NAME

       warning::pass5 - systemtap pass-5 warnings

DESCRIPTION

       Warnings that occur during pass 5 (execution) can have a variety of causes.

       probe insertion errors
              With any of the systemtap runtimes, it may be possible that the backends are unable
              to insert probe points requested by the systemtap script.  For example, you may see
              errors such as

              WARNING: probe [...] registration error (rc -524)

              (524 is a kernel error code for ENOTSUPP).  These situations are out of systemtap's
              control, and result in some probes not receiving any hits.  This may be  caused  by
              temporary resource constraints or permanent problems.  One common permanent problem
              is such a probe point  being  placed  at  instructions  that  the  runtime  (kernel
              kprobes,  uprobes or dyninst) cannot decode or intercept.  A possible workaround is
              to move the probe points  slightly  in  the  script,  so  as  to  target  a  nearby
              statement, or a caller, or a callee.  See also error::dwarf(7stap).

GATHERING MORE INFORMATION

       Increasing the verbosity of pass-5 with an option such as --vp 00001 can help pinpoint the
       problem.

SEE ALSO

       stap(1),
       http://sourceware.org/systemtap/wiki/TipExhaustedResourceErrors,
       error::pass5(7stap),
       error::reporting(7stap)
       error::dwarf(7stap)

                                                                              ERROR::PASS5(7stap)