MEMCG_SWAP_MAX
atomic_long_read(&memcg->memory_events[MEMCG_SWAP_MAX]));
bool swap_event = event == MEMCG_SWAP_HIGH || event == MEMCG_SWAP_MAX ||
memcg_memory_event(memcg, MEMCG_SWAP_MAX);
atomic_long_read(&memcg->memory_events[MEMCG_SWAP_MAX]));