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SubjectRe: perf: perf_fuzzer quickly locks up on 4.15-rc7

* Vince Weaver <vincent.weaver@maine.edu> wrote:

> Hello
>
> Was trying out current git (4.15-rc7) and the perf_fuzzer very quickly
> will lock up my Haswell test machine so solidly that I don't get any debug
> info, even with a serial console.

That's pretty concerning ...

> I'll try enabling various debug options to see if I can get a more useful
> bug report.

Note that the page table isolation (PTI) feature has a number of effects on perf
and on NMI handlers, so one of the things to try would be to disable PTI.

Thanks,

Ingo

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