The patchset adds khugepaged selftest (anon-THP only for now), expands cases khugepaged can handle and switches anon-THP copy-on-write handling to 4k. Please review and consider applying. Kirill A. Shutemov (7): khugepaged: Add self test khugepaged: Do not stop collapse if less than half PTEs are referenced khugepaged: Drain LRU add pagevec to get rid of extra pins khugepaged: Allow to callapse a page shared across fork khugepaged: Allow to collapse PTE-mapped compound pages thp: Change CoW semantics for anon-THP khugepaged: Introduce 'max_ptes_shared' tunable Documentation/admin-guide/mm/transhuge.rst | 7 + mm/huge_memory.c | 247 +----- mm/khugepaged.c | 124 ++- tools/testing/selftests/vm/Makefile | 1 + tools/testing/selftests/vm/khugepaged.c | 924 +++++++++++++++++++++ 5 files changed, 1057 insertions(+), 246 deletions(-) create mode 100644 tools/testing/selftests/vm/khugepaged.c -- 2.26.0
