From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261545AbTDOO3d (for ); Tue, 15 Apr 2003 10:29:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261584AbTDOO3d (for ); Tue, 15 Apr 2003 10:29:33 -0400 Received: from [195.228.112.1] ([195.228.112.1]:1063 "HELO goliat.otphazibank.hu") by vger.kernel.org with SMTP id S261545AbTDOO3a (for ); Tue, 15 Apr 2003 10:29:30 -0400 Message-ID: <3E9C19A2.1040206@dell633.otpefo.com> Date: Tue, 15 Apr 2003 16:39:30 +0200 From: Nagy Tibor User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3) Gecko/20030312 X-Accept-Language: en-us, en, hu MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: HIGHMEM Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, We have two Dell Poweredge servers, an older one (PowerEdge 6300) and a newer one (PowerEdge 6400). Both servers have 4GB RAM, but the Linux kernel uses about 500MB less memory in the newer machine. See /var/log/boot.msg on the old one: <4>Linux version 2.4.20 (root@dell632) (gcc version 2.95.3 20010315 (SuSE)) #4 SMP Fri Jan 10 12:07:00 CET 2003 <6>BIOS-provided physical RAM map: <4> BIOS-e820: 0000000000000000 - 00000000000a0000 (usable) <4> BIOS-e820: 0000000000100000 - 00000000fbffe000 (usable) <4> BIOS-e820: 00000000fbffe000 - 00000000fc000000 (reserved) <4> BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved) <4> BIOS-e820: 00000000fee00000 - 00000000fee10000 (reserved) <4> BIOS-e820: 00000000fff80000 - 0000000100000000 (reserved) <5>3135MB HIGHMEM available. <5>896MB LOWMEM available. and on the new one: <4>Linux version 2.4.20 (root@alfa) (gcc version 2.95.3 20010315 (SuSE)) #10 SMP Fri Mar 28 15:40:45 CET 2003 <6>BIOS-provided physical RAM map: <4> BIOS-e820: 0000000000000000 - 00000000000a0000 (usable) <4> BIOS-e820: 0000000000100000 - 00000000dfff0000 (usable) <4> BIOS-e820: 00000000dfff0000 - 00000000dfffec00 (ACPI data) <4> BIOS-e820: 00000000dfffec00 - 00000000dffff000 (reserved) <4> BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved) <4> BIOS-e820: 00000000fee00000 - 00000000fee10000 (reserved) <4> BIOS-e820: 00000000fff80000 - 0000000100000000 (reserved) <5>2687MB HIGHMEM available. <5>896MB LOWMEM available. There is a big hole between 00000000dffff000 and 00000000fec00000, which is not used on the new machine. What can I do? Thanks for your help. Tibor ------------------------------------------------------------------------ Tibor Nagy E-mail: nagyt@otpbank.hu ------------------------------------------------------------------------