*
* Caller is responsible for holding css reference on the memcg.
*/
-static int mem_cgroup_reparent_charges(struct mem_cgroup *memcg)
+static void mem_cgroup_reparent_charges(struct mem_cgroup *memcg)
{
- struct cgroup *cgrp = memcg->css.cgroup;
int node, zid;
do {
- if (cgroup_task_count(cgrp) || !list_empty(&cgrp->children))
- return -EBUSY;
/* This is for making all *used* pages to be on LRU. */
lru_add_drain_all();
drain_all_stock_sync(memcg);
* charge before adding to the LRU.
*/
} while (res_counter_read_u64(&memcg->res, RES_USAGE) > 0);
-
- return 0;
}
/*
}
lru_add_drain();
- return mem_cgroup_reparent_charges(memcg);
+ mem_cgroup_reparent_charges(memcg);
+
+ return 0;
}
static int mem_cgroup_force_empty_write(struct cgroup *cont, unsigned int event)
static int mem_cgroup_pre_destroy(struct cgroup *cont)
{
struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
- int ret;
- css_get(&memcg->css);
- ret = mem_cgroup_reparent_charges(memcg);
- css_put(&memcg->css);
-
- return ret;
+ mem_cgroup_reparent_charges(memcg);
+ return 0;
}
static void mem_cgroup_destroy(struct cgroup *cont)