From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751970AbWCOWtS (ORCPT ); Wed, 15 Mar 2006 17:49:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752128AbWCOWtS (ORCPT ); Wed, 15 Mar 2006 17:49:18 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:11232 "EHLO mx3.mail.elte.hu") by vger.kernel.org with ESMTP id S1751970AbWCOWtR (ORCPT ); Wed, 15 Mar 2006 17:49:17 -0500 Date: Wed, 15 Mar 2006 23:46:59 +0100 From: Ingo Molnar To: "Bill Rugolsky Jr." , Jeff Garzik , Lee Revell , Andi Kleen , Jason Baron , linux-kernel@vger.kernel.org, john stultz Subject: Re: libata/sata_nv latency on NVIDIA CK804 [was Re: AMD64 X2 lost ticks on PM timer] Message-ID: <20060315224659.GD24074@elte.hu> References: <200602280022.40769.darkray@ic3man.com> <4408BEB5.7000407@garzik.org> <20060303234330.GA14401@ti64.telemetry-investments.com> <200603040107.27639.ak@suse.de> <20060315213638.GA17817@ti64.telemetry-investments.com> <1142459152.1671.64.camel@mindpipe> <20060315215848.GB18241@elte.hu> <441893AB.1070300@garzik.org> <20060315222441.GA24074@elte.hu> <20060315223656.GC17817@ti64.telemetry-investments.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060315223656.GC17817@ti64.telemetry-investments.com> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: 0.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=0.0 required=5.9 tests=AWL autolearn=no SpamAssassin version=3.0.3 0.0 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Bill Rugolsky Jr. wrote: > On Wed, Mar 15, 2006 at 11:24:41PM +0100, Ingo Molnar wrote: > > well, it's a PIO inb() op i think, and could thus in theory trigger SMM > > BIOS code. > > Is there any easy way to disable more SMM stuff than "noacpi"? not that i know of. Point of SMM is to make it hard to disable by OSs. They are a kind of hypervisor mode for the purposes of seemless hardware soft-extensions, from the days when it wasnt yet fashionable to call them virtualization ;) > If push comes to shove, I'll go all the way and just install LinuxBIOS > on the damn thing. Though I'm sure that will be a chore. i think it might be easier to try the new sata_nv.c driver first. Ingo