Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756521Ab2E3OmZ (ORCPT ); Wed, 30 May 2012 10:42:25 -0400 Received: from e28smtp05.in.ibm.com ([122.248.162.5]:41809 "EHLO e28smtp05.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755460Ab2E3Ojw (ORCPT ); Wed, 30 May 2012 10:39:52 -0400 From: "Aneesh Kumar K.V" 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" , Andrea Arcangeli Subject: [PATCH -V7 08/14] hugetlbfs: add a list for tracking in-use HugeTLB pages Date: Wed, 30 May 2012 20:08:53 +0530 Message-Id: <1338388739-22919-9-git-send-email-aneesh.kumar@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.10 In-Reply-To: <1338388739-22919-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> References: <1338388739-22919-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> x-cbid: 12053014-8256-0000-0000-000002BBDF1B Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4188 Lines: 113 From: "Aneesh Kumar K.V" hugepage_activelist will be used to track currently used HugeTLB pages. We need to find the in-use HugeTLB pages to support memcg removal. On memcg removal we update the page's memory cgroup to point to parent cgroup. Signed-off-by: Aneesh Kumar K.V Reviewed-by: KAMEZAWA Hiroyuki Cc: Hillf Danton Cc: Michal Hocko Cc: Andrea Arcangeli Cc: Johannes Weiner --- include/linux/hugetlb.h | 1 + mm/hugetlb.c | 12 +++++++----- 2 files changed, 8 insertions(+), 5 deletions(-) diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index c21e136..c4353ea 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -211,6 +211,7 @@ struct hstate { unsigned long resv_huge_pages; unsigned long surplus_huge_pages; unsigned long nr_overcommit_huge_pages; + struct list_head hugepage_activelist; struct list_head hugepage_freelists[MAX_NUMNODES]; unsigned int nr_huge_pages_node[MAX_NUMNODES]; unsigned int free_huge_pages_node[MAX_NUMNODES]; diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 704a269..0f38728 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -510,7 +510,7 @@ void copy_huge_page(struct page *dst, struct page *src) static void enqueue_huge_page(struct hstate *h, struct page *page) { int nid = page_to_nid(page); - list_add(&page->lru, &h->hugepage_freelists[nid]); + list_move(&page->lru, &h->hugepage_freelists[nid]); h->free_huge_pages++; h->free_huge_pages_node[nid]++; } @@ -522,7 +522,7 @@ static struct page *dequeue_huge_page_node(struct hstate *h, int nid) if (list_empty(&h->hugepage_freelists[nid])) return NULL; page = list_entry(h->hugepage_freelists[nid].next, struct page, lru); - list_del(&page->lru); + list_move(&page->lru, &h->hugepage_activelist); set_page_refcounted(page); h->free_huge_pages--; h->free_huge_pages_node[nid]--; @@ -626,10 +626,11 @@ static void free_huge_page(struct page *page) page->mapping = NULL; BUG_ON(page_count(page)); BUG_ON(page_mapcount(page)); - INIT_LIST_HEAD(&page->lru); spin_lock(&hugetlb_lock); if (h->surplus_huge_pages_node[nid] && huge_page_order(h) < MAX_ORDER) { + /* remove the page from active list */ + list_del(&page->lru); update_and_free_page(h, page); h->surplus_huge_pages--; h->surplus_huge_pages_node[nid]--; @@ -642,6 +643,7 @@ static void free_huge_page(struct page *page) 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); h->nr_huge_pages++; @@ -890,6 +892,7 @@ static struct page *alloc_buddy_huge_page(struct hstate *h, int nid) spin_lock(&hugetlb_lock); if (page) { + INIT_LIST_HEAD(&page->lru); r_nid = page_to_nid(page); set_compound_page_dtor(page, free_huge_page); /* @@ -994,7 +997,6 @@ retry: list_for_each_entry_safe(page, tmp, &surplus_list, lru) { if ((--needed) < 0) break; - list_del(&page->lru); /* * This page is now managed by the hugetlb allocator and has * no users -- drop the buddy allocator's reference. @@ -1009,7 +1011,6 @@ free: /* Free unnecessary surplus pages to the buddy allocator */ if (!list_empty(&surplus_list)) { list_for_each_entry_safe(page, tmp, &surplus_list, lru) { - list_del(&page->lru); put_page(page); } } @@ -1909,6 +1910,7 @@ void __init hugetlb_add_hstate(unsigned order) h->free_huge_pages = 0; for (i = 0; i < MAX_NUMNODES; ++i) INIT_LIST_HEAD(&h->hugepage_freelists[i]); + INIT_LIST_HEAD(&h->hugepage_activelist); h->next_nid_to_alloc = first_node(node_states[N_HIGH_MEMORY]); h->next_nid_to_free = first_node(node_states[N_HIGH_MEMORY]); snprintf(h->name, HSTATE_NAME_LEN, "hugepages-%lukB", -- 1.7.10 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/