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Date:   Mon, 25 Jul 2022 15:29:49 -0700
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Ralph Campbell <rcampbell@nvidia.com>
Cc:     linux-mm@kvack.org, Felix Kuehling <felix.kuehling@amd.com>,
        Philip Yang <Philip.Yang@amd.com>,
        Alistair Popple <apopple@nvidia.com>,
        Jason Gunthorpe <jgg@nvidia.com>, stable@vger.kernel.org
Subject: Re: [PATCH] mm/hmm: fault non-owner device private entries
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        <e20f27ab-fb31-4301-0683-3ce51818b6b6@nvidia.com>
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On Mon, 25 Jul 2022 12:07:27 -0700 Ralph Campbell <rcampbell@nvidia.com> wrote:

> >> to fault in the page.
> > Could we please include here a description of the end-user visible
> > effects of the bug?
> >
> >> Cc: stable@vger.kernel.org
> > Especially when proposing a -stable backport.
> 
> If I add the following, would that be sufficient?
> Should I post a v3?
> 
> For example, if a page is migrated to GPU private
> memory and a RDMA fault capable NIC tries to read the migrated page,
> without this patch it will get an error. With this patch, the page will
> be migrated back to system memory and the NIC will be able to read the
> data.

I added it, thanks.