From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760567AbYECI3V (ORCPT ); Sat, 3 May 2008 04:29:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753940AbYECI3G (ORCPT ); Sat, 3 May 2008 04:29:06 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:36810 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751384AbYECI3E (ORCPT ); Sat, 3 May 2008 04:29:04 -0400 Date: Sat, 3 May 2008 10:28:50 +0200 From: Ingo Molnar To: Peter Zijlstra Cc: David Miller , efault@gmx.de, elendil@planet.nl, parag.warudkar@gmail.com, linux-kernel@vger.kernel.org, guichaz@yahoo.fr, andi@firstfloor.org Subject: Re: 'global' rq->clock Message-ID: <20080503082849.GA29605@elte.hu> References: <200805022053.24779.elendil@planet.nl> <1209756423.4693.8.camel@marge.simson.net> <1209758186.6929.18.camel@lappy> <20080502.144827.158329188.davem@davemloft.net> <1209766054.6929.29.camel@lappy> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1209766054.6929.29.camel@lappy> 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 * Peter Zijlstra wrote: > Yeah, I was thinking of a way for architectures to signify how much > help they need building the various clocks. Sparc, power and s390 > would not need any help. there's already such a mechanism in sched-devel.git (and has been there for a week or two): an architecture can set time_sync_thresh to -1LL during early bootup and essentially disable all the synchronization logic. Ingo