staprun:init_cap:73: ERROR: cap_set_proc: Operation not permitted

[Dave Nomura]

Does anyone have any insight into this error:
staprun:init_cap:73: ERROR: cap_set_proc: Operation not permitted
I am invoking stap via:
stap -vvvv -g -m sstep  -I itrace -I itrace/ppc64 sstep.stp -c 
"/home/dcn/work/taptrace/probeme4 10000"

This looks like it is coming from the staprun program in cap.c.

The notes from the set_cap_proc man page say:
> The function capsetp should be used with care.  It exists, primar-
>        ily, to overcome a lack of support for capabilities in any of  the
>        filesystems  supported  by  Linux.  The semantics of this function
>        may change as it is better understood.  Please note,  by  default,
>        the  only  processes  that  have CAP_SETPCAP available to them are
>        processes started as a kernel-thread.   (Typically  this  includes
>        init(8),  kflushd and kswapd). You will need to recompile the ker-
>        nel to modify this default.
Is this possibly an issue with the type of filesystem where my 
application lives, or is there some sort kernel reconfiguration I need 
to do?  I was missing CONFIG_RELAY, and CONFIG_DEBUG_FS from my kernel 
configuration, so are there any other things that SystemTap needs that I 
might be missing (I have CONFIG_KPROBES=y, and CONFIG_DEBUG_INFO=y)

I'm running on an x86 with SLES10 on 2.6.23-rc5-default with the uprobes 
patch and am using utrace.
I can't find anything called init_cap in my generated module source, or 
in the SystemTap runtime source.

dogbert% stap -V
SystemTap translator/driver (version 0.6/0.129 built 2007-09-24)
Copyright (C) 2005-2007 Red Hat, Inc. and others
This is free software; see the source for copying conditions.
dogbert% uname -a
Linux dogbert 2.6.23-rc5-default #4 Tue Sep 25 15:47:38 PDT 2007 i686 
i686 i386 GNU/Linux

-- 
Dave Nomura
LTC Linux Power Toolchain