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hugetlb/cgroup: add the cgroup pointer to page lru

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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>
This commit is contained in:
Aneesh Kumar K.V
2012-07-31 16:42:15 -07:00
committed by Linus Torvalds
parent 2bc64a2046
commit 9dd540e231
2 changed files with 41 additions and 0 deletions
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4
mm/hugetlb.c
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@@ -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
*/