diff options
| author | Peter Xu <peterx@redhat.com> | 2022-10-30 17:41:50 -0400 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-11-30 15:58:45 -0800 |
| commit | ca92ea3dc5a2b01f98e9f02b7a6bc03be06fe124 (patch) | |
| tree | e3b6c8d5431d6da8e97c2c9c12e03d705edab873 /mm/Kconfig | |
| parent | f15be1b8d449a8eebe82d77164bf760804753651 (diff) | |
mm: always compile in pte markers
Patch series "mm: Use pte marker for swapin errors".
This series uses the pte marker to replace the swapin error swap entry,
then we save one more swap entry slot for swap devices. A new pte marker
bit is defined.
This patch (of 2):
The PTE markers code is tiny and now it's enabled for most of the
distributions. It's fine to keep it as-is, but to make a broader use of
it (e.g. replacing read error swap entry) it needs to be there always
otherwise we need special code path to take care of !PTE_MARKER case.
It'll be easier just make pte marker always exist. Use this chance to
extend its usage to anonymous too by simply touching up some of the old
comments, because it'll be used for anonymous pages in the follow up
patches.
Link: https://lkml.kernel.org/r/20221030214151.402274-1-peterx@redhat.com
Link: https://lkml.kernel.org/r/20221030214151.402274-2-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Huang Ying <ying.huang@intel.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index 57e1d8c5b505..4b28800d9be1 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -1107,17 +1107,10 @@ config HAVE_ARCH_USERFAULTFD_MINOR help Arch has userfaultfd minor fault support -config PTE_MARKER - bool - - help - Allows to create marker PTEs for file-backed memory. - config PTE_MARKER_UFFD_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 |