linux-kernel - Re: [PATCH 18/23] mm/hugetlb: Introduce huge version of special swap pte helpers

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Message-ID: <c7cce8a9-6095-d8a9-7980-9a369a0526e8@oracle.com>
Date:   Thu, 22 Apr 2021 12:00:59 -0700
From:   Mike Kravetz <mike.kravetz@...cle.com>
To:     Peter Xu <peterx@...hat.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Cc:     "Kirill A . Shutemov" <kirill@...temov.name>,
        Jerome Glisse <jglisse@...hat.com>,
        Matthew Wilcox <willy@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Hugh Dickins <hughd@...gle.com>,
        Nadav Amit <nadav.amit@...il.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>
Subject: Re: [PATCH 18/23] mm/hugetlb: Introduce huge version of special swap
 pte helpers

On 3/22/21 5:49 PM, Peter Xu wrote:
> This is to let hugetlbfs be prepared to also recognize swap special ptes just
> like uffd-wp special swap ptes.
> 
> Signed-off-by: Peter Xu <peterx@...hat.com>
> ---
>  mm/hugetlb.c | 23 +++++++++++++++++++++--
>  1 file changed, 21 insertions(+), 2 deletions(-)

The multiple uses of swap entries can be confusing.  Thanks for the
additional comments in the original userfaultfd wp code.

Reviewed-by: Mike Kravetz <mike.kravetz@...cle.com>
-- 
Mike Kravetz