linux-kernel - Re: [PATCH] mm/uffd: Hide PTE

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Message-ID: <YmAnh/fgbPmTRUqj@cmpxchg.org>
Date:   Wed, 20 Apr 2022 11:32:23 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Peter Xu <peterx@...hat.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Alistair Popple <apopple@...dia.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Nadav Amit <nadav.amit@...il.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] mm/uffd: Hide PTE_MARKER option

On Tue, Apr 19, 2022 at 04:25:31PM -0400, Peter Xu wrote:
> The PTE_MARKER option should not need to be exposed to the kernel builder,
> keep it internal and remove the prompt so it won't be seen.
> 
> Instead, make the PTE_MARKER_UFFD_WP option to explicitly choose PTE_MARKER
> when necessary.
> 
> While PTE_MARKER_UFFD_WP will still prompt to user, change the wording so
> that it'll not mention PTE_MARKER at all but renaming it to "Userfaultfd
> write protection support for shmem/hugetlbfs".
> 
> Reported-by: Johannes Weiner <hannes@...xchg.org>
> Signed-off-by: Peter Xu <peterx@...hat.com>

Acked-by: Johannes Weiner <hannes@...xchg.org>

Thank you Peter