[PATCH v2 0/8] mm: migrate: more folio conversion and unify

[Kefeng Wang <wangkefeng.wang@huawei.com>]

The patch 1~2	remove unexpected specific assert for PageTransHuge page.

The Patch 3~6	convert several more migration functions to use folio. 

The patch 7	remove PageHead() check to make hugetlb to migrate the
		entire hugetlb page instead of -EACCES errno return when
		passed the address of a tail page.

The patch 8	cleanup to unify and simplify code a bit in
		add_page_for_migration()

v2:
Thanks for all comments and advise from Matthew, Hugh, Zi, Mike, Huang.
- keep page_mapcount() check and remove specific assert for
  PageTransHuge page.
- separate patch7 to migrate the entire hugetlb page if a tail page passed,
  which unified the behavior between HUGETLB and THP when move_page().

Kefeng Wang (8):
  mm: migrate: remove PageTransHuge check in numamigrate_isolate_page()
  mm: migrate: remove THP mapcount check in numamigrate_isolate_page()
  mm: migrate: convert numamigrate_isolate_page() to
    numamigrate_isolate_folio()
  mm: migrate: use a folio in migrate_misplaced_page()
  mm: migrate: use __folio_test_movable()
  mm: migrate: use a folio in add_page_for_migration()
  mm: migrate: remove PageHead() check for HugeTLB in
    add_page_for_migration()
  mm: migrate: remove isolated variable in add_page_for_migration()

 mm/migrate.c | 110 +++++++++++++++++++++++----------------------------
 1 file changed, 49 insertions(+), 61 deletions(-)

-- 
2.41.0