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MFC r314946:

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Configure leap-second smearing (always).

Leap-second smearing is an experimental option that may be specified in
ntp.conf(5) and the -x option on the command line to spread the effect
of a leap-second over an interval as specified by the leapsmearinterval
config file statement. Recommended values are between 7200 (2 hours) and
86400 (24 hours).

It is advised that leap-second smearing not be used for public NTP
servers (https://www.meinbergglobal.com/download/burnicki/Leap\
%20Second%20Smearing%20With%20NTP.pdf). It is also advised that NTP
clients not use a mix of NTP servers using leap-second smearing with
NTP servers not using leap-second smearing as that could cause
undefined client behaviour.

Leap-second smearing was committed to ports net/ntp and net/ntp-devel
by r426825 on 2016-11-22.

Suggested by:	des
This commit is contained in:
Cy Schubert 2017-04-06 06:11:04 +00:00
parent 5ecb8999e8
commit 523701edce
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/stable/10/; revision=316559
1 changed files with 1 additions and 1 deletions
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2
usr.sbin/ntp/config.h
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@ -1336,7 +1336,7 @@
#define LDAP_API_FEATURE_X_OPENLDAP_THREAD_SAFE 1
/* leap smear mechanism */
/* #undef LEAP_SMEAR */
#define LEAP_SMEAR 1
/* Define to any value to include libseccomp sandboxing. */
/* #undef LIBSECCOMP */