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SubjectRe: perf_fuzzer compiled for x32 causes reboot
On Sat, 1 Mar 2014, Andi Kleen wrote:

> Steven Rostedt <> writes:
> >
> > BTW, is the perf_fuzzer code posted somewhere? It sounds like it can be
> > really useful for us to do our own testing too.
> I believe it's part of trinity.
> Perhaps it should have a "ftracer fuzzer" too?

It's not part of trinity, it's a separate project that re-uses some
of trinity's codebase.

You can get the source as part of the perf_event_tests package

go into the fuzzer directory, run make, then "./perf_fuzzer".
You can also run the ./ script instead, it's what I've
been using to track this kernel issue, although it tripped over the issue
a lot faster when compiled with -mx32 than it did when complied as native

I think the code as found in the git tree should be working, I made a lot
of changes when tracking this problem and I need to make sure I only check
in the proper ones and not let any weird debugging patches slip in.

I'm aware of at least two other WARN messages and possibly one or two
hard-lockup bugs in addition to the potential system reboot that can be
triggered by the fuzzer, it just takes a while to isolate these things.


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