From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arjan van de Ven Subject: Re: [RFC]cpuidle: disable menu governor if nohz is disabled Date: Tue, 30 Aug 2011 19:35:55 -0700 Message-ID: <20110830193555.5f832351@infradead.org> References: <1314755767.29510.57.camel@sli10-conroe> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from casper.infradead.org ([85.118.1.10]:48904 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754856Ab1HaCct (ORCPT ); Tue, 30 Aug 2011 22:32:49 -0400 In-Reply-To: <1314755767.29510.57.camel@sli10-conroe> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Shaohua Li Cc: Len Brown , "Li, Aubrey" , linux acpi On Wed, 31 Aug 2011 09:56:07 +0800 Shaohua Li wrote: > Lenb, > Aubrey is asking me to fix the issue. So either we delete disable nohz > code or fix cpuidle. if you want to fix cpuidle, here it is. > > Thanks, > SHaohua > > Subject: cpuidle: disable menu governor if nohz is disabled > > Aubrey is asking why nohz disables C-state. nohz has no dependency > with idle, but menu governor does. If nohz is disabled, using menu > governor is pointless, because we never get correct sleep length, so > let's use ladder governor just like nohz isn't compiled in. > I would prefer to not allow nohz....... -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org