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

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Message-ID: <alpine.DEB.2.21.1801101027330.19647@macbook-air>
Date:   Wed, 10 Jan 2018 10:28:40 -0500 (EST)
From:   Vince Weaver <vincent.weaver@...ne.edu>
To:     Vince Weaver <vincent.weaver@...ne.edu>
cc:     Peter Zijlstra <peterz@...radead.org>,
        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>
Subject: Re: perf: perf_fuzzer quickly locks up on 4.15-rc7

On Tue, 9 Jan 2018, Vince Weaver wrote:
> Also I managed to hit (presumably) the same bug on a skylake machine.  
> That one doesn't have a serial cable hooked up to it, I'll try to see if I 
> can find one.
> 
> I am running debian-unstable with gcc 7.2 if it makes a difference.

I built the kernel with gcc 6.4 in case it would make a difference; it 
didn't.

Also tried turning off the NMI watchdog in case that was interfering, 
didn't help.

Vince