void throttle_info_release(void *throttle_info);
void throttle_info_update(void *throttle_info, int flags);
uint32_t throttle_lowpri_io(int sleep_amount);
+/* returns TRUE if the throttle_lowpri_io called with the same sleep_amount would've slept */
+int throttle_lowpri_io_will_be_throttled(int sleep_amount);
void throttle_set_thread_io_policy(int policy);
int throttle_get_thread_effective_io_policy(void);