Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750793AbWCGMRb (ORCPT ); Tue, 7 Mar 2006 07:17:31 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752114AbWCGMRb (ORCPT ); Tue, 7 Mar 2006 07:17:31 -0500 Received: from smtp.osdl.org ([65.172.181.4]:34507 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S1750793AbWCGMRa convert rfc822-to-8bit (ORCPT ); Tue, 7 Mar 2006 07:17:30 -0500 Date: Tue, 7 Mar 2006 04:15:32 -0800 From: Andrew Morton To: Martin =?ISO-8859-1?B?TU9LUkVKX18=?= Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.16-rc5 huge memory detection regression Message-Id: <20060307041532.3ef45392.akpm@osdl.org> In-Reply-To: <440D6581.9080000@ribosome.natur.cuni.cz> References: <440D6581.9080000@ribosome.natur.cuni.cz> X-Mailer: Sylpheed version 1.0.4 (GTK+ 1.2.10; i386-redhat-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 Content-Length: 1935 Lines: 42 Martin MOKREJ__ wrote: > > I just tested 2.6.16-rc5 kernel on MSI 9136 dual Xeon server > motherboard with 16 GB of memory and the kernel detects only 8 GB of > RAM instead. 2.6.15 kernel detected properly 16 GB. I haven't tested > any kernel revisions in between these two, but could if you point me > in a specific direction. Attaching diff(1) output of dmesg(1) outputs. > Please Cc: me in replies. Thanks! > Martin > > > [boot-2.6.15_to_16-rc5.diff text/plain (12156 bytes)] The diff is useful. > --- tmp/boot-2.6.15.txt 2006-03-07 11:45:48.015509048 +0100 > +++ tmp/boot-2.6.16-rc5.txt 2006-03-07 11:45:48.029506920 +0100 > @@ -1,4 +1,4 @@ > -Linux version 2.6.15 (root@phylo) (gcc version 3.4.5 (Gentoo 3.4.5-r1, ssp-3.4.5-1.0, pie-8.7.9)) #1 SMP Mon Mar 6 20:20:06 MET 2006 > +Linux version 2.6.16-rc5 (root@phylo) (gcc version 3.4.5 (Gentoo 3.4.5-r1, ssp-3.4.5-1.0, pie-8.7.9)) #1 SMP Mon Mar 6 19:58:24 MET 2006 > BIOS-provided physical RAM map: > BIOS-e820: 0000000000000000 - 000000000009a800 (usable) > BIOS-e820: 000000000009a800 - 00000000000a0000 (reserved) > @@ -12,16 +12,16 @@ > BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) > BIOS-e820: 00000000ff800000 - 00000000ffc00000 (reserved) > BIOS-e820: 00000000fffffc00 - 0000000100000000 (reserved) > - BIOS-e820: 0000000100000000 - 0000000430000000 (usable) > -16256MB HIGHMEM available. > + BIOS-e820: 0000000100000000 - 0000000230000000 (usable) > +8064MB HIGHMEM available. These numbers are what the BIOS is telling the kernel about your machine. Was the BIOS changed? If not, you might need to wiggle those DIMMs or something. - 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/