Nick G wrote:
True or False or Insufficient-Data: According to the man page and doc.ntp.org, "kernel time discipline is disabled" if my local ntpd uses "-x". So if my local ntpd loses its one-and-only parent NTP server, the local ntpd will no longer enforce any discipline whatsoever on the local clock. In other words, my local ntpd is literally doing nothing, just consuming a little RAM and a few cycles every now and then.
False. It will continue to use the user space time discipline it has been using all along. This has a one second sawtooth, so is not as accurate as the kernel space discipline, which applies corrections on every clock interrupt. However, it will still apply the last known frequency correction.
Stricly speaking, -x is equivalent to tinkering with a very large value for the offset before ntpd will step, and it is that large value that actually forces the fallback to the user space time discipline.
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