calcru: negative time... lots of odd "errors"

[Heath Volmer]

Hopefully this one will get through...
 
I've searched exhaustively for an answer to this question, and can only
get answers that aren't entirely clear to me.
 
I'm getting messages like: calcru: negative time of -630883 usec for pid
537(sh).
 
Getting probably 40 or so at boot and an occasional one during use.
 
This a new 5.1 install on an older K6 500Mhz system that was given to
me.
 
I have read something about a sysctl command (no good.)
 
Also have seen something about a kernel TIMECOUNTER (I think) config
value.
 
I've also seen something about PnP, bios settings, IRQ probs, etc.  I'm
a bit too new at this to know where to take it.
 
Help!
 
Thanks, Heats