diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2012-07-31 16:42:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-31 18:42:41 -0700 |
| commit | 8e6ac7fab374816de9a8b0a8fbb02ef761a30ff4 (patch) | |
| tree | 94439bfcceb9e11af842da63f18f608aff4919c4 /include/linux/hugetlb_cgroup.h | |
| parent | abb8206cb07734d0b7bf033c715995d6371a94c3 (diff) | |
hugetlb/cgroup: migrate hugetlb cgroup info from oldpage to new page during migration
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 <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>
Cc: 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 'include/linux/hugetlb_cgroup.h')
| -rw-r--r-- | include/linux/hugetlb_cgroup.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/hugetlb_cgroup.h b/include/linux/hugetlb_cgroup.h index 73f1e600fc1..d73878c694b 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) @@ -114,5 +116,11 @@ 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 |