------- Comment From [email protected] 2019-07-16 01:49 EDT-------
>
> Anju - we missing something else?

Hi Michael,

This seems to be a different issue. Not related to thread-imc. Similar perf 
fuzzer issues are reported in
https://bugzilla.linux.ibm.com/show_bug.cgi?id=161854
https://bugzilla.linux.ibm.com/show_bug.cgi?id=162507

See this comment:
https://bugzilla.linux.ibm.com/show_bug.cgi?id=162507#c37

One workaround can be: try with these patches as well:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3202e35ec1c8fc19cea24253ff83edf702a60a02

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=913a90bc5a3a06b1f04c337320e9aeee2328dd77

Above patches fixes two issues. But there are still cases where lockup
can still happen.

Thanks,
Anju

** Bug watch added: bugzilla.linux.ibm.com/ #161854
   https://bugzilla.linux.ibm.com/show_bug.cgi?id=161854

** Bug watch added: bugzilla.linux.ibm.com/ #162507
   https://bugzilla.linux.ibm.com/show_bug.cgi?id=162507

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https://bugs.launchpad.net/bugs/1752002

Title:
  [P9,POwer NV][WSP][DD2.1][Ubuntu 1804][Perf fuzzer] : Call trace is
  seen while running perf fuzzer (perf:)

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