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From:   Thomas Gleixner <tglx@linutronix.de>
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To:     Nico Pache <npache@redhat.com>, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        Ingo Molnar <mingo@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Darren Hart <dvhart@infradead.org>,
        Davidlohr Bueso <dave@stgolabs.net>,
        =?utf-8?Q?An?= =?utf-8?Q?dr=C3=A9?= Almeida 
        <andrealmeid@collabora.com>, Arjan van de Ven <arjan@infradead.org>
Subject: Re: [RFC 2/3] futex: exit: Print a warning when futex_cleanup fails
In-Reply-To: <20220421190533.1601879-3-npache@redhat.com>
References: <20220421190533.1601879-1-npache@redhat.com>
 <20220421190533.1601879-3-npache@redhat.com>
Date:   Thu, 21 Apr 2022 22:53:34 +0200
Message-ID: <87r15qrwdt.ffs@tglx>
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On Thu, Apr 21 2022 at 15:05, Nico Pache wrote:

> The futex_cleanup routines currently fails silently.
>
> Allow the futex_cleanup routines to fail more verbosely so we can
> leave a message behind for easier debugging/error detecting.

This is a free ticket to spam dmesg for any unpriviledged user.

> Fixes: 0771dfefc9e5 ("[PATCH] lightweight robust futexes: core")

There is nothing to fix, really.

Robust futexes are best effort as I explained you before and spamming
dmesg won't help anything.

Thanks,

        tglx