From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762740AbYD2UkR (ORCPT ); Tue, 29 Apr 2008 16:40:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762109AbYD2Uj5 (ORCPT ); Tue, 29 Apr 2008 16:39:57 -0400 Received: from out01.mta.xmission.com ([166.70.13.231]:46351 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761673AbYD2Ujz (ORCPT ); Tue, 29 Apr 2008 16:39:55 -0400 From: ebiederm@xmission.com (Eric W. Biederman) To: "Yinghai Lu" Cc: "Andrew Morton" , "Ingo Molnar" , "H. Peter Anvin" , "Thomas Gleixner" , "Gabriel C" , "linux-kernel@vger.kernel.org" , "Mika Fischer" References: <200804272337.40130.yhlu.kernel@gmail.com> <200804281244.56938.yhlu.kernel@gmail.com> <200804281316.14168.yhlu.kernel@gmail.com> <200804281505.05764.yhlu.kernel@gmail.com> <86802c440804291304r7ff169f6k9132f98761ecef42@mail.gmail.com> Date: Tue, 29 Apr 2008 13:29:35 -0700 In-Reply-To: <86802c440804291304r7ff169f6k9132f98761ecef42@mail.gmail.com> (Yinghai Lu's message of "Tue, 29 Apr 2008 13:04:36 -0700") Message-ID: User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-SA-Exim-Connect-IP: 24.130.11.59 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-DCC: XMission; sa04 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Report: * -1.8 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.0 T_TM2_M_HEADER_IN_MSG BODY: T_TM2_M_HEADER_IN_MSG * -2.6 BAYES_00 BODY: Bayesian spam probability is 0 to 1% * [score: 0.0000] * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa04 1397; Body=1 Fuz1=1 Fuz2=1] * 0.0 XM_SPF_Neutral SPF-Neutral Subject: Re: [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v5 X-SA-Exim-Version: 4.2 (built Thu, 03 Mar 2005 10:44:12 +0100) X-SA-Exim-Scanned: Yes (on mgr1.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "Yinghai Lu" writes: > (less memory + fast X) or (more 8M RAM + slow...) Yes. That is the basic question. Not all X drivers need it and potentially the current kernel drm modules can use the PAT infrastructure that has been merged. Further a SMM monitor running 100 times or more slower may cause problems if SMM mode is entered frequently, slowing down the entire system not just X. So if you don't have X or you have a crazy SMM monitor this can be an issue. Eric