From mboxrd@z Thu Jan 1 00:00:00 1970 From: TSUKADA Koutaro Subject: [PATCH v2 3/7] memcg: use compound_order rather than hpage_nr_pages Date: Fri, 18 May 2018 13:34:26 +0900 Message-ID: <262267fe-d98c-0b25-9013-3dafb52e8679@ascade.co.jp> References: Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" To: Johannes Weiner , Michal Hocko , Vladimir Davydov , Jonathan Corbet , "Luis R. Rodriguez" , Kees Cook Cc: Andrew Morton , Roman Gushchin , David Rientjes , Mike Kravetz , "Aneesh Kumar K.V" , Naoya Horiguchi , Anshuman Khandual , Marc-Andre Lureau , Punit Agrawal , Dan Williams , Vlastimil Babka , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, tsukada@ascade.co.jp The current memcg implementation assumes that the compound page is THP. In order to be able to charge surplus hugepage, we use compound_order. Signed-off-by: TSUKADA Koutaro --- memcontrol.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 2bd3df3..a8f1ff8 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -4483,7 +4483,7 @@ static int mem_cgroup_move_account(struct page *page, struct mem_cgroup *to) { unsigned long flags; - unsigned int nr_pages = compound ? hpage_nr_pages(page) : 1; + unsigned int nr_pages = compound ? (1 << compound_order(page)) : 1; int ret; bool anon; @@ -5417,7 +5417,7 @@ int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, bool compound) { struct mem_cgroup *memcg = NULL; - unsigned int nr_pages = compound ? hpage_nr_pages(page) : 1; + unsigned int nr_pages = compound ? (1 << compound_order(page)) : 1; int ret = 0; if (mem_cgroup_disabled()) @@ -5478,7 +5478,7 @@ int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, bool lrucare, bool compound) { - unsigned int nr_pages = compound ? hpage_nr_pages(page) : 1; + unsigned int nr_pages = compound ? (1 << compound_order(page)) : 1; VM_BUG_ON_PAGE(!page->mapping, page); VM_BUG_ON_PAGE(PageLRU(page) && !lrucare, page); @@ -5522,7 +5522,7 @@ void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, bool compound) { - unsigned int nr_pages = compound ? hpage_nr_pages(page) : 1; + unsigned int nr_pages = compound ? (1 << compound_order(page)) : 1; if (mem_cgroup_disabled()) return; @@ -5729,7 +5729,7 @@ void mem_cgroup_migrate(struct page *oldpage, struct page *newpage) /* Force-charge the new page. The old one will be freed soon */ compound = PageTransHuge(newpage); - nr_pages = compound ? hpage_nr_pages(newpage) : 1; + nr_pages = compound ? (1 << compound_order(newpage)) : 1; page_counter_charge(&memcg->memory, nr_pages); if (do_memsw_account()) -- Tsukada