Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752576AbXE3LP0 (ORCPT ); Wed, 30 May 2007 07:15:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751449AbXE3LPP (ORCPT ); Wed, 30 May 2007 07:15:15 -0400 Received: from lucidpixels.com ([75.144.35.66]:46066 "EHLO lucidpixels.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750897AbXE3LPO (ORCPT ); Wed, 30 May 2007 07:15:14 -0400 Date: Wed, 30 May 2007 07:15:12 -0400 (EDT) From: Justin Piszcz X-X-Sender: jpiszcz@p34.internal.lan To: Zoltan Boszormenyi cc: linux-kernel , support@mailbox.cps.intel.com Subject: Re: Kernel 2.6.21.3 does not work with 8GB of RAM on Intel 965WH In-Reply-To: <465D43C0.60609@dunaweb.hu> Message-ID: References: <465D43C0.60609@dunaweb.hu> MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="-1463747160-875916484-1180523712=:5844" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1872 Lines: 56 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---1463747160-875916484-1180523712=:5844 Content-Type: TEXT/PLAIN; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE On Wed, 30 May 2007, Zoltan Boszormenyi wrote: > Hi, > >> 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. > > 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? > > Best regards, > Zolt=E1n B=F6sz=F6rm=E9nyi > I see, so Intel 965 motherboards do not work with 8GB of memory? Or is=20 this a Linux issue? I have an Intel Case ID open 225446 but so far we have not gotten anywhere= =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= =20 can do? Continue to speak with Intel? Or perhaps someone with more=20 knowledge of the kernel and chime in as to what exactly is happening here? Justin. ---1463747160-875916484-1180523712=:5844-- - 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/