Hi, According to talk with Zi Yan [1], this patch set changes the return value of migrate_pages() to avoid returning a number which is larger than the number of pages the users tried to migrate by move_pages() syscall. Also fix the hugetlb migration stats and migration stats in trace_mm_compaction_migratepages(). Please help to review. Thanks. [1] https://lore.kernel.org/linux-mm/7E44019D-2A5D-4BA7-B4D5-00D4712F1687@xxxxxxxxxx/ Changes from RFC: - Increase nr_thp_failed when THP is split, no matter how many subpages are migrated successfully. - Add reviewed-by tags. Baolin Wang (3): mm: migrate: Fix the return value of migrate_pages() mm: migrate: Correct the hugetlb migration stats mm: compaction: Fix the migration stats in trace_mm_compaction_migratepages() include/trace/events/compaction.h | 24 +++----------- mm/compaction.c | 7 ++-- mm/migrate.c | 68 ++++++++++++++++++++++++++++----------- 3 files changed, 57 insertions(+), 42 deletions(-) -- 1.8.3.1
