linux-kernel - Re: [PATCH -v4 00/10] FUTEX_UNLOCK

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Date:   Sat, 17 Dec 2016 14:52:14 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Darren Hart <dvhart@...radead.org>
Cc:     tglx@...utronix.de, mingo@...nel.org, juri.lelli@....com,
        rostedt@...dmis.org, xlpang@...hat.com, bigeasy@...utronix.de,
        linux-kernel@...r.kernel.org, mathieu.desnoyers@...icios.com,
        jdesfossez@...icios.com, bristot@...hat.com
Subject: Re: [PATCH -v4 00/10] FUTEX_UNLOCK_PI wobbles

On Fri, Dec 16, 2016 at 03:31:40PM -0800, Darren Hart wrote:
> On Tue, Dec 13, 2016 at 09:36:38AM +0100, Peter Zijlstra wrote:
> > That way, when we drop hb->lock to wait, futex and rt_mutex wait state is
> > consistent.
> > 
> > 
> > In any case, it passes our inadequate testing.
> 
> It passed my CI tools/testing/selftests/futex/functional/run.sh. Did you also
> happen to run a fuzz tester?

I did not. I'm not sure how good trinity is at poking holes in futexes.
I would love a domain specific fuzzer for futex, but I suspect it would
end up being me writing it :-(