[ntp:questions] how to force NTP to use GPS

Uwe Klein uwe at klein-habertwedt.de
Tue Feb 14 08:27:21 UTC 2012

David Woolley wrote:
> Uwe Klein wrote:
>> semi OT ( either OnTopic or OffTopic ;-):
>> What happens if I kill ntpd during clock slewing ?
>> What happens if I SIGTERM ntpd during clock slewing ?

> Linux implementations, at least, will retain frequency corrections in 
> kernel discipline mode and lose them in user space discipline mode.

SIGKILL would bypass any take down action while
SIGTERM can be caught and used for dedicated "return to normal" actions.

Just asking as I too had run across clock galloping hord syndrome
when restarting ntpd in intermediate timed (1..3 minutes ) succession.


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