-int memcg_charge_kmem(struct mem_cgroup *memcg, gfp_t gfp,
- unsigned long nr_pages)
-{
- struct page_counter *counter;
- int ret = 0;
-
- ret = page_counter_try_charge(&memcg->kmem, nr_pages, &counter);
- if (ret < 0)
- return ret;
-
- ret = try_charge(memcg, gfp, nr_pages);
- if (ret == -EINTR) {
- /*
- * try_charge() chose to bypass to root due to OOM kill or
- * fatal signal. Since our only options are to either fail
- * the allocation or charge it to this cgroup, do it as a
- * temporary condition. But we can't fail. From a kmem/slab
- * perspective, the cache has already been selected, by
- * mem_cgroup_kmem_get_cache(), so it is too late to change
- * our minds.
- *
- * This condition will only trigger if the task entered
- * memcg_charge_kmem in a sane state, but was OOM-killed
- * during try_charge() above. Tasks that were already dying
- * when the allocation triggers should have been already
- * directed to the root cgroup in memcontrol.h
- */
- page_counter_charge(&memcg->memory, nr_pages);
- if (do_swap_account)
- page_counter_charge(&memcg->memsw, nr_pages);
- css_get_many(&memcg->css, nr_pages);
- ret = 0;
- } else if (ret)
- page_counter_uncharge(&memcg->kmem, nr_pages);
-
- return ret;
-}
-
-void memcg_uncharge_kmem(struct mem_cgroup *memcg, unsigned long nr_pages)
-{
- page_counter_uncharge(&memcg->memory, nr_pages);
- if (do_swap_account)
- page_counter_uncharge(&memcg->memsw, nr_pages);
-
- page_counter_uncharge(&memcg->kmem, nr_pages);
-
- css_put_many(&memcg->css, nr_pages);
-}
-