From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753923AbYANI0I (ORCPT ); Mon, 14 Jan 2008 03:26:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751381AbYANIZz (ORCPT ); Mon, 14 Jan 2008 03:25:55 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:47320 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750830AbYANIZz (ORCPT ); Mon, 14 Jan 2008 03:25:55 -0500 Date: Mon, 14 Jan 2008 09:25:43 +0100 From: Ingo Molnar To: "Carlos R. Mafra" Cc: linux-kernel@vger.kernel.org, Peter Zijlstra Subject: Re: [PATCH] Remove timer frequency choice if tickless is enabled Message-ID: <20080114082543.GC18296@elte.hu> References: <20080112020026.GB5849@Pilar.physics.ucla.edu> <20080112032718.GA3946@Pilar.socal.rr.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080112032718.GA3946@Pilar.socal.rr.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org (lkml Cc:-ed) * Carlos R. Mafra wrote: > choice > prompt "Timer frequency" > + depends on !NO_HZ > default HZ_250 > help > Allows the configuration of the timer frequency. It is customary we are not there yet to be able to do this. With NO_HZ the tick is only disabled when we go idle - but it still runs (and we rely on it, for example in the scheduler code) while we are non-idle. Peter Zijlstra is working on the 'high-res scheduler tick' feature to remove the scheduler dependencies. Ingo