linux-kernel - Re: mutex_lock issues during poweroff

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Message-ID: <20170908161134.7yb33fkb7nnrkrjc@hirez.programming.kicks-ass.net>
Date:   Fri, 8 Sep 2017 18:11:34 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        Quentin Schulz <quentin.schulz@...e-electrons.com>,
        Mylene Josserand <mylene.josserand@...e-electrons.com>
Subject: Re: mutex_lock issues during poweroff

On Fri, Sep 08, 2017 at 04:43:07PM +0200, Maxime Ripard wrote:

> What commit happened to be the rewrite? 9d659ae14b54 ("locking/mutex:
> Add lock handoff to avoid starvation") ? We backported this one and
> 3ca0ff571b09 ("locking/mutex: Rework mutex::owner"), and still can
> reproduce the issue. Is there any other?

3ca0ff571b09 was the rewrite, 9d659ae14b54 fixed that starvation case.

With those you should be close to what mainline runs I think.