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Date:   Tue, 30 Apr 2019 01:16:57 +0200
From:   Andrea Parri <>
To:     "Ruhl, Michael J" <>
Cc:     "" <>,
        "Dalessandro, Dennis" <>,
        "Marciniszyn, Mike" <>,
        Doug Ledford <>,
        Jason Gunthorpe <>,
        "" <>
Subject: Re: [PATCH 5/5] IB/hfi1: Fix improper uses of smp_mb__before_atomic()

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,


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