From: Alan Stern <stern@rowland.harvard.edu>
To: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Luc Maranget <luc.maranget@inria.fr>,
Akira Yokosawa <akiyks@gmail.com>,
parri.andrea@gmail.com, will@kernel.org, peterz@infradead.org,
boqun.feng@gmail.com, npiggin@gmail.com, dhowells@redhat.com,
j.alglave@ucl.ac.uk, dlustig@nvidia.com, joel@joelfernandes.org,
viro@zeniv.linux.org.uk, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org
Subject: Re: Bug in herd7 [Was: Re: Litmus test for question from Al Viro]
Date: Wed, 7 Oct 2020 22:25:37 -0400 [thread overview]
Message-ID: <20201008022537.GA480405@rowland.harvard.edu> (raw)
In-Reply-To: <20201007223851.GV29330@paulmck-ThinkPad-P72>
On Wed, Oct 07, 2020 at 03:38:51PM -0700, Paul E. McKenney wrote:
> On Wed, Oct 07, 2020 at 03:40:50PM -0400, Alan Stern wrote:
> > On Wed, Oct 07, 2020 at 10:50:40AM -0700, Paul E. McKenney wrote:
> > > And here is the updated version.
> > >
> > > Thanx, Paul
> > >
> > > ------------------------------------------------------------------------
> > >
> > > commit b7cd60d4b41ad56b32b36b978488f509c4f7e228
> > > Author: Alan Stern <stern@rowland.harvard.edu>
> > > Date: Tue Oct 6 09:38:37 2020 -0700
> > >
> > > manual/kernel: Add LB+mb+data litmus test
> >
> > Let's change this to:
> >
> > manual/kernel: Add LB data dependency test with no intermediate variable
> >
> > Without that extra qualification, people reading just the title would
> > wonder why we need a simple LB litmus test in the archive.
> I might get this right sooner or later. You never know.
>
> Like this?
>
> Thanx, Paul
Paul, I think you must need new reading glasses. You completely missed
the text above.
Alan
> ------------------------------------------------------------------------
>
> commit 5b6a4ff2c8ad25fc77f4151e71e6cbd8f3268d7b
> Author: Alan Stern <stern@rowland.harvard.edu>
> Date: Tue Oct 6 09:38:37 2020 -0700
>
> manual/kernel: Add LB+mb+data litmus test
>
> Test whether herd7 can detect a data dependency when there is no
> intermediate local variable, as in WRITE_ONCE(*x, READ_ONCE(*y)).
> Commit 0f3f8188a326 in herdtools fixed an oversight which caused such
> dependencies to be missed.
>
> Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
next prev parent reply other threads:[~2020-10-08 2:25 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-01 4:51 Litmus test for question from Al Viro Paul E. McKenney
2020-10-01 16:15 ` Alan Stern
2020-10-01 16:36 ` Al Viro
2020-10-01 18:39 ` Alan Stern
2020-10-01 19:29 ` Al Viro
2020-10-01 21:30 ` Paul E. McKenney
2020-10-03 2:01 ` Alan Stern
2020-10-03 13:22 ` Alan Stern
2020-10-03 15:16 ` Akira Yokosawa
2020-10-03 17:13 ` Bug in herd7 [Was: Re: Litmus test for question from Al Viro] Alan Stern
2020-10-03 22:50 ` Akira Yokosawa
2020-10-04 1:40 ` [PATCH] tools: memory-model: Document that the LKMM can easily miss control dependencies Alan Stern
2020-10-04 21:07 ` joel
2020-10-04 23:12 ` Paul E. McKenney
2020-10-05 15:15 ` Bug in herd7 [Was: Re: Litmus test for question from Al Viro] Luc Maranget
2020-10-05 15:53 ` Alan Stern
2020-10-05 16:52 ` Paul E. McKenney
2020-10-05 18:19 ` Alan Stern
2020-10-05 19:18 ` Paul E. McKenney
2020-10-05 19:48 ` Alan Stern
2020-10-06 16:39 ` Paul E. McKenney
2020-10-06 17:05 ` Alan Stern
2020-10-07 17:50 ` Paul E. McKenney
2020-10-07 19:40 ` Alan Stern
2020-10-07 22:38 ` Paul E. McKenney
2020-10-08 2:25 ` Alan Stern [this message]
2020-10-08 2:50 ` Paul E. McKenney
2020-10-08 14:01 ` Alan Stern
2020-10-08 18:32 ` Paul E. McKenney
2020-10-05 15:54 ` Paul E. McKenney
2020-10-04 23:31 ` Litmus test for question from Al Viro Paul E. McKenney
2020-10-05 2:38 ` Alan Stern
2020-10-05 8:20 ` Will Deacon
2020-10-05 9:12 ` Will Deacon
2020-10-05 14:01 ` Paul E. McKenney
2020-10-05 14:23 ` Alan Stern
2020-10-05 15:13 ` Will Deacon
2020-10-05 15:16 ` Alan Stern
2020-10-05 15:35 ` Peter Zijlstra
2020-10-05 15:49 ` Paul E. McKenney
2020-10-05 14:16 ` Alan Stern
2020-10-05 14:03 ` Paul E. McKenney
2020-10-05 14:24 ` Alan Stern
2020-10-05 14:44 ` joel
2020-10-05 15:55 ` Paul E. McKenney
2020-10-05 8:36 ` David Laight
2020-10-05 13:59 ` Paul E. McKenney
2020-10-03 16:08 ` joel
2020-10-03 16:11 ` joel
2020-10-04 23:13 ` Paul E. McKenney
2020-10-03 2:35 ` Jon Masters
2020-10-04 23:32 ` Paul E. McKenney
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