Messages in this thread | | | From | Vince Weaver <> | Date | Mon, 8 Jan 2018 15:29:42 -0500 (EST) | Subject | Re: perf: perf_fuzzer quickly locks up on 4.15-rc7 |
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On Mon, 8 Jan 2018, Ingo Molnar wrote: > > 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.
Yes, it seems to be a KPTI issue.
With KPTI disabled I can fuzz for a few hours, no problems.
With KPTI enabled the perf_fuzzer on this haswell machine will lock up within minutes.
It's a hard lockup with nothing over the serial console. It is not deterministic/reproducible either.
Vince
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