From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx137.postini.com [74.125.245.137]) by kanga.kvack.org (Postfix) with SMTP id 688146B0078 for ; Sat, 9 Jun 2012 05:00:52 -0400 (EDT) Received: from /spool/local by e28smtp09.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Sat, 9 Jun 2012 14:30:49 +0530 Received: from d28av03.in.ibm.com (d28av03.in.ibm.com [9.184.220.65]) by d28relay01.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q5990ZnR67043368 for ; Sat, 9 Jun 2012 14:30:35 +0530 Received: from d28av03.in.ibm.com (loopback [127.0.0.1]) by d28av03.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q59ETpMX030123 for ; Sun, 10 Jun 2012 00:29:51 +1000 From: "Aneesh Kumar K.V" Subject: [PATCH -V8 10/16] hugetlb/cgroup: Add the cgroup pointer to page lru Date: Sat, 9 Jun 2012 14:29:55 +0530 Message-Id: <1339232401-14392-11-git-send-email-aneesh.kumar@linux.vnet.ibm.com> In-Reply-To: <1339232401-14392-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> References: <1339232401-14392-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org, kamezawa.hiroyu@jp.fujitsu.com, dhillf@gmail.com, rientjes@google.com, mhocko@suse.cz, akpm@linux-foundation.org, hannes@cmpxchg.org Cc: linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, "Aneesh Kumar K.V" From: "Aneesh Kumar K.V" Add the hugetlb cgroup pointer to 3rd page lru.next. This limit the usage to hugetlb cgroup to only hugepages with 3 or more normal pages. I guess that is an acceptable limitation. Signed-off-by: Aneesh Kumar K.V --- include/linux/hugetlb_cgroup.h | 31 +++++++++++++++++++++++++++++++ mm/hugetlb.c | 4 ++++ 2 files changed, 35 insertions(+) diff --git a/include/linux/hugetlb_cgroup.h b/include/linux/hugetlb_cgroup.h index 5794be4..ceff1d5 100644 --- a/include/linux/hugetlb_cgroup.h +++ b/include/linux/hugetlb_cgroup.h @@ -26,6 +26,26 @@ struct hugetlb_cgroup { }; #ifdef CONFIG_CGROUP_HUGETLB_RES_CTLR +static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page) +{ + if (!PageHuge(page)) + return NULL; + if (compound_order(page) < 3) + return NULL; + return (struct hugetlb_cgroup *)page[2].lru.next; +} + +static inline +int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg) +{ + if (!PageHuge(page)) + return -1; + if (compound_order(page) < 3) + return -1; + page[2].lru.next = (void *)h_cg; + return 0; +} + static inline bool hugetlb_cgroup_disabled(void) { if (hugetlb_subsys.disabled) @@ -43,6 +63,17 @@ extern void hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages, extern void hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages, struct hugetlb_cgroup *h_cg); #else +static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page) +{ + return NULL; +} + +static inline +int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg) +{ + return 0; +} + static inline bool hugetlb_cgroup_disabled(void) { return true; diff --git a/mm/hugetlb.c b/mm/hugetlb.c index e899a2d..1ca2d8f 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -28,6 +28,7 @@ #include #include +#include #include #include "internal.h" @@ -591,6 +592,7 @@ static void update_and_free_page(struct hstate *h, struct page *page) 1 << PG_active | 1 << PG_reserved | 1 << PG_private | 1 << PG_writeback); } + BUG_ON(hugetlb_cgroup_from_page(page)); set_compound_page_dtor(page, NULL); set_page_refcounted(page); arch_release_hugepage(page); @@ -643,6 +645,7 @@ static void prep_new_huge_page(struct hstate *h, struct page *page, int nid) INIT_LIST_HEAD(&page->lru); set_compound_page_dtor(page, free_huge_page); spin_lock(&hugetlb_lock); + set_hugetlb_cgroup(page, NULL); h->nr_huge_pages++; h->nr_huge_pages_node[nid]++; spin_unlock(&hugetlb_lock); @@ -892,6 +895,7 @@ static struct page *alloc_buddy_huge_page(struct hstate *h, int nid) INIT_LIST_HEAD(&page->lru); r_nid = page_to_nid(page); set_compound_page_dtor(page, free_huge_page); + set_hugetlb_cgroup(page, NULL); /* * We incremented the global counters already */ -- 1.7.10 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org