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From: David Newall <davidn@davidnewall.com>
To: Ben Goodger <goodgerster@gmail.com>
Cc: Robert Hancock <hancockr@shaw.ca>,
	linux-kernel@vger.kernel.org, linasvepstas@gmail.com,
	"Jeffrey J. Kosowsky" <jeff@kosowsky.org>,
	MentalMooMan <slashdot@jameshallam.info>,
	Travis Crump <pretzalz@techhouse.org>,
	burdell@iruntheinter.net
Subject: Re: Bug: Status/Summary of slashdot leap-second crash on new years 2008-2009
Date: Sun, 04 Jan 2009 19:13:21 +1030	[thread overview]
Message-ID: <496076A9.7030907@davidnewall.com> (raw)
In-Reply-To: <8752a8760901022237r75d408b3i74c703c8ac2d4597@mail.gmail.com>

Ben Goodger wrote:
> 2009/1/3 David Newall <davidn@davidnewall.com>:
>   
>> Shouldn't this be a simple zoneinfo change, whereby the last two seconds
>> of the year (in each timezone) both map to 31dec2008 23:59:59?  That's
>> the way the change has worked in the real world.  Why would ntp or the
>> kernel be involved?
>>     
>
> Actually, the change has worked in the real world with the
> introduction of a new second named 23:59:60

Fine.  However you want to describe that last second is immaterial.  The
point is that diddling the clock is not a true solution.  Take seconds
since epoch for January 1 and subtract the seconds since epoch since the
previous day and if the result isn't 86401 it's wrong.  Is Linux wrong? 
(I gather it is.)

  reply	other threads:[~2009-01-04  8:43 UTC|newest]

