Updating max_usage is something one would expect when we reach
a new maximum usage value even when we do this by forcing through
the limit with res_counter_charge_nofail().

(Whether we want to account failcnt when we force through the limit
is another debate).
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: NTejun Heo <tj@kernel.org>
Acked-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: NGlauber Costa <glommer@parallels.com>
Acked-by: NKirill A. Shutemov <kirill@shutemov.name>
Cc: Li Zefan <lizefan@huawei.com>