stap early exit

[Frank Ch. Eigler]

Srinivasa D S <srinivasa@in.ibm.com> writes:

> [...]  I had encountered this kind of situation once, when I was
> probing frequently executed kernel function and collecting data in a
> global variable on big-smp system.  I Increased the MAXTRYLOCK
> variable and that solved my problem.

One should see a "WARNING ... skipped probes: NNNN" message for this
case.  Also, it is probable that the locking algorithm could be tuned
better for bigsmp machines, going beyond just tweaking the parameters
by hand.

- FChE