On Mon Sep 21, 2026 at 6:40 AM EDT, Yeoreum Yun wrote:
check_huge_shmem() was required to distinguish shmem huge pages because
/proc/self/smaps reports them using a dedicated “ShmemPmdMapped” entry,
as opposed to “FilePmdMapped” for file-backed huge pages.
Now that /proc/self/smaps is no longer used to detect huge pages and
/proc/kpageflags is used instead, it is sufficient to distinguish
between file-backed and anonymous pages since the ShmemPmdMapped is also
kind of file-backed.
Therefore, remove check_huge_shmem() and use check_huge_file() instead
and cleanup khugepaged's check_huge operation in mem_ops.
Suggested-by: David Hildenbrand (Arm) <david@kernel.org>
Signed-off-by: Yeoreum Yun <redacted>
---
tools/testing/selftests/mm/folio_split_race_test.c | 2 +-
tools/testing/selftests/mm/khugepaged.c | 38 ++++------------------
tools/testing/selftests/mm/uffd-common.c | 4 +--
tools/testing/selftests/mm/vm_util.c | 5 ---
tools/testing/selftests/mm/vm_util.h | 1 -
5 files changed, 9 insertions(+), 41 deletions(-)
Makes sense.
Acked-by: Zi Yan <ziy@nvidia.com>
--
Best Regards,
Yan, Zi