drbd: add missing part_round_stats to _drbd_start_io_acct

Without this, iostat frequently sees bogus svctime and >= 100% "utilization".

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index ef145e33a647..810070146862 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -37,6 +37,7 @@ static void _drbd_start_io_acct(struct drbd_conf *mdev, struct drbd_request *req
         const int rw = bio_data_dir(bio);
         int cpu;
         cpu = part_stat_lock();
+        part_round_stats(cpu, &mdev->vdisk->part0);
         part_stat_inc(cpu, &mdev->vdisk->part0, ios[rw]);
         part_stat_add(cpu, &mdev->vdisk->part0, sectors[rw], bio_sectors(bio));
         part_inc_in_flight(&mdev->vdisk->part0, rw);