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Date:      Sun, 18 Oct 2015 08:19:34 +0100
From:      David Malone <dwmalone@maths.tcd.ie>
To:        Warner Losh <imp@bsdimp.com>
Cc:        Ian Lepore <ian@freebsd.org>, Cy Schubert <cy@FreeBSD.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   Re: svn commit: r289421 - in head/etc: . mtree ntp
Message-ID:  <20151018071934.GA95077@walton.maths.tcd.ie>
In-Reply-To: <00150EF2-0020-42E5-A1E5-324A23975577@bsdimp.com>
References:  <201510161404.t9GE4GqM046436@repo.freebsd.org> <1445106350.71631.36.camel@freebsd.org> <20151017212033.GA43955@walton.maths.tcd.ie> <00150EF2-0020-42E5-A1E5-324A23975577@bsdimp.com>

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Hi Warner,

I was trying to check Ian's specific concern, that a valid source
of leap seconds might be ignored if a expired leapseconds file was
present. It seems that this is not the case, at lease based on my
reading of the code and comments. I included the references to the
code, so others could check if they wanted.

I actually suggested configuring the leapseconds file by default
to try and improve the vagueries of accepting advertised leap seconds
that you mentioned.

> NTP only recognizes June and December as valid leap insertion
> points.

Interestingly, this code seems to be gone from ntp_loopfilter.c and
based on a quick look through the rest of the code, I can't see a
similar general check. Some of the refclocks do retain this condition,
but the general code path doesn't seem to. Possibly we should take
this up with the NTP guys as a check worth retaining?

	David.



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