Experiences with cvs runtime

[Ananth N Mavinakayanahalli <amavin at redhat dot com>]

Hi,

I was trying to use the probes in the runtime cvs to see if they can be
used to test the kprobes scalability patch prototype. I ran into a few
problems when trying to use kprobe_where_func.c.

This test was carried out on a system that was running a preempt enabled
smp kernel (though the machine itself was uni processor). Digging around
a bit, I see that:

- many runtime (and one relayfs) files use smp_processor_id() without
disabling preemption
- the stp script assumes that relayfs is built in as a kernel module,
while it can be configured tristate (<*>, <M>, <>).

I think any code that touches the kernel needs to be tested for all 
configurations: uni, smp, smp with preemption enabled etc.

Thanks,
Ananth