aboutsummaryrefslogtreecommitdiffstats
path: root/mm/hugetlb_cgroup.c
diff options
context:
space:
mode:
authorTejun Heo <tj@kernel.org>2013-08-08 20:11:22 -0400
committerTejun Heo <tj@kernel.org>2013-08-08 20:11:22 -0400
commit3f79851831a135c5cebbcaa8cddb07d02870b069 (patch)
treeafe7ebf14a4ffecc5bb053d6c0c1474155b598e1 /mm/hugetlb_cgroup.c
parent6d37b97428d20a21ffc39ba90e97e91e2a79a986 (diff)
hugetlb_cgroup: pass around @hugetlb_cgroup instead of @cgroup
cgroup controller API will be converted to primarily use struct cgroup_subsys_state instead of struct cgroup. In preparation, make hugetlb_cgroup functions pass around struct hugetlb_cgroup instead of struct cgroup. This patch shouldn't cause any behavior differences. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Li Zefan <lizefan@huawei.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Reviewed-by: Michal Hocko <mhocko@suse.cz> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Johannes Weiner <hannes@cmpxchg.org>
Diffstat (limited to 'mm/hugetlb_cgroup.c')
-rw-r--r--mm/hugetlb_cgroup.c22
1 files changed, 12 insertions, 10 deletions
diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c
index 50f213fc52c7..d2f9fc0b186e 100644
--- a/mm/hugetlb_cgroup.c
+++ b/mm/hugetlb_cgroup.c
@@ -56,17 +56,19 @@ static inline bool hugetlb_cgroup_is_root(struct hugetlb_cgroup *h_cg)
return (h_cg == root_h_cgroup);
}
-static inline struct hugetlb_cgroup *parent_hugetlb_cgroup(struct cgroup *cg)
+static inline struct hugetlb_cgroup *
+parent_hugetlb_cgroup(struct hugetlb_cgroup *h_cg)
{
- if (!cg->parent)
+ struct cgroup *parent = h_cg->css.cgroup->parent;
+
+ if (!parent)
return NULL;
- return hugetlb_cgroup_from_cgroup(cg->parent);
+ return hugetlb_cgroup_from_cgroup(parent);
}
-static inline bool hugetlb_cgroup_have_usage(struct cgroup *cg)
+static inline bool hugetlb_cgroup_have_usage(struct hugetlb_cgroup *h_cg)
{
int idx;
- struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_cgroup(cg);
for (idx = 0; idx < hugetlb_max_hstate; idx++) {
if ((res_counter_read_u64(&h_cg->hugepage[idx], RES_USAGE)) > 0)
@@ -115,15 +117,14 @@ static void hugetlb_cgroup_css_free(struct cgroup *cgroup)
* page reference and test for page active here. This function
* cannot fail.
*/
-static void hugetlb_cgroup_move_parent(int idx, struct cgroup *cgroup,
+static void hugetlb_cgroup_move_parent(int idx, struct hugetlb_cgroup *h_cg,
struct page *page)
{
int csize;
struct res_counter *counter;
struct res_counter *fail_res;
struct hugetlb_cgroup *page_hcg;
- struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_cgroup(cgroup);
- struct hugetlb_cgroup *parent = parent_hugetlb_cgroup(cgroup);
+ struct hugetlb_cgroup *parent = parent_hugetlb_cgroup(h_cg);
page_hcg = hugetlb_cgroup_from_page(page);
/*
@@ -155,6 +156,7 @@ out:
*/
static void hugetlb_cgroup_css_offline(struct cgroup *cgroup)
{
+ struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_cgroup(cgroup);
struct hstate *h;
struct page *page;
int idx = 0;
@@ -163,13 +165,13 @@ static void hugetlb_cgroup_css_offline(struct cgroup *cgroup)
for_each_hstate(h) {
spin_lock(&hugetlb_lock);
list_for_each_entry(page, &h->hugepage_activelist, lru)
- hugetlb_cgroup_move_parent(idx, cgroup, page);
+ hugetlb_cgroup_move_parent(idx, h_cg, page);
spin_unlock(&hugetlb_lock);
idx++;
}
cond_resched();
- } while (hugetlb_cgroup_have_usage(cgroup));
+ } while (hugetlb_cgroup_have_usage(h_cg));
}
int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages,

Privacy Policy