memcg: memory cgroup resource counters for hierarchy

[profile/ivi/kernel-adaptation-intel-automotive.git] / mm / memcontrol.c

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 9846f61..e72fb2b 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -471,6 +471,7 @@ static int __mem_cgroup_try_charge(struct mm_struct *mm,
 {
        struct mem_cgroup *mem;
        int nr_retries = MEM_CGROUP_RECLAIM_RETRIES;
+       struct res_counter *fail_res;
        /*
         * We always charge the cgroup the mm_struct belongs to.
         * The mm_struct's mem_cgroup changes on task migration if the
@@ -499,11 +500,12 @@ static int __mem_cgroup_try_charge(struct mm_struct *mm,
                int ret;
                bool noswap = false;
 
-               ret = res_counter_charge(&mem->res, PAGE_SIZE);
+               ret = res_counter_charge(&mem->res, PAGE_SIZE, &fail_res);
                if (likely(!ret)) {
                        if (!do_swap_account)
                                break;
-                       ret = res_counter_charge(&mem->memsw, PAGE_SIZE);
+                       ret = res_counter_charge(&mem->memsw, PAGE_SIZE,
+                                                       &fail_res);
                        if (likely(!ret))
                                break;
                        /* mem+swap counter fails */
@@ -1709,22 +1711,26 @@ static void __init enable_swap_cgroup(void)
 static struct cgroup_subsys_state *
 mem_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont)
 {
-       struct mem_cgroup *mem;
+       struct mem_cgroup *mem, *parent;
        int node;
 
        mem = mem_cgroup_alloc();
        if (!mem)
                return ERR_PTR(-ENOMEM);
 
-       res_counter_init(&mem->res);
-       res_counter_init(&mem->memsw);
-
        for_each_node_state(node, N_POSSIBLE)
                if (alloc_mem_cgroup_per_zone_info(mem, node))
                        goto free_out;
        /* root ? */
-       if (cont->parent == NULL)
+       if (cont->parent == NULL) {
                enable_swap_cgroup();
+               parent = NULL;
+       } else
+               parent = mem_cgroup_from_cont(cont->parent);
+
+       res_counter_init(&mem->res, parent ? &parent->res : NULL);
+       res_counter_init(&mem->memsw, parent ? &parent->memsw : NULL);
+
 
        return &mem->css;
 free_out: