong people. -Andi - 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/