From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764962AbYEAV1X (ORCPT ); Thu, 1 May 2008 17:27:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932388AbYEAV07 (ORCPT ); Thu, 1 May 2008 17:26:59 -0400 Received: from terminus.zytor.com ([198.137.202.10]:51600 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932334AbYEAV06 (ORCPT ); Thu, 1 May 2008 17:26:58 -0400 Message-ID: <481A356C.5090502@zytor.com> Date: Thu, 01 May 2008 14:26:04 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.12 (X11/20080226) MIME-Version: 1.0 To: Yinghai Lu CC: Andrew Morton , Ingo Molnar , Thomas Gleixner , Gabriel C , Mika Fischer , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] x86: mtrr cleanup for converting continuous to discrete - auto detect v2 References: <200804272337.40130.yhlu.kernel@gmail.com> <200804292025.58268.yhlu.kernel@gmail.com> <200805010100.34751.yhlu.kernel@gmail.com> <200805011157.00693.yhlu.kernel@gmail.com> <481A1D3A.5040202@zytor.com> <86802c440805011402h1e452b57ma27ffa6ad7b50238@mail.gmail.com> <481A31E2.2020800@zytor.com> <86802c440805011420g78a6abberaae6b765663ed33b@mail.gmail.com> In-Reply-To: <86802c440805011420g78a6abberaae6b765663ed33b@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Yinghai Lu wrote: >>> >> Yes, 16 GB systems are already mainstream; 32 GB is common, so I don't see >> any reason to stop at 2 GB. Instead, it should loop up to the physical >> address size. > > but our objective is that has 0xd0000000-0xe0000000 (WC) not to be > overlapping with other MTRR entries (UC).. > So, pray tell, how comes this algorithm can come up with a non-solution to the problem presented to it? Overall, I'm feeling there is something really completely wrong if this needs manual tunables of any sort. -hpa