From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265441AbTLSFE2 (ORCPT ); Fri, 19 Dec 2003 00:04:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265446AbTLSFE2 (ORCPT ); Fri, 19 Dec 2003 00:04:28 -0500 Received: from holly.csn.ul.ie ([136.201.105.4]:28642 "EHLO holly.csn.ul.ie") by vger.kernel.org with ESMTP id S265441AbTLSFE0 (ORCPT ); Fri, 19 Dec 2003 00:04:26 -0500 Date: Fri, 19 Dec 2003 05:04:25 +0000 (GMT) From: Dave Airlie X-X-Sender: airlied@skynet To: linux-kernel@vger.kernel.org Subject: 2.6.0 incorrect memory sizing (without a full BIOS).. Message-ID: 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 Hi all, I've got an internal development board based on the Intel 815 chipset and the Intel ACSFL mini-BIOS for embedded systems, and then using grub 0.93 to boot Linux. under 2.4 my memory is correctly sized at 256MB, but under 2.6 I'm only seeing 64MB, 2.6 gives: BIOS-provided physical RAM map: BIOS-88: 0000000000000000 - 000000000009f000 (usable) BIOS-88: 0000000000100000 - 00000000040ffc00 (usable) 64MB LOWMEM available 2.4 gives: BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 00000000000a0000 (usable) BIOS-e820: 00000000000e0000 - 0000000000100000 type 5 BIOS-e820: 0000000000100000 - 000000000ff00000 (usable) BIOS-e820: 000000000ff00000 - 0000000010000000 (reserved) BIOS-e820: 00000000fec00000 - 00000000fec00400 type 6 BIOS-e820: 00000000fee00000 - 00000000fee00400 type 7 BIOS-e820: 00000000fff00000 - 0000000100000000 type 5 So is this 2.6 just being more fussy about the contents of the e820 that my "BIOS" is supplying and falling back to the old style detection? Dave. -- David Airlie, Software Engineer http://www.skynet.ie/~airlied / airlied at skynet.ie pam_smb / Linux DECstation / Linux VAX / ILUG person