Re: perf: perf_fuzzer quickly locks up on 4.15-rc7
From: Peter Zijlstra
Date: Thu Jan 11 2018 - 15:57:13 EST
On Thu, Jan 11, 2018 at 03:40:44PM -0500, Vince Weaver wrote:
> On Thu, 11 Jan 2018, Vince Weaver wrote:
>
> > Not sure if this info helps, but if I make perf_fuzzer *not* create AUX
> > mmap() buffers, I'm unable to reproduce the hangs both on core2 and
> > haswell.
>
> Confirmed, I can crash the system without the fuzzer, just by doing
>
> perf record --per-thread -e intel_bts// /bin/ls
>
> on my haswell system.
It makes my IVB very ill, starts spewing RCU stall warnings, but is
otherwise very unresponsive.
Awesome... I'll prod at it when my brain works again.