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From:   Peter Xu <peterx@redhat.com>
To:     linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc:     Axel Rasmussen <axelrasmussen@google.com>,
        Andrew Morton <akpm@linux-foundation.org>, peterx@redhat.com,
        Mike Kravetz <mike.kravetz@oracle.com>,
        Mike Rapoport <rppt@linux.vnet.ibm.com>,
        "Kirill A . Shutemov" <kirill@shutemov.name>,
        Matthew Wilcox <willy@infradead.org>,
        Andrea Arcangeli <aarcange@redhat.com>
Subject: [PATCH v3 0/4] hugetlb: Disable huge pmd unshare for uffd-wp
Date:   Thu, 18 Feb 2021 16:54:30 -0500
Message-Id: <20210218215434.10203-1-peterx@redhat.com>
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v3:=0D
- patch 4:=0D
  - fix build failure for !CMA and/or !HUGETLBFS [Axel]=0D
  - Fix mmu notifier range to use start/end [Mike]=0D
- add more r-bs=0D
=0D
v2:=0D
- patch 4: move hugetlb_unshare_all_pmds() into mm/hugetlb.c, so it can be =
used=0D
  even outside userfaultfd.c=0D
=0D
This series tries to disable huge pmd unshare of hugetlbfs backed memory fo=
r=0D
uffd-wp.  Although uffd-wp of hugetlbfs is still during rfc stage, the idea=
 of=0D
this series may be needed for multiple tasks (Axel's uffd minor fault serie=
s,=0D
and Mike's soft dirty series), so I picked it out from the larger series.=0D
=0D
References works:=0D
=0D
Uffd shmem+hugetlbfs rfc:=0D
https://lore.kernel.org/lkml/20210115170907.24498-1-peterx@redhat.com/=0D
=0D
Uffd minor mode for hugetlbfs:=0D
https://lore.kernel.org/lkml/20210212215403.3457686-1-axelrasmussen@google.=
com/=0D
=0D
Soft dirty for hugetlbfs:=0D
https://lore.kernel.org/lkml/20210211000322.159437-1-mike.kravetz@oracle.co=
m/=0D
=0D
Please review, thanks.=0D
=0D
Peter Xu (4):=0D
  hugetlb: Pass vma into huge_pte_alloc() and huge_pmd_share()=0D
  hugetlb/userfaultfd: Forbid huge pmd sharing when uffd enabled=0D
  mm/hugetlb: Move flush_hugetlb_tlb_range() into hugetlb.h=0D
  hugetlb/userfaultfd: Unshare all pmds for hugetlbfs when register wp=0D
=0D
 arch/arm64/mm/hugetlbpage.c   |  7 ++-=0D
 arch/ia64/mm/hugetlbpage.c    |  3 +-=0D
 arch/mips/mm/hugetlbpage.c    |  4 +-=0D
 arch/parisc/mm/hugetlbpage.c  |  2 +-=0D
 arch/powerpc/mm/hugetlbpage.c |  3 +-=0D
 arch/s390/mm/hugetlbpage.c    |  2 +-=0D
 arch/sh/mm/hugetlbpage.c      |  2 +-=0D
 arch/sparc/mm/hugetlbpage.c   |  1 +=0D
 fs/userfaultfd.c              |  4 ++=0D
 include/linux/hugetlb.h       | 18 ++++++-=0D
 include/linux/userfaultfd_k.h |  9 ++++=0D
 mm/hugetlb.c                  | 94 +++++++++++++++++++++++++++--------=0D
 mm/userfaultfd.c              |  2 +-=0D
 13 files changed, 116 insertions(+), 35 deletions(-)=0D
=0D
-- =0D
2.26.2=0D
=0D