From: Alexander Shishkin <alexander.shishkin@linux.intel.com>
To: Will Deacon <will.deacon@arm.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
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, 23 Aug 2016 20:08:23 +0300 [thread overview]
Message-ID: <87vayrl8fs.fsf@ashishki-desk.ger.corp.intel.com> (raw)
In-Reply-To: <20160823151239.GA29462@arm.com>
Will Deacon <will.deacon@arm.com> writes:
> Hi Alexander,
>
> On Fri, Aug 12, 2016 at 08:54:49PM +0300, Alexander Shishkin wrote:
>> Yes, I tracked to a race between unmapping and set_output, trying to
>> come up with a good fix now.
>
> Did you get anywhere with this? I think I just hit the same issue with
> the intel-pt driver on my broadwell laptop with -rc3+PREEMPT (dump
> below) and I'm more than happy to test a fix.
Yes, I posted a patchset [1] this morning that should fix this; if this
is PT, 3/3 should suffice.
What's "pt-poker", btw? :)
[1] http://marc.info/?l=linux-kernel&m=147194269031047
Regards,
--
Alex
next prev parent reply other threads:[~2016-08-23 17:09 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-08 20:22 perf: WARNING: kernel/events/core.c:4893 perf_mmap_close Vince Weaver
2016-08-09 5:15 ` Alexander Shishkin
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 [this message]
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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