From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756630Ab0KVE4L (ORCPT ); Sun, 21 Nov 2010 23:56:11 -0500 Received: from tomasu.net ([64.85.170.234]:49209 "EHLO mail.tomasu.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754013Ab0KVE4K (ORCPT ); Sun, 21 Nov 2010 23:56:10 -0500 From: Thomas Fjellstrom Reply-To: thomas@fjellstrom.ca To: Jiri Slaby Subject: Re: missing 700 MB of RAM Date: Sun, 21 Nov 2010 21:55:59 -0700 User-Agent: KMail/1.13.5 (Linux/2.6.36; KDE/4.5.2; x86_64; svn-1188918; 2010-10-21) Cc: Andreas Hartmann , linux-kernel@vger.kernel.org References: <4CE9A5D0.4080701@gmail.com> In-Reply-To: <4CE9A5D0.4080701@gmail.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Message-Id: <201011212156.00189.thomas@fjellstrom.ca> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On November 21, 2010, Jiri Slaby wrote: > On 11/21/2010 08:02 PM, Andreas Hartmann wrote: > > I've got 8 GB RAM installed, but linux reports 7,3 GB. Where is the > > missing RAM (700 MB)? > > ... > > > The motherboard is a GA-MA78GM-S2H (64bit, AMD) with a on board Radeon > > HD 3200 VGA card. The card uses 256 MB of RAM - so 444 MB of RAM are > > missing. Where are they gone? > > Hi, ask your BIOS: > > BIOS-provided physical RAM map: > > BIOS-e820: 0000000000000000 - 000000000009f800 (usable) > > BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved) > > BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) > > BIOS-e820: 0000000000100000 - 00000000afde0000 (usable) > > BIOS-e820: 00000000afde0000 - 00000000afde3000 (ACPI NVS) > > BIOS-e820: 00000000afde3000 - 00000000afdf0000 (ACPI data) > > BIOS-e820: 00000000afdf0000 - 00000000afe00000 (reserved) > > BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) > > BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved) > > BIOS-e820: 0000000100000000 - 0000000230000000 (usable) > > It reports 7677M of usable mem. Or maybe your loader is cheating on you? > I doubt so... > > regards, I've got the same board, It doesn't seem my map is missing more than a few MB out of 2G (gfx reservation is 128MB) [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009f800 (usable) [ 0.000000] BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved) [ 0.000000] BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) [ 0.000000] BIOS-e820: 0000000000100000 - 0000000077de0000 (usable) [ 0.000000] BIOS-e820: 0000000077de0000 - 0000000077de3000 (ACPI NVS) [ 0.000000] BIOS-e820: 0000000077de3000 - 0000000077df0000 (ACPI data) [ 0.000000] BIOS-e820: 0000000077df0000 - 0000000077e00000 (reserved) [ 0.000000] BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) [ 0.000000] BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved) I'm using the F5 bios if it helps any. -- Thomas Fjellstrom thomas@fjellstrom.ca