Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932132AbVLFKf1 (ORCPT ); Tue, 6 Dec 2005 05:35:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932548AbVLFKf0 (ORCPT ); Tue, 6 Dec 2005 05:35:26 -0500 Received: from scrub.xs4all.nl ([194.109.195.176]:1431 "EHLO scrub.xs4all.nl") by vger.kernel.org with ESMTP id S932132AbVLFKf0 (ORCPT ); Tue, 6 Dec 2005 05:35:26 -0500 Date: Tue, 6 Dec 2005 11:35:04 +0100 (CET) From: Roman Zippel X-X-Sender: roman@scrub.home To: Ingo Molnar cc: Ulrich Windl , john stultz , lkml , Darren Hart , Nishanth Aravamudan , Frank Sorenson , Thomas Gleixner Subject: Re: [PATCH 2/13] Time: Reduced NTP Rework (part 2) In-Reply-To: <20051206072708.GA25129@elte.hu> Message-ID: References: <4390E48E.4020005@mvista.com> <4395475C.21877.29399CFE@Ulrich.Windl.rkdvmks1.ngate.uni-regensburg.de> <20051206072708.GA25129@elte.hu> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1235 Lines: 31 Hi, On Tue, 6 Dec 2005, Ingo Molnar wrote: > > > I'm thinking about moving the leap second handling to a timer, with the > > > new timer system it would be easy to set a timer for e.g. 23:59.59 and > > > then set the time. This way it would be gone from the common path and it > > > wouldn't matter that much anymore whether it's used or not. > > > > Will the timer solution guarantee consistent and exact updates? > > it would still be dependent on system-load situations. Interrupt-load, actually. > It's an > interesting idea to use a timer for that, but there is no strict > synchronization between "get time of day" and "timer execution", so any > timer-based leap-second handling would be fundamentally asynchronous. I > dont think we want that, leap second handling should be a synchronous > property of 'time'. I'm not really sure what you're talking about. Could you please elaborate on "fundamentally asynchronous" and "synchronous property of 'time'"? bye, Roman - 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/