VRATE_CLAMP_ADJ_PCT 1581 block/blk-iocost.c vrate = div64_u64(vrate * (100 + VRATE_CLAMP_ADJ_PCT), VRATE_CLAMP_ADJ_PCT 1585 block/blk-iocost.c vrate = div64_u64(vrate * (100 - VRATE_CLAMP_ADJ_PCT),