MEMCG_MAX
memory_failcnt = atomic_long_read(&memcg->memory_events[MEMCG_MAX]);
VM_WARN_ON_ONCE(!allow_spinning && event != MEMCG_MAX);
__memcg_memory_event(mem_over_limit, MEMCG_MAX, allow_spinning);
__memcg_memory_event(mem_over_limit, MEMCG_MAX, allow_spinning);
seq_printf(m, "max %lu\n", atomic_long_read(&events[MEMCG_MAX]));