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)