hugetlb: add charge/uncharge calls for HugeTLB alloc/free
This adds necessary charge/uncharge calls in the HugeTLB code. We do
memcg charge in page alloc and uncharge in compound page destructor. We
also need to ignore HugeTLB pages in __mem_cgroup_uncharge_common because
that get called from delete_from_page_cache
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Hillf Danton <dhillf@gmail.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>