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Mon, 26 Feb 2024 15:56:13 -0500 (EST) From: Zi Yan To: "Pankaj Raghav (Samsung)" , linux-mm@kvack.org Cc: Zi Yan , "Matthew Wilcox (Oracle)" , David Hildenbrand , Yang Shi , Yu Zhao , "Kirill A . Shutemov" , Ryan Roberts , =?utf-8?q?Michal_Koutn=C3=BD?= , Roman Gushchin , "Zach O'Keefe" , Hugh Dickins , Luis Chamberlain , Andrew Morton , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v5 6/8] mm: page_owner: add support for splitting to any order in split page_owner. Date: Mon, 26 Feb 2024 15:55:32 -0500 Message-ID: <20240226205534.1603748-7-zi.yan@sent.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240226205534.1603748-1-zi.yan@sent.com> References: <20240226205534.1603748-1-zi.yan@sent.com> Reply-To: Zi Yan MIME-Version: 1.0 X-Stat-Signature: fr9qxki71641os48mwy6gypjcur51u5b X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: DAC101C0007 X-Rspam-User: X-HE-Tag: 1708980974-762690 X-HE-Meta: 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 69JP7n9b 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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 Acked-by: David Hildenbrand --- include/linux/page_owner.h | 13 ++++++++----- mm/huge_memory.c | 2 +- mm/page_alloc.c | 4 ++-- mm/page_owner.c | 7 +++---- 4 files changed, 14 insertions(+), 12 deletions(-) diff --git a/include/linux/page_owner.h b/include/linux/page_owner.h index 2b39c8e19d98..debdc25f08b9 100644 --- a/include/linux/page_owner.h +++ b/include/linux/page_owner.h @@ -11,7 +11,8 @@ 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, int order); +extern void __split_page_owner(struct page *page, int old_order, + int new_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 +32,11 @@ 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, int order) +static inline void split_page_owner(struct page *page, int old_order, + int new_order) { if (static_branch_unlikely(&page_owner_inited)) - __split_page_owner(page, order); + __split_page_owner(page, old_order, new_order); } static inline void folio_copy_owner(struct folio *newfolio, struct folio *old) { @@ -56,10 +58,11 @@ static inline void reset_page_owner(struct page *page, unsigned short order) { } static inline void set_page_owner(struct page *page, - unsigned int order, gfp_t gfp_mask) + unsigned short order, gfp_t gfp_mask) { } -static inline void split_page_owner(struct page *page, int order) +static inline void split_page_owner(struct page *page, int old_order, + int new_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 5d4b7c17b9bc..b2df788c11fa 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, order); + split_page_owner(head, order, 0); /* See comment in __split_huge_page_tail() */ if (PageAnon(head)) { diff --git a/mm/page_alloc.c b/mm/page_alloc.c index c31a468fe317..cc41341c08f4 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2652,7 +2652,7 @@ 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, order); + split_page_owner(page, order, 0); split_page_memcg(page, order, 0); } EXPORT_SYMBOL_GPL(split_page); @@ -4839,7 +4839,7 @@ 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, order); + split_page_owner(page, order, 0); split_page_memcg(page, order, 0); while (page < --last) set_page_refcounted(last); diff --git a/mm/page_owner.c b/mm/page_owner.c index b678f7a6e702..033e349f6479 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -306,19 +306,18 @@ void __set_page_owner_migrate_reason(struct page *page, int reason) page_ext_put(page_ext); } -void __split_page_owner(struct page *page, int order) +void __split_page_owner(struct page *page, int old_order, int new_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; - for (i = 0; i < nr; i++) { + for (i = 0; i < (1 << old_order); i++) { page_owner = get_page_owner(page_ext); - page_owner->order = 0; + page_owner->order = new_order; page_ext = page_ext_next(page_ext); } page_ext_put(page_ext);