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Date:   Thu, 5 Jul 2018 10:23:01 -0400 (EDT)
From:   Alan Stern <stern@rowland.harvard.edu>
To:     Will Deacon <will.deacon@arm.com>
cc:     "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        Andrea Parri <andrea.parri@amarulasolutions.com>,
        LKMM Maintainers -- Akira Yokosawa <akiyks@gmail.com>,
        Boqun Feng <boqun.feng@gmail.com>,
        David Howells <dhowells@redhat.com>,
        Jade Alglave <j.alglave@ucl.ac.uk>,
        Luc Maranget <luc.maranget@inria.fr>,
        Nicholas Piggin <npiggin@gmail.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Kernel development list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/2] tools/memory-model: Add write ordering by release-acquire
 and by locks
In-Reply-To: <20180704121354.GC26941@arm.com>
Message-ID: <Pine.LNX.4.44L0.1807051021510.1697-100000@iolanthe.rowland.org>
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On Wed, 4 Jul 2018, Will Deacon wrote:

> On Wed, Jul 04, 2018 at 04:28:52AM -0700, Paul E. McKenney wrote:
> > On Tue, Jul 03, 2018 at 01:28:17PM -0400, Alan Stern wrote:
> > > PS: Paul, is the patch which introduced rel-rf-acq-po currently present
> > > in any of your branches?  I couldn't find it.
> > 
> > It is not, I will add it back in.  I misinterpreted your "drop this
> > patch" on 2/2 as "drop both patches".  Please accept my apologies!
> > 
> > Just to double-check, the patch below should be added, correct?
> 
> Hang on, I'm not sure this patch is quite right either. We need to reach
> agreement on whether or not we want to support native RCpc acquire/release
> instructions before we work out what to do with this relation.

Agreed.  Paul, please leave both patches reverted.  I will send 
replacements.

Alan