linux-kernel - Re: [RFC][PATCH 0/4] FUTEX_UNLOCK

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Message-ID: <20161005010214.GA32728@linux-80c1.suse>
Date:   Tue, 4 Oct 2016 18:02:14 -0700
From:   Davidlohr Bueso <dave@...olabs.net>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     mingo@...nel.org, tglx@...utronix.de, 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: [RFC][PATCH 0/4] FUTEX_UNLOCK_PI wobbles

On Mon, 03 Oct 2016, Peter Zijlstra wrote:

>
>Hi,
>
>During my last PI failing patch set it became obvious there's a number of
>related fail in FUTEX_UNLOCK_PI that needed sorting before we can move on
>with that stuff.
>
>These here patches are the result of staring at that code for a wee bit.
>
>Please have a very _very_ careful look at the last patch, it appears to not
>explode when running:
>
>  - perf bench futex lock-pi
>  - selftests/futex
>
>but given the immense amount of tricky involved with both PI and futex there is
>bound to be something I've overlooked.
>
>Do people have more/better futex-pi test cases?

pi_stress.