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Mon, 26 Feb 2024 15:56:10 -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 3/8] mm/memcg: use order instead of nr in split_page_memcg() Date: Mon, 26 Feb 2024 15:55:29 -0500 Message-ID: <20240226205534.1603748-4-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: gw3fybai3nup7xxb7atjug877kk3subo X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 58A4080010 X-Rspam-User: X-HE-Tag: 1708980972-884357 X-HE-Meta: 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 F2ryZW0l ZxgW0vEu+aVYoySuVvGgbH85emBPQ4f49/ermrJao+Vd65fZLVgSZMMlpUqAik2Tqq//dvKizJcQgHsAJB+L2BV9FqtCceOBe7pIW9qYQl8djwDV+KyWHB/JS+XOpPlDxzVK7cg7ZZPPxIdTSk8XTeEUIxg== 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 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. Signed-off-by: Zi Yan Acked-by: David Hildenbrand --- include/linux/memcontrol.h | 4 ++-- mm/huge_memory.c | 5 +++-- mm/memcontrol.c | 3 ++- mm/page_alloc.c | 4 ++-- 4 files changed, 9 insertions(+), 7 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 4e4caeaea404..173bbb53c1ec 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -1163,7 +1163,7 @@ static inline void memcg_memory_event_mm(struct mm_struct *mm, rcu_read_unlock(); } -void split_page_memcg(struct page *head, unsigned int nr); +void split_page_memcg(struct page *head, int order); unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, gfp_t gfp_mask, @@ -1621,7 +1621,7 @@ void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) { } -static inline void split_page_memcg(struct page *head, unsigned int nr) +static inline void split_page_memcg(struct page *head, int order) { } diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 9840f312c08f..96ac7c62c375 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2889,11 +2889,12 @@ static void __split_huge_page(struct page *page, struct list_head *list, struct lruvec *lruvec; struct address_space *swap_cache = NULL; unsigned long offset = 0; - unsigned int nr = thp_nr_pages(head); int i, nr_dropped = 0; + int order = folio_order(folio); + unsigned int nr = 1 << order; /* complete memcg works before add pages to LRU */ - split_page_memcg(head, nr); + split_page_memcg(head, order); if (folio_test_anon(folio) && folio_test_swapcache(folio)) { offset = swp_offset(folio->swap); diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 95c3fccb321b..1a09f0e77c44 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3608,11 +3608,12 @@ void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size) /* * Because page_memcg(head) is not set on tails, set it now. */ -void split_page_memcg(struct page *head, unsigned int nr) +void split_page_memcg(struct page *head, int order) { struct folio *folio = page_folio(head); struct mem_cgroup *memcg = folio_memcg(folio); int i; + unsigned int nr = 1 << order; if (mem_cgroup_disabled() || !memcg) return; diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 96839b210abe..a7a96bc97e0b 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2653,7 +2653,7 @@ 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_memcg(page, 1 << order); + split_page_memcg(page, order); } EXPORT_SYMBOL_GPL(split_page); @@ -4840,7 +4840,7 @@ static void *make_alloc_exact(unsigned long addr, unsigned int order, struct page *last = page + nr; split_page_owner(page, 1 << order); - split_page_memcg(page, 1 << order); + split_page_memcg(page, order); while (page < --last) set_page_refcounted(last);