On 16 Nov 2020, at 11:25, Kirill A. Shutemov wrote: > On Wed, Nov 11, 2020 at 03:40:05PM -0500, Zi Yan wrote: >> From: Zi Yan >> >> It adds a new_order parameter to set new page order in page owner. >> It prepares for upcoming changes to support split huge page to any lower >> order. >> >> Signed-off-by: Zi Yan >> --- >> include/linux/page_owner.h | 7 ++++--- >> mm/huge_memory.c | 2 +- >> mm/page_alloc.c | 2 +- >> mm/page_owner.c | 6 +++--- >> 4 files changed, 9 insertions(+), 8 deletions(-) >> >> diff --git a/include/linux/page_owner.h b/include/linux/page_owner.h >> index 3468794f83d2..215cbb159568 100644 >> --- a/include/linux/page_owner.h >> +++ b/include/linux/page_owner.h >> @@ -31,10 +31,11 @@ static inline void set_page_owner(struct page *page, >> __set_page_owner(page, order, gfp_mask); >> } >> >> -static inline void split_page_owner(struct page *page, unsigned int nr) >> +static inline void split_page_owner(struct page *page, unsigned int nr, >> + unsigned int new_order) >> { >> if (static_branch_unlikely(&page_owner_inited)) >> - __split_page_owner(page, nr); >> + __split_page_owner(page, nr, new_order); > > Hm. Where do you correct __split_page_owner() declaration. I don't see it. I missed it. Will add it. Thanks. — Best Regards, Yan Zi