linux-kernel - Re: Internal vs. external barriers (was: Re: Interesting LKMM litmus test)

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Message-ID: <Y8gYV81O80BtMvWm@rowland.harvard.edu>
Date:   Wed, 18 Jan 2023 11:03:35 -0500
From:   Alan Stern <stern@...land.harvard.edu>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     Andrea Parri <parri.andrea@...il.com>,
        Jonas Oberhauser <jonas.oberhauser@...wei.com>,
        Peter Zijlstra <peterz@...radead.org>, will <will@...nel.org>,
        "boqun.feng" <boqun.feng@...il.com>, npiggin <npiggin@...il.com>,
        dhowells <dhowells@...hat.com>,
        "j.alglave" <j.alglave@....ac.uk>,
        "luc.maranget" <luc.maranget@...ia.fr>, akiyks <akiyks@...il.com>,
        dlustig <dlustig@...dia.com>, joel <joel@...lfernandes.org>,
        urezki <urezki@...il.com>,
        quic_neeraju <quic_neeraju@...cinc.com>,
        frederic <frederic@...nel.org>,
        Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: Internal vs. external barriers (was: Re: Interesting LKMM litmus
 test)

On Tue, Jan 17, 2023 at 09:17:04PM -0800, Paul E. McKenney wrote:
> On Tue, Jan 17, 2023 at 09:15:15PM -0500, Alan Stern wrote:
> > Maybe we don't.  Please test the patch below; I think it will do what 
> > you want -- and it doesn't rule out nesting.
> 
> It works like a champ on manual/kernel/C-srcu*.litmus in the litmus
> repository on github, good show and thank you!!!
> 
> I will make more tests, and am checking this against the rest of the
> litmus tests in the repo, but in the meantime would you be willing to
> have me add your Signed-off-by?

I'll email a real patch submission in the not-too-distant future, 
assuming you don't find any problems with the new code.

Alan