diff --git a/block/bio.c b/block/bio.c
index b5bbc023d64d96742f79720ca491f83aa8ab87d4..48092fe0c1164e5ae94cf14d351c81f83a30f880 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1689,7 +1689,10 @@ void generic_start_io_acct(struct request_queue *q, int op,
 	const int sgrp = op_stat_group(op);
 	int cpu = part_stat_lock();
 
-	part_round_stats(q, cpu, part);
+	if (precise_iostat)
+		part_round_stats(q, cpu, part);
+	else
+		update_io_ticks(cpu, part, jiffies, false);
 	part_stat_inc(cpu, part, ios[sgrp]);
 	part_stat_add(cpu, part, sectors[sgrp], sectors);
 	part_inc_in_flight(q, part, op_is_write(op));
diff --git a/block/blk-core.c b/block/blk-core.c
index 5892c532ae5b754302a82eba4e97a03635283168..219aee53a1be4a7dd33a3178f9805e4208c5cca2 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -2864,7 +2864,10 @@ void blk_account_io_start(struct request *rq, bool new_io)
 		part_stat_inc(cpu, part, merges[rw]);
 	} else {
 		part = disk_map_sector_rcu(rq->rq_disk, blk_rq_pos(rq));
-		part_round_stats(rq->q, cpu, part);
+		if (!precise_iostat)
+			update_io_ticks(cpu, part, jiffies, false);
+		else
+			part_round_stats(rq->q, cpu, part);
 		part_inc_in_flight(rq->q, part, rw);
 		rq->part = part;
 	}