rack_compensate_for_linerate
rack->r_ctl.bw_rate_cap = rack_compensate_for_linerate(rack, rc_cur->cspr);
rack->r_ctl.fillcw_cap = rack_compensate_for_linerate(rack, rc_cur->cspr);
calcbw = rack_compensate_for_linerate(rack, calcbw);
ret_bw = rack_compensate_for_linerate(rack, ret_bw);