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

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Message-ID: <alpine.DEB.2.21.1801090841300.15884@macbook-air>
Date:   Tue, 9 Jan 2018 08:44:23 -0500 (EST)
From:   Vince Weaver <vincent.weaver@...ne.edu>
To:     Peter Zijlstra <peterz@...radead.org>
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>
Subject: Re: perf: perf_fuzzer quickly locks up on 4.15-rc7

On Tue, 9 Jan 2018, Peter Zijlstra wrote:

> So remind me again, how are you running that fuzzer? I'm running
> ./fast_repro99.sh as root.

I'm running ./fast_repro98.sh on a regular haswell machine with paranoid 
set to "0".

I'll try your patch and see if it makes a difference.

I can also try on a few other machines.  I started setting up a fuzzing 
cluster for this kind of thing but the multiport serial card I got for 
logging the serial consoles crashes fairly quickly under load and I 
haven't had time to track that down.

Vince