linux-kernel - Re: [PATCH] locking/qspinlock: Fix inaccessible URL of MCS lock paper

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Message-ID: <20200107130939.GV2871@hirez.programming.kicks-ass.net>
Date:   Tue, 7 Jan 2020 14:09:39 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Ingo Molnar <mingo@...hat.com>, Will Deacon <will.deacon@....com>,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Konstantin Ryabitsev <konstantin@...uxfoundation.org>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH] locking/qspinlock: Fix inaccessible URL of MCS lock paper

On Tue, Jan 07, 2020 at 01:58:24PM +0100, Peter Zijlstra wrote:
> On Sun, Dec 22, 2019 at 09:25:32PM -0500, Waiman Long wrote:
> > It turns out that the URL of the MCS lock paper listed in the source
> > code is no longer accessible. I did got question about where the paper
> > was. This patch updates the URL to one that is still accessible.
> > 
> > Signed-off-by: Waiman Long <longman@...hat.com>
> > ---
> >  kernel/locking/qspinlock.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c
> > index 2473f10c6956..1d008d2333c0 100644
> > --- a/kernel/locking/qspinlock.c
> > +++ b/kernel/locking/qspinlock.c
> > @@ -34,7 +34,7 @@
> >   * MCS lock. The paper below provides a good description for this kind
> >   * of lock.
> >   *
> > - * http://www.cise.ufl.edu/tr/DOC/REP-1992-71.pdf
> > + * https://www.cs.rochester.edu/u/scott/papers/1991_TOCS_synch.pdf
> 
> Do we want to stick a copy of the paper in our bugzilla and link that
> instead? ISTR we do something similar elsewhere, but I'm having trouble
> finding it.
> 
> Thomas, Konstantin?

Boris provided an example from commit:

  018ebca8bd70 ("x86/cpufeatures: Enable a new AVX512 CPU feature")

That puts a copy of the relevant Intel document here:

  https://bugzilla.kernel.org/show_bug.cgi?id=204215