From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-kernel@vger.kernel.org, mingo@kernel.org,
parri.andrea@gmail.com, will.deacon@arm.com,
peterz@infradead.org, boqun.feng@gmail.com, npiggin@gmail.com,
dhowells@redhat.com, j.alglave@ucl.ac.uk, luc.maranget@inria.fr,
akiyks@gmail.com
Subject: Re: [PATCH RFC tip/lkmm 04/10] EXP litmus_tests: Add comments explaining tests' purposes
Date: Fri, 9 Feb 2018 17:05:03 -0800 [thread overview]
Message-ID: <20180210010503.GD3617@linux.vnet.ibm.com> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1802091345180.1460-100000@iolanthe.rowland.org>
On Fri, Feb 09, 2018 at 01:46:30PM -0500, Alan Stern wrote:
> On Fri, 9 Feb 2018, Paul E. McKenney wrote:
>
> > This commit adds comments to the litmus tests summarizing what these
> > tests are intended to demonstrate.
> >
> > Suggested-by: Ingo Molnar <mingo@kernel.org>
> > Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
> > [ paulmck: Apply Andrea's and Alan's feedback. ]
> > ---
>
> > --- a/tools/memory-model/litmus-tests/IRIW+poonceonces+OnceOnce.litmus
> > +++ b/tools/memory-model/litmus-tests/IRIW+poonceonces+OnceOnce.litmus
> > @@ -1,5 +1,15 @@
> > C IRIW+poonceonces+OnceOnce
> >
> > +(*
> > + * Result: Never
> > + *
> > + * Test of independent reads from independent writes with nothing
> > + * between each pairs of reads. In other words, is anything at all
> > + * needed to cause two different reading processes to agree on the order
> > + * of a pair of writes, where each write is to a different variable by a
> > + * different process?
> > + *)
>
> The result should be Sometimes.
Right you are, and better yet, the memory model agrees with you.
I have fixed this, thank you for the careful review!
Thanx, Paul
next prev parent reply other threads:[~2018-02-10 1:04 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-09 14:18 [PATCH RFC tools/lkmm] Miscellaneous fixes Paul E. McKenney
2018-02-09 14:20 ` [PATCH RFC tip/lkmm 01/10] tools/memory-model: Clarify the origin/scope of the tool name Paul E. McKenney
2018-02-09 14:20 ` [PATCH RFC tip/lkmm 02/10] MAINTAINERS: Add the Memory Consistency Model subsystem Paul E. McKenney
2018-02-09 14:20 ` [PATCH RFC tip/lkmm 03/10] MAINTAINERS: List file memory-barriers.txt within the LKMM entry Paul E. McKenney
2018-02-09 14:20 ` [PATCH RFC tip/lkmm 04/10] EXP litmus_tests: Add comments explaining tests' purposes Paul E. McKenney
2018-02-09 18:46 ` Alan Stern
2018-02-10 1:05 ` Paul E. McKenney [this message]
2018-02-09 14:20 ` [PATCH RFC tip/lkmm 05/10] README: Fix a couple of punctuation errors Paul E. McKenney
2018-02-09 14:20 ` [PATCH RFC tip/lkmm 06/10] EXP MAINTAINERS: Add the "LKMM" acronym Paul E. McKenney
2018-02-09 14:20 ` [PATCH RFC tip/lkmm 07/10] MAINTAINERS: Add Akira Yokosawa as an LKMM reviewer Paul E. McKenney
2018-02-09 14:20 ` [PATCH RFC tip/lkmm 08/10] EXP Remove understore from smp_mb__before_atomic() workings Paul E. McKenney
