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Re: perf: WARNING: kernel/events/core.c:4893 perf_mmap_close

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Vince Weaver <vincent.weaver@maine.edu> writes:

> Hello
>
> running the perf_fuzzer on Haswell, this is a new warning I don't think 
> I've seen before.
>
> It works out to be this code here:
>
>                 /* this has to be the last one */
>                 rb_free_aux(rb);
>                 WARN_ON_ONCE(atomic_read(&rb->aux_refcount));
>
>                 mutex_unlock(&event->mmap_mutex);

Awesome, I'll have a look. Can you tell it it was messing around with
intel_bts driver from the fuzzer log?

Thanks,
--
Alex

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perf: WARNING: kernel/events/core.c:4893 perf_mmap_close Vince Weaver <vincent.weaver@maine.edu> - 2016-08-08 22:30 +0200
  Re: perf: WARNING: kernel/events/core.c:4893 perf_mmap_close Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2016-08-09 07:20 +0200
    Re: perf: WARNING: kernel/events/core.c:4893 perf_mmap_close Vince Weaver <vincent.weaver@maine.edu> - 2016-08-09 14:50 +0200
    Re: perf: WARNING: kernel/events/core.c:4893 perf_mmap_close Vince Weaver <vincent.weaver@maine.edu> - 2016-08-09 15:00 +0200

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