Re: [pcp] qa/518 tweaks on pcpfans.git fche/dev

[Nathan Scott <nathans@xxxxxxxxxx>]

Hi Ken,

----- Original Message -----
> [...]
> 3. Frank's observations about pmie and signals is a bit concerning, although
> I see evidence of "try TERM and if that does not work try KILL and repeat
> until successful or timeout" in the pmie init script, so perhaps this is a
> long standing problem that has been masked by hackery.  pmie does have a
> TERM signal handler and a delayed exit but only after the nanosleep() ... so
> if we are blocked somewhere else, or don't abandon expression evaluation
> completely when an I/O returns with EINTR then we could be off in the weeds
> long enough for some script to believe pmie has not died.
> 
> Any insight into 3. would be helpful.

The pmie (init/check) scripts were initially close cousins to the pmlogger
scripts - the sigterm-upgrade-to-sigkill there is very likely to be mainly
for historical reasons, rather than tackling any pmie specific issue.

cheers.

--
Nathan