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| author | Zach O'Keefe <zokeefe@google.com> | 2022-12-24 11:20:35 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-01-12 03:14:20 +0300 |
| commit | 3de0c269adc6c2fac0bb1fb11965f0de699dc32b (patch) | |
| tree | 715e57e0e6d29364cbe42d2fb8817bcff5e971a0 /include/linux/mm_inline.h | |
| parent | 52dc031088f00e323140ece4004e70c33153c6dd (diff) | |
| download | linux-3de0c269adc6c2fac0bb1fb11965f0de699dc32b.tar.xz | |
mm/shmem: restore SHMEM_HUGE_DENY precedence over MADV_COLLAPSE
SHMEM_HUGE_DENY is for emergency use by the admin, to disable allocation
of shmem huge pages if, for example, a dangerous bug is found in their
usage: see "deny" in Documentation/mm/transhuge.rst. An app using
madvise(,,MADV_COLLAPSE) should not be allowed to override it: restore its
precedence over shmem_huge_force.
Restore SHMEM_HUGE_DENY precedence over MADV_COLLAPSE.
Link: https://lkml.kernel.org/r/20221224082035.3197140-2-zokeefe@google.com
Fixes: 7c6c6cc4d3a2 ("mm/shmem: add flag to enforce shmem THP in hugepage_vma_check()")
Signed-off-by: Zach O'Keefe <zokeefe@google.com>
Suggested-by: Hugh Dickins <hughd@google.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/mm_inline.h')
0 files changed, 0 insertions, 0 deletions