linux-kernel - Re: perf: perf_fuzzer quickly locks up on 4.15-rc7

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Message-ID: <20180111204228.GF3397@worktop>
Date:   Thu, 11 Jan 2018 21:42:28 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Vince Weaver <vincent.weaver@...ne.edu>
Cc:     Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: Re: perf: perf_fuzzer quickly locks up on 4.15-rc7

On Thu, Jan 11, 2018 at 03:15:16PM -0500, 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.

That certainly reduces the amount of code to stare at. Will do so
tomorrow. Thanks!