On 14 Jul 2021, at 23:35, Matthew Wilcox (Oracle) wrote:

> Turn migrate_page_states() into a wrapper around folio_migrate_flags().
> Also convert two functions only called from folio_migrate_flags() to
> be folio-based.  ksm_migrate_page() becomes folio_migrate_ksm() and
> copy_page_owner() becomes folio_copy_owner().  folio_migrate_flags()
> alone shrinks by two thirds -- 1967 bytes down to 642 bytes.
>
> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
> ---
>  include/linux/ksm.h        |  4 +-
>  include/linux/migrate.h    |  1 +
>  include/linux/page_owner.h |  8 ++--
>  mm/folio-compat.c          |  6 +++
>  mm/ksm.c                   | 31 ++++++++------
>  mm/migrate.c               | 84 +++++++++++++++++++-------------------
>  mm/page_owner.c            | 10 ++---
>  7 files changed, 77 insertions(+), 67 deletions(-)

LGTM. Reviewed-by: Zi Yan <ziy@nvidia.com>

—
Best Regards,
Yan, Zi