From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932230AbVHXVIt (ORCPT ); Wed, 24 Aug 2005 17:08:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932229AbVHXVIt (ORCPT ); Wed, 24 Aug 2005 17:08:49 -0400 Received: from anf141.internetdsl.tpnet.pl ([83.17.87.141]:58509 "EHLO ogre.sisk.pl") by vger.kernel.org with ESMTP id S932230AbVHXVIr (ORCPT ); Wed, 24 Aug 2005 17:08:47 -0400 From: "Rafael J. Wysocki" To: LKML Subject: Memory problem w/ recent kernels on 2x Opteron with 12 GB RAM Date: Wed, 24 Aug 2005 23:08:54 +0200 User-Agent: KMail/1.8.2 Cc: discuss@x86-64.org, Andi Kleen MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200508242308.55433.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, I'm currently seeing a memory problem on a NUMA-enabled dual-Opteron 250 box with the 2.6.12.5 and 2.6.13-rc* (up to 7) kernels. Namely, the box has 12 GB of RAM, 8 GB of which is installed on the first node. The whole memory is detected but then only the first 8 GB of it is made available (minus some hardware-related holes), as though the memory on the second node were discarded for some reason. I have observed that the latest Fedora Core 3 kernel (based on 2.6.12) is also affected by this issue, but the "out-of-the-box" FC3 kernel, based on 2.6.9, is not. The motherboard is a Tyan S2882-D with the out-of-the-box BIOS, which is not the latest one. Should I upgrade it? Rafael -- - Would you tell me, please, which way I ought to go from here? - That depends a good deal on where you want to get to. -- Lewis Carroll "Alice's Adventures in Wonderland"