Commit 81e0f15f authored by Peter Xu's avatar Peter Xu Committed by Andrew Morton
Browse files

mm: enable PTE markers by default 

Enable PTE markers by default.  On x86_64 it means it'll auto-enable
PTE_MARKER_UFFD_WP as well.

[peterx@redhat.com: hide PTE_MARKER option]
  Link: https://lkml.kernel.org/r/20220419202531.27415-1-peterx@redhat.com
Link: https://lkml.kernel.org/r/20220405014929.15158-1-peterx@redhat.com


Signed-off-by: default avatarPeter Xu <peterx@redhat.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: "Kirill A . Shutemov" <kirill@shutemov.name>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent b1f9e876

mm/Kconfig

+5 −3
Original line number Diff line number Diff line
@@ -910,14 +910,16 @@ config ANON_VMA_NAME 
	  difference in their name.



config PTE_MARKER

	bool "Marker PTEs support"

	bool



	help

	  Allows to create marker PTEs for file-backed memory.



config PTE_MARKER_UFFD_WP

	bool "Marker PTEs support for userfaultfd write protection"

	depends on PTE_MARKER && HAVE_ARCH_USERFAULTFD_WP

	bool "Userfaultfd write protection support for shmem/hugetlbfs"

	default y

	depends on HAVE_ARCH_USERFAULTFD_WP

	select PTE_MARKER



	help

	  Allows to create marker PTEs for userfaultfd write protection