chrony switch source issue

"Bernstein, Amit" <[email protected]> Thu, 22 Dec 2022 13:35:34 +0000

Newsgroups	gmane.comp.time.chrony.user
Message-ID	<[email protected]>

Hi,
If configuring chrony sources to PHC and NTP, and while PHC is the current chosen source,
In case PHC source returns zero timestamp (get_phc_sample<https://github.com/mlichvar/chrony-nts/blob/master/sys_linux.c#L694>) Chrony will validate the timestamp, calculate the source score and will switch to a better source (NTP) as expected
But in case PHC source returns a failed status (for example -EIO)  Chrony will not switch the sources and will stay on PHC source for an infinite time
Although Chrony debug logs indicates the error:
sys_linux.c:859:(get_phc_sample) ioctl(PTP_SYS_OFFSET) failed : Input/output error

Is that a wanted behavior?
Thanks