This is basically cribbed from regular serial ports, and just adds
hooks to call the pps support routines.
Also, note in the ucom(4) man page that there is about 1 ms of
latency. Discussed on tech-kern in October of 2013, with the only
concern being that someone who didn't know what they were doing might
set up a stratum 1 server, and that somehow might have worse
timekeeping than whatever else that person might have done; the man
page comment is a mitigation for this.
This patch has been live-tested in netbsd-5/i386 and netbsd-6/i386,
and has been running on machines without a USB-serial GPS device for
most of a year with no adverse consequences (very little happens if
the PPS ioctls are not invoked).
Somehow, options(4) ended up with a bizarre claim that DIAGNOSTIC can
reduce performance by 15%. While that might have been true at some
isolated point due to a bug, it's an outlier. Since at least 2BSD,
DIAGNOSTIC has added asserts, resulting in at most
difficult-to-perceived performance degredation, and many people have
been running production systems (meaning systems they intend to use,
rather than debugging targets) with this option. (The decision a
while ago to enable DIAGNOSTIC in -current's GENERIC reflects this; if
it really were a 15% hit such enabling by default would be unreasonable.)
1999, or 2008 depending on what you count as break-up).
In any case in recent twenty years it was easier to get there
through Russia than through Georgia.
(Whether your government recognize it or not is another issue.
If you want to visit it these days, you have to enter Russia.
Following Ukrainians, even before the recent unrest and referendum
it was strongly advised not to discuss this topic with locals there.
At least it was advised not to call Krym a part of Ukraine.)
Fix Kerch' entry as well.
when generating html groff runs netpbm behind your back. Needless to
say we don't have netpbm in base, so this fails on a clean install; so
for now disable generating html for /usr/share/doc by default.
Workaround for PR 48970.
It seems that all available document preparation toolchains are made
of fail.
apb