Thread overview: 109+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-01-02 19:25 Bug: Status/Summary of slashdot leap-second crash on new years 2008-2009 Linas Vepstas
2009-01-02 20:04 ` Diego Calleja
2009-01-02 20:25   ` Robert Hancock
2009-01-03  6:32     ` David Newall
2009-01-03  6:37       ` Ben Goodger
2009-01-04  8:43         ` David Newall [this message]
2009-01-04  9:00           ` Kyle Moffett
2009-01-04 10:03             ` David Newall
2009-01-04 11:13               ` david
2009-01-04 23:15                 ` David Newall
2009-01-04 23:25                   ` Chris Adams
2009-01-05  0:01                     ` David Newall
2009-01-05  0:41                       ` Alan Cox
2009-01-05  8:43                         ` David Newall
2009-01-05 19:47                           ` Alan Cox
2009-01-05  0:29                   ` david
2009-01-04 23:37                     ` David Newall
2009-01-05  1:05                       ` david
2009-01-05  0:14                         ` David Newall
2009-01-05  0:21                           ` Ben Goodger
2009-01-05  6:34                             ` David Newall
2009-01-05 23:03                               ` Linas Vepstas
2009-01-05  0:44                         ` Alan Cox
2009-01-05  5:48                       ` Linas Vepstas
2009-01-05 14:33                         ` Nick Andrew
2009-01-05 16:08                           ` Linas Vepstas
2009-01-05 17:51                             ` david
2009-01-05 17:42                               ` Linas Vepstas
2009-01-06  2:27                                 ` john stultz-lkml
2009-01-06  4:53                                   ` Linas Vepstas
2009-01-06  5:00                                     ` Linas Vepstas
2009-01-06 19:40                                     ` [ntpwg] " M. Warner Losh
2009-01-06 19:50                                 ` M. Warner Losh
2009-01-07  3:50                                 ` Danny Mayer
2009-01-07  4:52                                   ` Linas Vepstas
2009-01-07 10:03                                     ` David Newall
2009-01-07 17:24                                       ` M. Warner Losh
2009-01-08 16:51                                         ` Magnus Danielson
2009-01-07 14:34                                     ` Danny Mayer
2009-01-07 15:42                                       ` Linas Vepstas
2009-01-07 19:23                                         ` Danny Mayer
2009-01-07 16:04                                       ` john stultz
2009-01-07 17:36                                     ` M. Warner Losh
2009-01-07 17:39                                   ` M. Warner Losh
2009-01-07 19:31                                     ` Alan Cox
2009-01-07 19:42                                       ` M. Warner Losh
2009-01-08  3:57                                       ` Danny Mayer
2009-01-08  4:42                                         ` M. Warner Losh
2009-01-08 10:48                                           ` Alan Cox
2009-01-08 10:56                                             ` Alan Cox
2009-01-08 22:22                                               ` David Mills
2009-01-08 15:02                                             ` M. Warner Losh
2009-01-08 18:57                                               ` Marshall Eubanks
2009-01-08 20:09                                     ` Steve Allen
2009-01-12 16:11                                 ` Pavel Machek
2009-01-12 17:07                                   ` [ntpwg] " M. Warner Losh
2009-01-12 21:45                                     ` Valdis.Kletnieks
2009-01-06  2:31                             ` Nick Andrew
2009-01-06  1:59                           ` David Newall
2009-01-06  2:18                             ` Chris Adams
2009-01-06  2:51                             ` Nick Andrew
2009-01-06  9:40                               ` Alan Cox
2009-01-07  1:17                                 ` Nick Andrew
2009-01-07  9:37                                   ` Alan Cox
2009-01-07  9:46                                 ` David Newall
2009-01-07  9:54                                   ` Alan Cox
2009-01-07 10:18                                     ` David Newall
2009-01-07 10:52                                       ` Alan Cox
2009-01-07 13:45                                         ` David Newall
2009-01-07 14:10                                           ` Alan Cox
2009-01-07 14:36                                             ` David Newall
2009-01-07 15:40                                               ` Alan Cox
2009-01-10  9:46                                                 ` David Newall
2009-01-07 22:13                                               ` Chris Adams
2009-01-07 13:33                                       ` Chris Adams
2009-01-07 13:37                                         ` Alan Cox
2009-01-07 14:12                                           ` David Newall
2009-01-07 14:09                                         ` David Newall
2009-01-07 21:42                                           ` Chris Adams
2009-01-04 11:35               ` Valdis.Kletnieks
2009-01-05  0:08                 ` David Newall
2009-01-06  3:53                   ` Valdis.Kletnieks
2009-01-04 17:20               ` Kyle Moffett
2009-01-03  7:00       ` Chris Adams
2009-01-04  8:41         ` David Newall
2009-01-02 20:29   ` Linas Vepstas
     [not found] ` <8752a8760901021328t545a0327v58faebe1e921680a@mail.gmail.com>
2009-01-02 21:29   ` Ben Goodger
2009-01-03  0:21 ` Chris Adams
2009-01-03  2:23   ` Duane Griffin
2009-01-03  3:45     ` Linas Vepstas
2009-01-03  4:41     ` [PATCH] " Chris Adams
2009-01-03  4:52       ` Duane Griffin
2009-01-03 18:01         ` [PATCH] v2 " Chris Adams
2009-01-03 19:04           ` Duane Griffin
2009-01-03 20:01           ` Linas Vepstas
2009-06-08  2:18           ` Ben Hutchings
2009-06-18 22:34             ` Chris Friesen
2009-06-18 22:58               ` Ben Hutchings
2009-06-18 23:48                 ` Chris Friesen
2009-01-06  2:21   ` john stultz-lkml
2009-01-06  2:25     ` Chris Adams
2009-01-06  4:35     ` Linas Vepstas
2009-01-03  3:49 ` Linas Vepstas
2009-01-03  4:02   ` Ben Goodger
2009-01-03  4:46     ` Duane Griffin
2009-01-03  4:50       ` Ben Goodger
2009-01-03 22:58   ` Jeffrey J. Kosowsky
     [not found] <fa.dw2l5ZM+UL3xoF6IYh5RLMmbYfw@ifi.uio.no>
     [not found] ` <fa.XOM1F85uBvmj4QzZKaDu36nYBk0@ifi.uio.no>
     [not found]   ` <fa.rviZJBmVqkAE5uxDjhJOpIuKT4g@ifi.uio.no>
     [not found]     ` <fa.OPVERUiJ763jH2/QynTxgBgoKYw@ifi.uio.no>
     [not found]       ` <fa.v3FUjJ43bw2G7KiZGaxqL3tD4xo@ifi.uio.no>
     [not found]         ` <fa.BrNhgY8S+TEOLMiPd27M7YHo9bI@ifi.uio.no>
2009-01-04 16:15           ` Sitsofe Wheeler
2009-01-04 17:26             ` Kyle Moffett

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