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Date:   Thu, 12 Jul 2018 20:33:44 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Alan Stern <stern@rowland.harvard.edu>
Cc:     Andrea Parri <andrea.parri@amarulasolutions.com>,
        Will Deacon <will.deacon@arm.com>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        LKMM Maintainers -- Akira Yokosawa <akiyks@gmail.com>,
        Boqun Feng <boqun.feng@gmail.com>,
        Daniel Lustig <dlustig@nvidia.com>,
        David Howells <dhowells@redhat.com>,
        Jade Alglave <j.alglave@ucl.ac.uk>,
        Luc Maranget <luc.maranget@inria.fr>,
        Nicholas Piggin <npiggin@gmail.com>,
        Kernel development list <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH v2] tools/memory-model: Add extra ordering for locks and
 remove it for ordinary release/acquire
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References: <20180712134821.GT2494@hirez.programming.kicks-ass.net>
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On Thu, Jul 12, 2018 at 01:04:27PM -0400, Alan Stern wrote:
> Which raises the question of whether RCtso (adopting Daniel's suggested
> term) is also too subtle or counter-intuitive for spinlocks. 

IMO yes, RCtso also sucks :-) But in my 'fight' for RCsc it disallows
RCpc and captures the current state of affairs more accurately.