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From: Alexander Shishkin <alexander.shishkin@linux.intel.com>
To: Vince Weaver <vincent.weaver@maine.edu>, linux-kernel@vger.kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Arnaldo Carvalho de Melo <acme@kernel.org>
Subject: Re: perf: WARNING: kernel/events/core.c:4893 perf_mmap_close
Date: Tue, 09 Aug 2016 08:15:17 +0300	[thread overview]
Message-ID: <87k2fqmska.fsf@ashishki-desk.ger.corp.intel.com> (raw)
In-Reply-To: <alpine.DEB.2.20.1608081619250.13292@macbook-air>

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

  reply	other threads:[~2016-08-09  5:15 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-08 20:22 Vince Weaver
2016-08-09  5:15 ` Alexander Shishkin [this message]
2016-08-09 12:43   ` Vince Weaver
2016-08-09 12:53   ` Vince Weaver
2016-08-12 17:17   ` Vince Weaver
2016-08-12 17:54     ` Alexander Shishkin
2016-08-23 15:12       ` Will Deacon
2016-08-23 17:06         ` Peter Zijlstra
2016-08-23 17:08         ` Alexander Shishkin
2016-08-24  9:19           ` Will Deacon
2016-08-24 11:44             ` Alexander Shishkin
2016-08-24 13:13             ` [tip:perf/urgent] perf/core: Use this_cpu_ptr() when stopping AUX events tip-bot for Will Deacon

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