From 9a581c12cddb06696fe4811239934fcde57ceb91 Mon Sep 17 00:00:00 2001 From: Zi Yan Date: Mon, 26 Feb 2024 15:55:30 -0500 Subject: [PATCH] mm/page_owner: use order instead of nr in split_page_owner() We do not have non power of two pages, using nr is error prone if nr is not power-of-two. Use page order instead. Link: https://lkml.kernel.org/r/20240226205534.1603748-5-zi.yan@sent.com Signed-off-by: Zi Yan Acked-by: David Hildenbrand Cc: Hugh Dickins Cc: Kirill A. Shutemov Cc: Luis Chamberlain Cc: "Matthew Wilcox (Oracle)" Cc: Michal Koutny Cc: Roman Gushchin Cc: Ryan Roberts Cc: Yang Shi Cc: Yu Zhao Cc: Zach O'Keefe Signed-off-by: Andrew Morton --- include/linux/page_owner.h | 9 ++++----- mm/huge_memory.c | 2 +- mm/page_alloc.c | 4 ++-- mm/page_owner.c | 3 ++- 4 files changed, 9 insertions(+), 9 deletions(-) diff --git a/include/linux/page_owner.h b/include/linux/page_owner.h index 119a0c9d2a8b..2b39c8e19d98 100644 --- a/include/linux/page_owner.h +++ b/include/linux/page_owner.h @@ -11,7 +11,7 @@ extern struct page_ext_operations page_owner_ops; extern void __reset_page_owner(struct page *page, unsigned short order); extern void __set_page_owner(struct page *page, unsigned short order, gfp_t gfp_mask); -extern void __split_page_owner(struct page *page, unsigned int nr); +extern void __split_page_owner(struct page *page, int order); extern void __folio_copy_owner(struct folio *newfolio, struct folio *old); extern void __set_page_owner_migrate_reason(struct page *page, int reason); extern void __dump_page_owner(const struct page *page); @@ -31,10 +31,10 @@ 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, int order) { if (static_branch_unlikely(&page_owner_inited)) - __split_page_owner(page, nr); + __split_page_owner(page, order); } static inline void folio_copy_owner(struct folio *newfolio, struct folio *old) { @@ -59,8 +59,7 @@ static inline void set_page_owner(struct page *page, unsigned int order, gfp_t gfp_mask) { } -static inline void split_page_owner(struct page *page, - unsigned short order) +static inline void split_page_owner(struct page *page, int order) { } static inline void folio_copy_owner(struct folio *newfolio, struct folio *folio) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 96ac7c62c375..2b95dbc95fae 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2933,7 +2933,7 @@ static void __split_huge_page(struct page *page, struct list_head *list, unlock_page_lruvec(lruvec); /* Caller disabled irqs, so they are still disabled here */ - split_page_owner(head, nr); + split_page_owner(head, order); /* See comment in __split_huge_page_tail() */ if (PageAnon(head)) { diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 44ffe1304878..a9d1af34f4d6 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2616,7 +2616,7 @@ void split_page(struct page *page, unsigned int order) for (i = 1; i < (1 << order); i++) set_page_refcounted(page + i); - split_page_owner(page, 1 << order); + split_page_owner(page, order); split_page_memcg(page, order); } EXPORT_SYMBOL_GPL(split_page); @@ -4801,7 +4801,7 @@ static void *make_alloc_exact(unsigned long addr, unsigned int order, struct page *page = virt_to_page((void *)addr); struct page *last = page + nr; - split_page_owner(page, 1 << order); + split_page_owner(page, order); split_page_memcg(page, order); while (page < --last) set_page_refcounted(last); diff --git a/mm/page_owner.c b/mm/page_owner.c index e56c1e92eccf..b678f7a6e702 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -306,11 +306,12 @@ void __set_page_owner_migrate_reason(struct page *page, int reason) page_ext_put(page_ext); } -void __split_page_owner(struct page *page, unsigned int nr) +void __split_page_owner(struct page *page, int order) { int i; struct page_ext *page_ext = page_ext_get(page); struct page_owner *page_owner; + unsigned int nr = 1 << order; if (unlikely(!page_ext)) return;