Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752836Ab3EJNBu (ORCPT ); Fri, 10 May 2013 09:01:50 -0400 Received: from hydra.sisk.pl ([212.160.235.94]:42821 "EHLO hydra.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752693Ab3EJNBq convert rfc822-to-8bit (ORCPT ); Fri, 10 May 2013 09:01:46 -0400 From: "Rafael J. Wysocki" To: Toralf =?ISO-8859-1?Q?F=F6rster?= Cc: Dirk Brandewie , linux-acpi@vger.kernel.org, Linux Kernel , Linux PM list , boinc_dev@ssl.berkeley.edu Subject: Re: 3.9.0 + CONFIG_X86_INTEL_PSTATE=y -> ThinkPad T420 with i5 lost ACPI functionality Date: Fri, 10 May 2013 15:10:12 +0200 Message-ID: <4720627.g9zHkFYIDJ@vostro.rjw.lan> User-Agent: KMail/4.9.5 (Linux/3.9.0+; KDE/4.9.5; x86_64; ; ) In-Reply-To: <5184BF82.4070700@gmx.de> References: <5183EC09.9080208@gmx.de> <51842F6F.1050005@intel.com> <5184BF82.4070700@gmx.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1749 Lines: 49 On Saturday, May 04, 2013 09:57:54 AM Toralf Förster wrote: > On 05/03/2013 11:43 PM, Dirk Brandewie wrote: > > On 05/03/2013 02:26 PM, Toralf Förster wrote: > >> On 05/03/2013 11:10 PM, Dirk Brandewie wrote: > >>> > >>> ignore_nice_load is a feature of the ondemand governor. > >>> The intel_pstate driver is seeing the load presented by the BOINC client > >>> and is adjusting the pstate accordingly. > >> > >> Is the intel_pstate driver a choice for a notebook and friends where a > >> grid software is running as a low-prio back ground job ? > >> > > > > Probably not. > > Hhm. > > The kernel menuconfig says : > > This driver provides a P state for Intel core processors > The driver implements an internal governor and will become > the scaling driver and governor for Sandy bridge processors. > > > What shall a company like IBM with a lot of notebook installation running BOINC > in the back ground process (World Community Grid) do - what's the consequence for > those installations if they will have that a processor ? > > In the past (few years ago and related to the ondemand governor IIRC) there were > already a longer discussion about the "nice -n 19" topic and the result was > to support it. > > /me Cc:'ing boinc devs, the topic might be interesting for them too. One option might be to use the powerclamp driver along with intel_pstate to reduce the heat dissipation. Thanks, Rafael -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/