linux-kernel - Re: Bug: Status/Summary of slashdot leap-second crash on new years 2008-2009

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Message-ID: <3ae3aa420901052053m5a410671u13ecccfb7e29260c@mail.gmail.com>
Date:	Mon, 5 Jan 2009 22:53:46 -0600
From:	"Linas Vepstas" <linasvepstas@...il.com>
To:	"john stultz-lkml" <johnstul.lkml@...il.com>
Cc:	david@...g.hm, "Nick Andrew" <nick@...k-andrew.net>,
	"David Newall" <davidn@...idnewall.com>,
	"Kyle Moffett" <kyle@...fetthome.net>,
	"Ben Goodger" <goodgerster@...il.com>,
	"Robert Hancock" <hancockr@...w.ca>, linux-kernel@...r.kernel.org,
	"Jeffrey J. Kosowsky" <jeff@...owsky.org>,
	MentalMooMan <slashdot@...eshallam.info>,
	"Travis Crump" <pretzalz@...hhouse.org>, burdell@...ntheinter.net,
	mills@...l.edu, "Brian Haberman" <brian@...ovationslab.net>,
	"Karen O'Donoghue" <karen.odonoghue@...y.mil>,
	ntpwg@...ts.ntp.isc.org, zippel@...ux-m68k.org
Subject: Re: Bug: Status/Summary of slashdot leap-second crash on new years 2008-2009

2009/1/5 john stultz-lkml <johnstul.lkml@...il.com>:
> On Mon, Jan 5, 2009 at 9:42 AM, Linas Vepstas <linasvepstas@...il.com> wrote:
> [snip]
>> The long term solution would be write an RFC to extend
>> NTP to also provide TAI information -- e.g. to add a
>> message that indicates the current leap-second offset
>> between UTC and TAI.
>
> I believe Roman has already added this ability:
> http://git.kernel.org/gitweb.cgi?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=153b5d054ac2d98ea0d86504884326b6777f683d;hp=9f14f669d18477fe3df071e2fa4da36c00acee8e

Well, you're answering a different statment than what
I was talking about -- I wanted to make sure that TAI
information was available via NTP -- this has nothing
to do with the kernel, and would be something available
to all operating systems.

Anyway -- I'm looking at the patch you reference, and
maybe I'm being dumb -- but -- I think I see a bug.

case TIME_DEL decrements TAI, but TIME_INS does
not increment it. Instead, there's a lonely increment in
TIME_OOP which seems wrong.  ??


--linas
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