I've heard a lot of incoherent things about Linux and leapsecond problems. Here's something coherent: http://landslidecoding.blogspot.com/2012/07/linuxs-leap-second-deadlocks.html I have a NetBSD system with a GPS timing receiver running as NTP stratrum 1, and had set up the leap second file so that it would have the leap warning bits. As far as I can tell it and all other NetBSD systems not at stratum 1 handled the leap just fine. So this is really just a warning if anyone is thinking about putting in special-purpose leap second code - it seems far safer to treat it as a 1s-step in time, using the normal stepping mechanism.
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