Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753938AbXE3OYf (ORCPT ); Wed, 30 May 2007 10:24:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751994AbXE3OY2 (ORCPT ); Wed, 30 May 2007 10:24:28 -0400 Received: from lucidpixels.com ([75.144.35.66]:45907 "EHLO lucidpixels.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751984AbXE3OY1 (ORCPT ); Wed, 30 May 2007 10:24:27 -0400 Date: Wed, 30 May 2007 10:24:26 -0400 (EDT) From: Justin Piszcz X-X-Sender: jpiszcz@p34.internal.lan To: Zoltan Boszormenyi cc: linux-kernel , crmotherboard@mailbox.cps.intel.com Subject: Case: 225446: Linux 2.6.21.3 does not work with 8GB of RAM on Intel 965WH In-Reply-To: Message-ID: References: <465D43C0.60609@dunaweb.hu> MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="-1463747160-1554075124-1180535066=:13945" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2013 Lines: 64 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---1463747160-1554075124-1180535066=:13945 Content-Type: TEXT/PLAIN; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE On Wed, 30 May 2007, Justin Piszcz wrote: > > > On Wed, 30 May 2007, Zoltan Boszormenyi wrote: > >> Hi, >>=20 >>> Look at how slow the raid benchmarks are in dmesg with 8GB of memory! >>>=20 >>> [ 59.592560] raid6: using algorithm sse2x4 (476 MB/s) >>> [ 59.597558] raid5: using function: generic_sse (56.000 MB/sec) >>>=20 >>> Yikes! >>>=20 >>> With mem=3D4096M: >>> [ 60.336352] raid6: using algorithm sse2x4 (6804 MB/s) >>> [ 60.341345] raid5: using function: generic_sse (8552.000 MB/sec) >>>=20 >>> What is going on here? >>>=20 >>> Justin. >>=20 >> I saw a similar effect on a P5 board that could >> only cache 64MB of memory a long time ago. >> Putting more memory into it made the machine slower >> and e.g. made the sym2 driver giving up at initialization. >> Maybe it's a modern reincarnation of the problem? >>=20 >> Best regards, >> Zolt=E1n B=F6sz=F6rm=E9nyi >>=20 > > I see, so Intel 965 motherboards do not work with 8GB of memory? Or is t= his=20 > a Linux issue? > > I have an Intel Case ID open 225446 but so far we have not gotten anywher= e=20 > with this problem. Currently I have 8GB in the machine and boot with=20 > mem=3D4096M. Was there any type of fix? Any recommendations as to what = I can=20 > do? Continue to speak with Intel? Or perhaps someone with more knowledg= e of=20 > the kernel and chime in as to what exactly is happening here? > > Justin. Adding Intel to CC list. ---1463747160-1554075124-1180535066=:13945-- - 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/