linux-kernel - Re: [PATCH v3 0/5] Documentation/locking/atomic: Add litmus tests for atomic APIs

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Date:   Fri, 28 Feb 2020 14:12:34 +0800
From:   Boqun Feng <boqun.feng@...il.com>
To:     Andrea Parri <parri.andrea@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        Alan Stern <stern@...land.harvard.edu>,
        Will Deacon <will@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Nicholas Piggin <npiggin@...il.com>,
        David Howells <dhowells@...hat.com>,
        Jade Alglave <j.alglave@....ac.uk>,
        Luc Maranget <luc.maranget@...ia.fr>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Akira Yokosawa <akiyks@...il.com>,
        Daniel Lustig <dlustig@...dia.com>,
        Jonathan Corbet <corbet@....net>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        linux-arch@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH v3 0/5] Documentation/locking/atomic: Add litmus tests
 for atomic APIs

On Thu, Feb 27, 2020 at 06:54:41PM +0100, Andrea Parri wrote:
> On Thu, Feb 27, 2020 at 08:40:44AM +0800, Boqun Feng wrote:
> > A recent discussion raises up the requirement for having test cases for
> > atomic APIs:
> > 
> > 	https://lore.kernel.org/lkml/20200213085849.GL14897@hirez.programming.kicks-ass.net/
> > 
> > , and since we already have a way to generate a test module from a
> > litmus test with klitmus[1]. It makes sense that we add more litmus
> > tests for atomic APIs. And based on the previous discussion, I create a
> > new directory Documentation/atomic-tests and put these litmus tests
> > here.
> > 
> > This patchset starts the work by adding the litmus tests which are
> > already used in atomic_t.txt, and also improve the atomic_t.txt to make
> > it consistent with the litmus tests.
> > 
> > Previous version:
> > v1: https://lore.kernel.org/linux-doc/20200214040132.91934-1-boqun.feng@gmail.com/
> > v2: https://lore.kernel.org/lkml/20200219062627.104736-1-boqun.feng@gmail.com/
> > 
> > Changes since v2:
> > 
> > *	Change from "RFC" to "PATCH".
> > 
> > *	Wording improvement in atomic_t.txt as per Alan's suggestion.
> > 
> > *	Add a new patch describing the usage of atomic_add_unless() is
> > 	not limited anymore for LKMM litmus tests.
> > 
> > My PR on supporting "(void) expr;" statement has been merged by Luc
> > (Thank you, Luc). So all the litmus tests in this patchset can be
> > handled by the herdtools compiled from latest master branch of the
> > source code.
> > 
> > Comments and suggestions are welcome!
> 
> A few nits (see inline), but otherwise the series looks good to me;
> with those fixed, please feel free to add:
> 
> Acked-by: Andrea Parri <parri.andrea@...il.com>
> 

Thank you and Alan! I will fix those in the next version.

Regards,
Boqun

> to the entire series.
> 
> Thanks,
>   Andrea
> 
> 
> > 
> > Regards,
> > Boqun
> > 
> > [1]: http://diy.inria.fr/doc/litmus.html#klitmus
> > 
> > Boqun Feng (5):
> >   tools/memory-model: Add an exception for limitations on _unless()
> >     family
> >   Documentation/locking/atomic: Fix atomic-set litmus test
> >   Documentation/locking/atomic: Introduce atomic-tests directory
> >   Documentation/locking/atomic: Add a litmus test for atomic_set()
> >   Documentation/locking/atomic: Add a litmus test smp_mb__after_atomic()
> > 
> >  ...ter_atomic-is-stronger-than-acquire.litmus | 32 +++++++++++++++++++
> >  ...c-RMW-ops-are-atomic-WRT-atomic_set.litmus | 24 ++++++++++++++
> >  Documentation/atomic-tests/README             | 16 ++++++++++
> >  Documentation/atomic_t.txt                    | 24 +++++++-------
> >  MAINTAINERS                                   |  1 +
> >  tools/memory-model/README                     | 10 ++++--
> >  6 files changed, 92 insertions(+), 15 deletions(-)
> >  create mode 100644 Documentation/atomic-tests/Atomic-RMW+mb__after_atomic-is-stronger-than-acquire.litmus
> >  create mode 100644 Documentation/atomic-tests/Atomic-RMW-ops-are-atomic-WRT-atomic_set.litmus
> >  create mode 100644 Documentation/atomic-tests/README
> > 
> > -- 
> > 2.25.0
> >