From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 19 Oct 2002 16:06:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 19 Oct 2002 16:06:48 -0400 Received: from kraid.nerim.net ([62.4.16.95]:43272 "EHLO kraid.nerim.net") by vger.kernel.org with ESMTP id ; Sat, 19 Oct 2002 16:06:48 -0400 Date: Sat, 19 Oct 2002 22:16:44 +0200 From: Jean Delvare To: linux-kernel@vger.kernel.org Subject: memory and /dev/mem Message-Id: <20021019221644.58a51ede.khali@linux-fr.org> Organization: http://www.linux-fr.org/ X-Mailer: Sylpheed version 0.8.5 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi everyone, I have a question about /dev/mem. It looks like /dev/mem is actually shorter that the actual physical memory available on the system, by about 600 kilobytes (seems to depend on the total size). Is there a reason for that? It happens that on some systems, the DMI table is located near the end of the memory, so we are not able to access it. Is this memory area special? Thanks. -- Jean Delvare http://www.ensicaen.ismra.fr/~delvare/