From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx107.postini.com [74.125.245.107]) by kanga.kvack.org (Postfix) with SMTP id EDC476B0080 for ; Sat, 9 Jun 2012 05:00:52 -0400 (EDT) Received: from /spool/local by e28smtp07.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Sat, 9 Jun 2012 14:30:50 +0530 Received: from d28av03.in.ibm.com (d28av03.in.ibm.com [9.184.220.65]) by d28relay02.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q5990lsx64684210 for ; Sat, 9 Jun 2012 14:30:47 +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 q59EU21w031287 for ; Sun, 10 Jun 2012 00:30:03 +1000 From: "Aneesh Kumar K.V" Subject: [PATCH -V8 15/16] hugetlb/cgroup: migrate hugetlb cgroup info from oldpage to new page during migration Date: Sat, 9 Jun 2012 14:30:00 +0530 Message-Id: <1339232401-14392-16-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" With HugeTLB pages, hugetlb cgroup is uncharged in compound page destructor. Since we are holding a hugepage reference, we can be sure that old page won't get uncharged till the last put_page(). Signed-off-by: Aneesh Kumar K.V --- include/linux/hugetlb_cgroup.h | 8 ++++++++ mm/hugetlb_cgroup.c | 21 +++++++++++++++++++++ mm/migrate.c | 5 +++++ 3 files changed, 34 insertions(+) diff --git a/include/linux/hugetlb_cgroup.h b/include/linux/hugetlb_cgroup.h index ba4836f..b64d067 100644 --- a/include/linux/hugetlb_cgroup.h +++ b/include/linux/hugetlb_cgroup.h @@ -63,6 +63,8 @@ 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); extern int hugetlb_cgroup_file_init(int idx) __init; +extern void hugetlb_cgroup_migrate(struct page *oldhpage, + struct page *newhpage); #else static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page) { @@ -112,5 +114,11 @@ static inline int __init hugetlb_cgroup_file_init(int idx) { return 0; } + +static inline void hugetlb_cgroup_migrate(struct page *oldhpage, + struct page *newhpage) +{ + return; +} #endif /* CONFIG_MEM_RES_CTLR_HUGETLB */ #endif diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c index c2b7b8e..2d384fe 100644 --- a/mm/hugetlb_cgroup.c +++ b/mm/hugetlb_cgroup.c @@ -394,6 +394,27 @@ int __init hugetlb_cgroup_file_init(int idx) return 0; } +void hugetlb_cgroup_migrate(struct page *oldhpage, struct page *newhpage) +{ + struct hugetlb_cgroup *h_cg; + + VM_BUG_ON(!PageHuge(oldhpage)); + + if (hugetlb_cgroup_disabled()) + return; + + spin_lock(&hugetlb_lock); + h_cg = hugetlb_cgroup_from_page(oldhpage); + set_hugetlb_cgroup(oldhpage, NULL); + cgroup_exclude_rmdir(&h_cg->css); + + /* move the h_cg details to new cgroup */ + set_hugetlb_cgroup(newhpage, h_cg); + spin_unlock(&hugetlb_lock); + cgroup_release_and_wakeup_rmdir(&h_cg->css); + return; +} + struct cgroup_subsys hugetlb_subsys = { .name = "hugetlb", .create = hugetlb_cgroup_create, diff --git a/mm/migrate.c b/mm/migrate.c index fdce3a2..6c37c51 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -33,6 +33,7 @@ #include #include #include +#include #include #include @@ -931,6 +932,10 @@ static int unmap_and_move_huge_page(new_page_t get_new_page, if (anon_vma) put_anon_vma(anon_vma); + + if (!rc) + hugetlb_cgroup_migrate(hpage, new_hpage); + unlock_page(hpage); out: put_page(new_hpage); -- 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