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authorZach O'Keefe <[email protected]>2022-12-24 00:20:35 -0800
committerAndrew Morton <[email protected]>2023-01-11 16:14:20 -0800
commit3de0c269adc6c2fac0bb1fb11965f0de699dc32b (patch)
tree715e57e0e6d29364cbe42d2fb8817bcff5e971a0 /tools/perf/scripts/python/bin/export-to-postgresql-report
parent52dc031088f00e323140ece4004e70c33153c6dd (diff)
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/[email protected] Fixes: 7c6c6cc4d3a2 ("mm/shmem: add flag to enforce shmem THP in hugepage_vma_check()") Signed-off-by: Zach O'Keefe <[email protected]> Suggested-by: Hugh Dickins <[email protected]> Acked-by: David Hildenbrand <[email protected]> Cc: Yang Shi <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
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