Messages in this thread | | | Date | Tue, 9 Jan 2018 11:25:07 +0100 | From | Peter Zijlstra <> | Subject | Re: perf: perf_fuzzer quickly locks up on 4.15-rc7 |
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On Mon, Jan 08, 2018 at 03:29:42PM -0500, Vince Weaver wrote: > 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.
I'll go take a look...
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