R5C_LOG_TIGHT
test_bit(R5C_LOG_TIGHT, &conf->cache_state))
if (test_bit(R5C_LOG_TIGHT, &conf->cache_state)) {
set_bit(R5C_LOG_TIGHT, &conf->cache_state);
clear_bit(R5C_LOG_TIGHT, &conf->cache_state);
bool try_loprio = test_bit(R5C_LOG_TIGHT, &conf->cache_state) ||