prev_busy_level  1357 block/blk-iocost.c 	int prev_busy_level, i;
prev_busy_level  1545 block/blk-iocost.c 	prev_busy_level = ioc->busy_level;
prev_busy_level  1609 block/blk-iocost.c 	} else if (ioc->busy_level != prev_busy_level || nr_lagging) {