Hi, Shmem already supports mTHP allocation[1], and this patch set adds support for shmem mTHP collapse, as well as adding relevant test cases. Please help to review. Thanks. Note: all khugepaged selftests have passed. [1] https://lore.kernel.org/all/cover.1718090413.git.baolin.wang@xxxxxxxxxxxxxxxxx/T/#m4bd7e701c7b5f36f712055e4360cad593a22b3bf Changes from v1: - Simplify is_refcount_suitable(), per David. - Add reviewed tag from David. Thanks. - Update some comments. Baolin Wang (5): mm: khugepaged: expand the is_refcount_suitable() to support file folios mm: khugepaged: use the number of pages in the folio to check the reference count mm: khugepaged: support shmem mTHP copy mm: khugepaged: support shmem mTHP collapse selftests: mm: support shmem mTHP collapse testing mm/khugepaged.c | 62 +++++++++++------------ tools/testing/selftests/mm/khugepaged.c | 4 +- tools/testing/selftests/mm/thp_settings.c | 46 ++++++++++++++--- tools/testing/selftests/mm/thp_settings.h | 9 +++- 4 files changed, 82 insertions(+), 39 deletions(-) -- 2.39.3
