Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753989Ab2HTTW5 (ORCPT ); Mon, 20 Aug 2012 15:22:57 -0400 Received: from a194-183.smtp-out.amazonses.com ([199.255.194.183]:6772 "EHLO a194-183.smtp-out.amazonses.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753752Ab2HTTWz (ORCPT ); Mon, 20 Aug 2012 15:22:55 -0400 Date: Mon, 20 Aug 2012 19:22:53 +0000 From: Christoph Lameter X-X-Sender: cl@gentwo.org To: Matthew Garrett cc: Arjan van de Ven , Alex Shi , Peter Zijlstra , Suresh Siddha , vincent.guittot@linaro.org, svaidy@linux.vnet.ibm.com, Ingo Molnar , Andrew Morton , Linus Torvalds , "linux-kernel@vger.kernel.org" Subject: Re: [discussion]sched: a rough proposal to enable power saving in scheduler In-Reply-To: <20120820155203.GB29974@srcf.ucam.org> Message-ID: <00000139457cd7a4-6dc13b06-c387-4c5e-9297-121c9cde6c39-000000@email.amazonses.com> References: <5028F12C.7080405@intel.com> <20120815161911.GA14534@srcf.ucam.org> <502C7F24.6020900@intel.com> <502CFC41.1030501@linux.intel.com> <0000013944b80714-c594cc1e-de63-4901-9aa7-0b5a3d8629e5-000000@email.amazonses.com> <20120820155203.GB29974@srcf.ucam.org> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-SES-Outgoing: 199.255.194.183 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 767 Lines: 19 On Mon, 20 Aug 2012, Matthew Garrett wrote: > On Mon, Aug 20, 2012 at 03:47:54PM +0000, Christoph Lameter wrote: > > > So please make sure that there are obvious and easy ways to switch this > > stuff off or provide "low latency" know that keeps the system from > > assuming that idle time means that full performance is not needed. > > That seems like an issue for cpuidle, not the scheduler. Does pm_qos not > already do what you want? Dont know. A simple solution is not to compile power management into the kernel. -- 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/