From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759828AbXGCP0h (ORCPT ); Tue, 3 Jul 2007 11:26:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755143AbXGCP03 (ORCPT ); Tue, 3 Jul 2007 11:26:29 -0400 Received: from poesci.dolphinics.no ([81.175.23.36]:60041 "EHLO poesci.dolphinics.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754988AbXGCP03 (ORCPT ); Tue, 3 Jul 2007 11:26:29 -0400 To: Florian Attenberger Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.21.5 june 30th to july 1st date hang? References: <20070703135949.GB19565@master.home> <87hcol7en2.fsf@pelargir.dolphinics.no> <20070703150210.GA31495@master.home> From: Arne Georg Gleditsch Date: Tue, 03 Jul 2007 17:26:27 +0200 In-Reply-To: <20070703150210.GA31495@master.home> (Florian Attenberger's message of "Tue\, 3 Jul 2007 17\:02\:10 +0200") Message-ID: <87d4z97bks.fsf@pelargir.dolphinics.no> User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/23.0.0 (gnu/linux) 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 Florian Attenberger writes: > yep, controlled by ntpd. > You're right according to > ftp://hpiers.obspm.fr/iers/bul/bulc/bulletinc.33 > that event shouldn't have been there. I'm not all that versed in ntp-ish, but it appears that the leap second insertion should be propagated through the ntp protocol. Whether the leap second in question came from a ntp server giving out wrong data or from a misinterpretation or bug in ntpd is of course hard to say, but either way turning the clock back is unlikely to reconstruct the circumstances. An interesting exercise might be to code up a small program to call adjtimex with timex.status |= STA_INS, to see if this can trigger the problem. (The bogus leap second might be a red herring entirely, of course...) -- Arne.