From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932648AbbFEJEo (ORCPT ); Fri, 5 Jun 2015 05:04:44 -0400 Received: from mail-wi0-f177.google.com ([209.85.212.177]:34952 "EHLO mail-wi0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932382AbbFEJEj (ORCPT ); Fri, 5 Jun 2015 05:04:39 -0400 Date: Fri, 5 Jun 2015 11:04:33 +0200 From: Richard Cochran To: Peter Zijlstra Cc: John Stultz , Ingo Molnar , lkml , Prarit Bhargava , Daniel Bristot de Oliveira , Jan Kara , Jiri Bohac , Thomas Gleixner , Ingo Molnar , Shuah Khan Subject: Re: [RFC][PATCH 4/4] time: Do leapsecond adjustment in gettime fastpaths Message-ID: <20150605090433.GC1528@localhost.localdomain> References: <1432931068-4980-1-git-send-email-john.stultz@linaro.org> <1432931068-4980-5-git-send-email-john.stultz@linaro.org> <20150602090154.GA2590@gmail.com> <20150603090452.GA9490@gmail.com> <20150604064809.GA14685@gmail.com> <20150605072913.GD19282@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150605072913.GD19282@twins.programming.kicks-ass.net> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 05, 2015 at 09:29:13AM +0200, Peter Zijlstra wrote: > That leaves the question; for who is this exact second edge important? Distributed applications using the UTC time scale. Many control applications are done with a 1 millisecond period. Having the time wrong by a second for 10 or 100 loops is bad news. Thanks, Richard