linux-kernel - Re: [PATCH 5/5] locking/mcs: Relax to atomic/release semantics

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Message-ID: <CA+55aFxCmqz-ZXB7Fs8S0+57ckseqSJtCd_JfN49Lpt5Fr2YEQ@mail.gmail.com>
Date:	Sun, 20 Sep 2015 11:26:32 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Davidlohr Bueso <dave@...olabs.net>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Will Deacon <will.deacon@....com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Davidlohr Bueso <dbueso@...e.de>
Subject: Re: [PATCH 5/5] locking/mcs: Relax to atomic/release semantics

On Sun, Sep 20, 2015 at 3:11 AM, Davidlohr Bueso <dave@...olabs.net> wrote:
> ... by using acquire semantics where appropriate As such, weakly
> ordered archs can benefit from more relaxed use of barriers when
> issuing atomics.

Again, subject is wrong.

Also, I actually think you should avoid using the word "relax", since
that actually has a separate meaning for the atomics, and it is *not*
using those relaxed semantics, and they wouldn't work anyway.

So you might as well just say something like

    "locking: use acquire/release semantics"

or similar. Ok?

                Linus
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