My current thought is that if more than (say) 100 consecutive attempts
to read the clocksource get hit with excessive delays, it is time to at
least do a WARN_ON(), and maybe also time to disable the clocksource
due to skew.  The reason is that if reading the clocksource -always-
sees excessive delays, perhaps the clock driver or hardware is to blame.

Thoughts?

On TDX this would be fatal because we don't have a usable fallback source

(just jiffies). Better try as hard as possible.


-Andi