Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762179AbXKER1z (ORCPT ); Mon, 5 Nov 2007 12:27:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761561AbXKERXm (ORCPT ); Mon, 5 Nov 2007 12:23:42 -0500 Received: from terminus.zytor.com ([198.137.202.10]:43313 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761554AbXKERXl (ORCPT ); Mon, 5 Nov 2007 12:23:41 -0500 Message-ID: <472F5195.2050403@zytor.com> Date: Mon, 05 Nov 2007 09:23:33 -0800 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.5 (X11/20070727) MIME-Version: 1.0 To: =?ISO-8859-1?Q?Bo_Brant=E9n?= CC: linux-kernel@vger.kernel.org Subject: Re: x86_64 ten times slower than i386 References: <20071103162640.GS17536@waste.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1005 Lines: 22 Bo Brant?n wrote: > > After I uppgraded the BIOS the mtrr looks like below, and now it works > if I boot with mem=4736M so I can use all memory but it still doesn't > work without the mem parameter then it will run as slow as before. > > reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1 > reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1 > reg02: base=0xc0000000 (3072MB), size= 256MB: write-back, count=1 > reg03: base=0xcf800000 (3320MB), size= 8MB: uncachable, count=1 > reg04: base=0xcf700000 (3319MB), size= 1MB: uncachable, count=1 > reg05: base=0x100000000 (4096MB), size= 512MB: write-back, count=1 > reg06: base=0x120000000 (4608MB), size= 128MB: write-back, count=1 What does your e820 map look like? -hpa - 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/