diff options
Diffstat (limited to 'mm/hugetlb_cgroup.c')
| -rw-r--r-- | mm/hugetlb_cgroup.c | 42 |
1 files changed, 25 insertions, 17 deletions
diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c index a3f358fb8a0c..9cea7de22ffb 100644 --- a/mm/hugetlb_cgroup.c +++ b/mm/hugetlb_cgroup.c @@ -77,7 +77,7 @@ static inline bool hugetlb_cgroup_have_usage(struct cgroup *cg) return false; } -static struct cgroup_subsys_state *hugetlb_cgroup_create(struct cgroup *cgroup) +static struct cgroup_subsys_state *hugetlb_cgroup_css_alloc(struct cgroup *cgroup) { int idx; struct cgroup *parent_cgroup; @@ -101,7 +101,7 @@ static struct cgroup_subsys_state *hugetlb_cgroup_create(struct cgroup *cgroup) return &h_cgroup->css; } -static void hugetlb_cgroup_destroy(struct cgroup *cgroup) +static void hugetlb_cgroup_css_free(struct cgroup *cgroup) { struct hugetlb_cgroup *h_cgroup; @@ -155,18 +155,13 @@ out: * Force the hugetlb cgroup to empty the hugetlb resources by moving them to * the parent cgroup. */ -static int hugetlb_cgroup_pre_destroy(struct cgroup *cgroup) +static void hugetlb_cgroup_css_offline(struct cgroup *cgroup) { struct hstate *h; struct page *page; - int ret = 0, idx = 0; + int idx = 0; do { - if (cgroup_task_count(cgroup) || - !list_empty(&cgroup->children)) { - ret = -EBUSY; - goto out; - } for_each_hstate(h) { spin_lock(&hugetlb_lock); list_for_each_entry(page, &h->hugepage_activelist, lru) @@ -177,8 +172,6 @@ static int hugetlb_cgroup_pre_destroy(struct cgroup *cgroup) } cond_resched(); } while (hugetlb_cgroup_have_usage(cgroup)); -out: - return ret; } int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages, @@ -340,7 +333,7 @@ static char *mem_fmt(char *buf, int size, unsigned long hsize) return buf; } -int __init hugetlb_cgroup_file_init(int idx) +static void __init __hugetlb_cgroup_file_init(int idx) { char buf[32]; struct cftype *cft; @@ -382,7 +375,22 @@ int __init hugetlb_cgroup_file_init(int idx) WARN_ON(cgroup_add_cftypes(&hugetlb_subsys, h->cgroup_files)); - return 0; + return; +} + +void __init hugetlb_cgroup_file_init(void) +{ + struct hstate *h; + + for_each_hstate(h) { + /* + * Add cgroup control files only if the huge page consists + * of more than two normal pages. This is because we use + * page[2].lru.next for storing cgroup details. + */ + if (huge_page_order(h) >= HUGETLB_CGROUP_MIN_ORDER) + __hugetlb_cgroup_file_init(hstate_index(h)); + } } /* @@ -411,8 +419,8 @@ void hugetlb_cgroup_migrate(struct page *oldhpage, struct page *newhpage) struct cgroup_subsys hugetlb_subsys = { .name = "hugetlb", - .create = hugetlb_cgroup_create, - .pre_destroy = hugetlb_cgroup_pre_destroy, - .destroy = hugetlb_cgroup_destroy, - .subsys_id = hugetlb_subsys_id, + .css_alloc = hugetlb_cgroup_css_alloc, + .css_offline = hugetlb_cgroup_css_offline, + .css_free = hugetlb_cgroup_css_free, + .subsys_id = hugetlb_subsys_id, }; |