From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932208Ab2C1OvW (ORCPT ); Wed, 28 Mar 2012 10:51:22 -0400 Received: from nat28.tlf.novell.com ([130.57.49.28]:12256 "EHLO nat28.tlf.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752519Ab2C1OvV convert rfc822-to-8bit (ORCPT ); Wed, 28 Mar 2012 10:51:21 -0400 Message-Id: <4F7341BA020000780007B825@nat28.tlf.novell.com> X-Mailer: Novell GroupWise Internet Agent 12.0.0 Date: Wed, 28 Mar 2012 15:52:10 +0100 From: "Jan Beulich" To: "Konrad Rzeszutek Wilk" Cc: "Konrad Rzeszutek Wilk" , "keir.xen@gmail.com" , "Jinsong Liu" , "xen-devel@lists.xensource.com" , "Kernel development list" Subject: Re: [Xen-devel] [PATCH 1/3] PAD helper for native and paravirt platform References: <20120324003111.GA11777@andromeda.dapyr.net> <20120326163558.GC10236@phenom.dumpdata.com> <4F732365020000780007B6A1@nat28.tlf.novell.com> <20120328142742.GD18161@phenom.dumpdata.com> In-Reply-To: <20120328142742.GD18161@phenom.dumpdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >>> On 28.03.12 at 16:27, Konrad Rzeszutek Wilk wrote: > On Wed, Mar 28, 2012 at 01:42:45PM +0100, Jan Beulich wrote: >> >>> On 28.03.12 at 12:48, "Liu, Jinsong" wrote: >> > But just curious, what's the purpose and benefit of exposing mwait to dom0? > > > So that cstate.c can evaluate properly the deeper C-states and > xen-acpi-processor > can upload them to the hypervisor. > >> > I remember xen against doing so before. >> >> And I don't recall anything having changed in that regard. > > Jan, you Acked the patch in question: https://lkml.org/lkml/2012/2/24/129 But that isn't a Xen patch. Xen isn't (and shouldn't be) exposing mwait. Jan