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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Tue, 1 Jun 2021 14:16:08 -1000
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Subject: Re: [PATCH 2/2] mm: adds NOSIGBUS extension for out-of-band shmem read
To:     Ming Lin <mlin@kernel.org>
Cc:     Hugh Dickins <hughd@google.com>, Simon Ser <contact@emersion.fr>,
        Linux-MM <linux-mm@kvack.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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This series passes my "looks fine, is simple and straightforward" test.

One nit:

On Tue, Jun 1, 2021 at 1:22 PM Ming Lin <mlin@kernel.org> wrote:
>
> +               error = vm_insert_page(vma, (unsigned long)vmf->address,
> +                                       ZERO_PAGE(0));

On architectures where this matters - bad virtual caches - it would be
better to use ZERO_PAGE(vmf->address).

It doesn't make a difference on any sane architecture, but it's the
RightThing(tm) to do.

            Linus