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Kernel prepatch 3.5-rc5

Kernel prepatch 3.5-rc5

Posted Jul 2, 2012 14:25 UTC (Mon) by kjp (subscriber, #39639)
In reply to: Kernel prepatch 3.5-rc5 by jstultz
Parent article: Kernel prepatch 3.5-rc5

OK, It's high time (haha) to get moving on UTC-SLS (smoothed leap seconds). This is insanity.

Seriously, is there an NTP daemon that can do this.

- Karl


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Kernel prepatch 3.5-rc5

Posted Jul 2, 2012 16:03 UTC (Mon) by mikemol (subscriber, #83507) [Link]

I was under the impression that NTP updated small time differences using the 'slew' method. I honestly expected the leap second would slowly propagate via stratum after stratum of clock slewing...

It seems I need to read up more on NTP.

Kernel prepatch 3.5-rc5

Posted Jul 2, 2012 16:30 UTC (Mon) by dgm (subscriber, #49227) [Link]

A time difference is not the same as a leap second. The former comes from a clock running out of sync with the reference one, while the later means some minutes are 61 seconds long on all clocks, even the reference one.

Kernel prepatch 3.5-rc5

Posted Jul 2, 2012 16:33 UTC (Mon) by mikemol (subscriber, #83507) [Link]

My expectation was that the leap second would be *communicated* as a time difference. I.e. have the stratum N time sources appear to themselves to have gotten 1 second behind their stratum N-1 time sources, and slew back to resync.

Leap seconds

Posted Jul 2, 2012 20:11 UTC (Mon) by midg3t (subscriber, #30998) [Link]

Impending leap seconds are explicitly signaled in NTP payloads on the day of the leap second. Search for "Leap Indicator" in RFC 2030.

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