2018-02-15 22:30 ` Andrea Parri
2018-02-15 22:49 ` Paul E. McKenney
2018-02-15 23:19 ` Andrea Parri
2018-02-15 23:32 ` Paul E. McKenney
2018-02-09 14:20 ` [PATCH RFC tip/lkmm 09/10] EXP Remove underscore from smp_mb__after_atomic() workings Paul E. McKenney
2018-02-09 14:20 ` [PATCH RFC tip/lkmm 10/10] EXP Remove underscores from smp_mb__after_spinlock() workings Paul E. McKenney
2018-02-09 16:02 ` [PATCH RFC tools/lkmm] Miscellaneous fixes Akira Yokosawa
2018-02-09 16:06 ` [PATCH] tools/memory-model: Restore compat with herd7 7.47 ("-" -> "_") Akira Yokosawa
2018-02-09 23:46 ` [PATCH v2] tools/memory-model: Make " Akira Yokosawa
2018-02-10 1:07 ` Paul E. McKenney
2018-02-10 3:03 ` Akira Yokosawa
2018-02-11 11:51 ` Ingo Molnar
2018-02-13 1:38 ` Paul E. McKenney
2018-02-13 8:32 ` Ingo Molnar
2018-02-14 22:20 ` Akira Yokosawa
2018-02-14 22:52 ` Paul E. McKenney
2018-02-15 15:10 ` Alan Stern
2018-02-15 15:58 ` Trial of conflict resolution of Alan's patch Akira Yokosawa
2018-02-15 17:51 ` Alan Stern
2018-02-15 19:29 ` Paul E. McKenney
2018-02-15 21:51 ` Akira Yokosawa
2018-02-16 15:18 ` Alan Stern
2018-02-16 15:47 ` Andrea Parri
2018-02-16 16:53 ` Paul E. McKenney
2018-02-16 22:22 ` [PATCH] tools/memory-model: remove rb-dep, smp_read_barrier_depends, and lockless_dereference Alan Stern
2018-02-16 23:22 ` Akira Yokosawa
2018-02-17 0:39 ` Paul E. McKenney
2018-02-21 15:00 ` Alan Stern
2018-02-21 16:06 ` Paul E. McKenney
2018-02-21 16:51 ` Ingo Molnar
2018-02-21 17:53 ` Paul E. McKenney
2018-02-21 17:15 ` [PATCH] tools/memory-model: update: " Alan Stern
2018-02-21 17:58 ` Andrea Parri
2018-02-21 18:14 ` Paul E. McKenney
2018-02-21 18:00 ` Paul E. McKenney
2018-02-21 22:29 ` Akira Yokosawa
2018-02-24 3:22 ` Akira Yokosawa
2018-02-24 3:30 ` Paul E. McKenney
2018-02-24 14:36 ` Andrea Parri
2018-02-24 16:49 ` Alan Stern
2018-02-24 18:08 ` Paul E. McKenney
2018-02-24 22:47 ` Akira Yokosawa
2018-02-25 22:33 ` Paul E. McKenney
2018-02-17 3:25 ` [PATCH] tools/memory-model: " Andrea Parri
2018-02-17 15:14 ` Andrea Parri
2018-02-19 17:14 ` Alan Stern
2018-02-19 17:43 ` Peter Zijlstra
2018-02-19 17:44 ` Peter Zijlstra
2018-02-20 14:48 ` Paul E. McKenney
2018-02-20 15:17 ` Andrea Parri
2018-02-20 16:11 ` Paul E. McKenney
2018-02-19 19:41 ` Paul E. McKenney
2018-02-19 20:28 ` Peter Zijlstra
2018-02-20 14:49 ` Paul E. McKenney
2018-02-20 15:11 ` Alan Stern
2018-02-20 16:10 ` Paul E. McKenney
2018-02-20 9:33 ` Andrea Parri
2018-02-20 9:51 ` Peter Zijlstra
2018-02-20 15:38 ` Alan Stern
2018-02-15 22:05 ` Trial of conflict resolution of Alan's patch Andrea Parri
2018-02-15 22:41 ` Paul E. McKenney
2018-02-18 15:46 ` [PATCH v2] tools/memory-model: Make compat with herd7 7.47 ("-" -> "_") Akira Yokosawa
2018-02-20 14:57 ` Paul E. McKenney
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