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Date:   Thu, 9 May 2019 23:12:21 +0200
From:   Andrea Parri <andrea.parri@amarulasolutions.com>
To:     "Ruhl, Michael J" <michael.j.ruhl@intel.com>
Cc:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "Dalessandro, Dennis" <dennis.dalessandro@intel.com>,
        "Marciniszyn, Mike" <mike.marciniszyn@intel.com>,
        Doug Ledford <dledford@redhat.com>,
        Jason Gunthorpe <jgg@ziepe.ca>,
        "linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
        "Paul E. McKenney" <paulmck@linux.ibm.com>,
        Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH 5/5] IB/hfi1: Fix improper uses of smp_mb__before_atomic()
Message-ID: <20190509211221.GA4966@andrea>
References: <1556568902-12464-1-git-send-email-andrea.parri@amarulasolutions.com>
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 <14063C7AD467DE4B82DEDB5C278E8663BE6AADCE@FMSMSX108.amr.corp.intel.com>
 <20190429231657.GA2733@andrea>
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On Tue, Apr 30, 2019 at 01:16:57AM +0200, Andrea Parri wrote:
> Hi Mike,
> 
> > >This barrier only applies to the read-modify-write operations; in
> > >particular, it does not apply to the atomic_read() primitive.
> > >
> > >Replace the barrier with an smp_mb().
> > 
> > This is one of a couple of barrier issues that we are currently looking into.
> > 
> > See:
> > 
> > [PATCH for-next 6/9] IB/rdmavt: Add new completion inline
> > 
> > We will take a look at this one as well.
> 
> Thank you for the reference and for looking into this,

So, I'm planning to just drop this patch; or can I do something to help?

Please let me know.

Thanx,
  Andrea


> 
>   Andrea