linux-kernel - Re: [PATCH 0/3] futex: Use RCU-based per-CPU reference counting

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Message-ID: <20250708075025.GF1613376@noisy.programming.kicks-ass.net>
Date: Tue, 8 Jul 2025 09:50:25 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: linux-kernel@...r.kernel.org,
	André Almeida <andrealmeid@...lia.com>,
	Darren Hart <dvhart@...radead.org>,
	Davidlohr Bueso <dave@...olabs.net>, Ingo Molnar <mingo@...hat.com>,
	Juri Lelli <juri.lelli@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Valentin Schneider <vschneid@...hat.com>,
	Waiman Long <longman@...hat.com>
Subject: Re: [PATCH 0/3] futex: Use RCU-based per-CPU reference counting

On Mon, Jul 07, 2025 at 04:36:20PM +0200, Sebastian Andrzej Siewior wrote:
> Since it was not yet released, should we rip out the IMMUTABLE bits and
> just stick with GET/SET slots?

I suppose that makes sense. If someone ever comes up with another
use-case for it we can always add it back in.