Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751003AbWI1VTw (ORCPT ); Thu, 28 Sep 2006 17:19:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750958AbWI1VTw (ORCPT ); Thu, 28 Sep 2006 17:19:52 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:41698 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S1751009AbWI1VTv (ORCPT ); Thu, 28 Sep 2006 17:19:51 -0400 Date: Thu, 28 Sep 2006 23:11:50 +0200 From: Ingo Molnar To: Roman Zippel Cc: john stultz , lkml , Thomas Gleixner , Andrew Morton Subject: Re: [RFC] exponential update_wall_time Message-ID: <20060928211150.GA32393@elte.hu> References: <1159385734.29040.9.camel@localhost> <1159398793.7297.9.camel@localhost> <1159403333.7297.24.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: -2.8 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.8 required=5.9 tests=ALL_TRUSTED,AWL,BAYES_50 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts 0.5 BAYES_50 BODY: Bayesian spam probability is 40 to 60% [score: 0.5000] -0.0 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1192 Lines: 28 * Roman Zippel wrote: > > > add up to 1 second. Right now we slice it into HZ steps, but this > > > can be rather easily changed now. > > > > Right off, it seems it would then make sense to make the ntp "ticks" > > one second in length. And set the interval values accordingly. > > > > However, there might be clocksources that are incapable of running > > freely for a full second w/o overflowing. In that case we would need > > to set the interval values and the ntp tick length accordingly. It > > seems we need some sort of interface to ntp to define that base tick > > length. Would that be ok by you? > > I don't see how you want to do this without some rather complex > calculations. I doubt this will make anything easier. lets figure out a way to solve this in some manner - the loop of thousands of function calls on dynticks didnt look too well. Millions of kids will be grateful for it :-) Ingo - 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/