diff options
| author | Wu Fengguang <fengguang.wu@intel.com> | 2009-12-16 12:19:59 +0100 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2009-12-16 12:19:59 +0100 |
| commit | d324236b3333e87c8825b35f2104184734020d35 (patch) | |
| tree | e8ad6b50e50f975b692cc6a15d5812a51d0047ad | |
| parent | e42d9d5d47961fb5db0be65b56dd52fe7b2421f1 (diff) | |
memcg: add accessor to mem_cgroup.css
So that an outside user can free the reference count grabbed by
try_get_mem_cgroup_from_page().
CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
CC: Hugh Dickins <hugh.dickins@tiscali.co.uk>
CC: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
CC: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
| -rw-r--r-- | include/linux/memcontrol.h | 7 | ||||
| -rw-r--r-- | mm/memcontrol.c | 5 |
2 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index fc9bae82ac42..2c30a1116d84 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -81,6 +81,8 @@ int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) return cgroup == mem; } +extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem); + extern int mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr); extern void mem_cgroup_end_migration(struct mem_cgroup *mem, @@ -206,6 +208,11 @@ static inline int task_in_mem_cgroup(struct task_struct *task, return 1; } +static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem) +{ + return NULL; +} + static inline int mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr) { diff --git a/mm/memcontrol.c b/mm/memcontrol.c index b5ac61ce7346..9eee80d6d490 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -282,6 +282,11 @@ mem_cgroup_zoneinfo(struct mem_cgroup *mem, int nid, int zid) return &mem->info.nodeinfo[nid]->zoneinfo[zid]; } +struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem) +{ + return &mem->css; +} + static struct mem_cgroup_per_zone * page_cgroup_zoneinfo(struct page_cgroup *pc) { |