[Bug kprobes/5759] probes in sched.c on preempt kernel cause reboot

[jkenisto at us dot ibm dot com]

------- Additional Comments From jkenisto at us dot ibm dot com  2008-02-13 01:09 -------
(In reply to comment #6)
> The translator is supposed to (and on my Fedora rawhide 2.6.24* 
> VM running cvs systemtap, does) block probes on __init type functions.
> 
> % stap -p2 -vvv -e 'probe kernel.function("....") {}' 2>&1 | grep skipping.init
> 
> lists those functions that are excluded from probing due to this issue.
> I wonder why this is not working for your kernel.

Most likely because I didn't pick up the latest stap bits before testing.

Unfortunately, even after I exclude the __init functions from my list, I'm still
seeing some hangs.  I believe probing add_preempt_count or preempt_schedule will
cause a hang.  Other than those, I think the first 160 functions in the list*
are clean.  There's a hang somewhere in 161-170 (show_state_filter -
sys_sched_get_priority_max).  *after removing the init functions


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http://sourceware.org/bugzilla/show_bug.cgi?id=5759

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