From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753831Ab1KWKZ3 (ORCPT ); Wed, 23 Nov 2011 05:25:29 -0500 Received: from mail-ww0-f44.google.com ([74.125.82.44]:48126 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752496Ab1KWKZ1 (ORCPT ); Wed, 23 Nov 2011 05:25:27 -0500 Date: Wed, 23 Nov 2011 11:26:43 +0100 From: Daniel Vetter To: Keith Packard Cc: Matthew Garrett , David Woodhouse , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: Re: [PATCH] drm/i915: By default, enable RC6 on IVB and SNB when reasonable Message-ID: <20111123102643.GB3864@phenom.ffwll.local> Mail-Followup-To: Keith Packard , Matthew Garrett , David Woodhouse , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org References: <1321684889-18691-1-git-send-email-keithp@keithp.com> <20111122201531.GD5547@srcf.ucam.org> <861uszfrah.fsf@sumi.keithp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <861uszfrah.fsf@sumi.keithp.com> X-Operating-System: Linux phenom 3.1.0+ User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 22, 2011 at 07:31:34PM -0800, Keith Packard wrote: > On Tue, 22 Nov 2011 20:15:31 +0000, Matthew Garrett wrote: > > > So the user has to choose between 5W of power saving or having dmar? And > > we default to giving them dmar? I think that's going to come as a > > surprise to people. > > You'd have to go into the BIOS to turn this on for most machines at > least? > > But, yeah, it seems like we should be turning DMAR off unless explicitly > requested; I can't understand how you'd ever need this running native on > the hardware. Not exactly an area I care about deeply; I've always > worked hard to make sure all virtualization garbage is disabled on every > machine I use. Problem is that we need to disable dmar on the entire box, afaics. And I assume that a bunch of people abusing desktop boards as servers will call "regression" on that. -Daniel -- Daniel Vetter Mail: daniel@ffwll.ch Mobile: +41 (0)79 365 57 48