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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2012-07-31 16:42:15 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-31 18:42:41 -0700
commit9dd540e23111d8884773ab942a736f3aba4040d4 (patch)
tree84c7dcfa97c43d1f09ad88cdc836ff1b99da76e4 /mm/hugetlb.c
parent2bc64a2046975410505bb119bba32705892b9255 (diff)
downloadlinux-9dd540e23111d8884773ab942a736f3aba4040d4.tar.bz2
hugetlb/cgroup: add the cgroup pointer to page lru
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 <aneesh.kumar@linux.vnet.ibm.com> Cc: David Rientjes <rientjes@google.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Hillf Danton <dhillf@gmail.com> Reviewed-by: Michal Hocko <mhocko@suse.cz> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
-rw-r--r--mm/hugetlb.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index d5971597736b..efe29b53daff 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -28,6 +28,7 @@
#include <linux/io.h>
#include <linux/hugetlb.h>
+#include <linux/hugetlb_cgroup.h>
#include <linux/node.h>
#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);
}
+ VM_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
*/