Re: [PATCH mm-unstable] mm/khugepaged: fix collapse_pte_mapped_thp() versus uffd

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To: Hugh Dickins <hughd@xxxxxxxxxx>
Subject: Re: [PATCH mm-unstable] mm/khugepaged: fix collapse_pte_mapped_thp() versus uffd
From: Jann Horn <jannh@xxxxxxxxxx>
Date: Tue, 22 Aug 2023 21:07:15 +0200
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Mike Kravetz <mike.kravetz@xxxxxxxxxx>, Mike Rapoport <rppt@xxxxxxxxxx>, "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, Suren Baghdasaryan <surenb@xxxxxxxxxx>, Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>, Yang Shi <shy828301@xxxxxxxxx>, Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>, Peter Xu <peterx@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Yu Zhao <yuzhao@xxxxxxxxxx>, Alistair Popple <apopple@xxxxxxxxxx>, Ralph Campbell <rcampbell@xxxxxxxxxx>, Ira Weiny <ira.weiny@xxxxxxxxx>, Steven Price <steven.price@xxxxxxx>, SeongJae Park <sj@xxxxxxxxxx>, Lorenzo Stoakes <lstoakes@xxxxxxxxx>, Huang Ying <ying.huang@xxxxxxxxx>, Naoya Horiguchi <naoya.horiguchi@xxxxxxx>, Christophe Leroy <christophe.leroy@xxxxxxxxxx>, Zack Rusin <zackr@xxxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxx>, Axel Rasmussen <axelrasmussen@xxxxxxxxxx>, Anshuman Khandual <anshuman.khandual@xxxxxxx>, Pasha Tatashin <pasha.tatashin@xxxxxxxxxx>, Miaohe Lin <linmiaohe@xxxxxxxxxx>, Minchan Kim <minchan@xxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Song Liu <song@xxxxxxxxxx>, Thomas Hellstrom <thomas.hellstrom@xxxxxxxxxxxxxxx>, Russell King <linux@xxxxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>, Heiko Carstens <hca@xxxxxxxxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>, Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>, Alexander Gordeev <agordeev@xxxxxxxxxxxxx>, Gerald Schaefer <gerald.schaefer@xxxxxxxxxxxxx>, Vasily Gorbik <gor@xxxxxxxxxxxxx>, Vishal Moola <vishal.moola@xxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Zi Yan <ziy@xxxxxxxxxx>, "Zach O'Keefe" <zokeefe@xxxxxxxxxx>, Linux ARM <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>, sparclinux@xxxxxxxxxxxxxxx, linuxppc-dev <linuxppc-dev@xxxxxxxxxxxxxxxx>, linux-s390 <linux-s390@xxxxxxxxxxxxxxx>, kernel list <linux-kernel@xxxxxxxxxxxxxxx>, Linux-MM <linux-mm@xxxxxxxxx>
In-reply-to: <82d294-c9b0-d7b4-71c9-cfed3925c47b@google.com>
References: <4d31abf5-56c0-9f3d-d12f-c9317936691@google.com> <CAG48ez1XAePj5MUG8AUmnTjRLcxKre-NGYV82kB68-X8Rh6fxA@mail.gmail.com> <f2dc6d6b-c516-932-1598-a58e2afffe9a@google.com> <CAG48ez0S-RjAapaDiJ+oZXpn1vs9niWx54iqzusUScS-BYu0hw@mail.gmail.com> <82d294-c9b0-d7b4-71c9-cfed3925c47b@google.com>

On Tue, Aug 22, 2023 at 8:54 PM Hugh Dickins <hughd@xxxxxxxxxx> wrote:
> But rather than reworking it, please let's just go with v1 for now.

Sounds good to me.

References:
- [PATCH mm-unstable] mm/khugepaged: fix collapse_pte_mapped_thp() versus uffd
  - From: Hugh Dickins
- Re: [PATCH mm-unstable] mm/khugepaged: fix collapse_pte_mapped_thp() versus uffd
  - From: Jann Horn
- Re: [PATCH mm-unstable] mm/khugepaged: fix collapse_pte_mapped_thp() versus uffd
  - From: Hugh Dickins
- Re: [PATCH mm-unstable] mm/khugepaged: fix collapse_pte_mapped_thp() versus uffd
  - From: Jann Horn
- Re: [PATCH mm-unstable] mm/khugepaged: fix collapse_pte_mapped_thp() versus uffd
  - From: Hugh Dickins

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