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Shutemov" Cc: Roman Gushchin , Andrew Morton , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Yang Shi , Michal Hocko , John Hubbard , Ralph Campbell , David Nellans , Zi Yan Subject: [PATCH 3/7] mm: memcg: make memcg huge page split support any order split. Date: Thu, 19 Nov 2020 11:06:01 -0500 Message-Id: <20201119160605.1272425-4-zi.yan@sent.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201119160605.1272425-1-zi.yan@sent.com> References: <20201119160605.1272425-1-zi.yan@sent.com> Reply-To: Zi Yan MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: From: Zi Yan It sets memcg information for the pages after the split. A new parameter new_order is added to tell the new page order, always 0 for now. It prepares for upcoming changes to support split huge page to any lower order. Signed-off-by: Zi Yan Reviewed-by: Ralph Campbell Acked-by: Roman Gushchin --- include/linux/memcontrol.h | 5 +++-- mm/huge_memory.c | 2 +- mm/memcontrol.c | 6 +++--- 3 files changed, 7 insertions(+), 6 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index a8d5daf95988..39707feae505 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -1062,7 +1062,7 @@ static inline void memcg_memory_event_mm(struct mm_st= ruct *mm, } =20 #ifdef CONFIG_TRANSPARENT_HUGEPAGE -void mem_cgroup_split_huge_fixup(struct page *head); +void mem_cgroup_split_huge_fixup(struct page *head, unsigned int new_order= ); #endif =20 #else /* CONFIG_MEMCG */ @@ -1396,7 +1396,8 @@ unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t= *pgdat, int order, return 0; } =20 -static inline void mem_cgroup_split_huge_fixup(struct page *head) +static inline void mem_cgroup_split_huge_fixup(struct page *head, + unsigned int new_order) { } =20 diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 88d8b7fce5d7..d7ab5cac5851 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2428,7 +2428,7 @@ static void __split_huge_page(struct page *page, stru= ct list_head *list, lruvec =3D mem_cgroup_page_lruvec(head, pgdat); =20 /* complete memcg works before add pages to LRU */ - mem_cgroup_split_huge_fixup(head); + mem_cgroup_split_huge_fixup(head, 0); =20 if (PageAnon(head) && PageSwapCache(head)) { swp_entry_t entry =3D { .val =3D page_private(head) }; diff --git a/mm/memcontrol.c b/mm/memcontrol.c index de5869dd354d..4521ed3a51b7 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3223,15 +3223,15 @@ void obj_cgroup_uncharge(struct obj_cgroup *objcg, = size_t size) * Because tail pages are not marked as "used", set it. We're under * pgdat->lru_lock and migration entries setup in all page mappings. */ -void mem_cgroup_split_huge_fixup(struct page *head) +void mem_cgroup_split_huge_fixup(struct page *head, unsigned int new_order) { struct mem_cgroup *memcg =3D page_memcg(head); - int i; + int i, new_nr =3D 1 << new_order; =20 if (mem_cgroup_disabled()) return; =20 - for (i =3D 1; i < thp_nr_pages(head); i++) { + for (i =3D new_nr; i < thp_nr_pages(head); i +=3D new_nr) { css_get(&memcg->css); head[i].memcg_data =3D (unsigned long)memcg; } --=20 2.28.0