blkio: Add io controller stats like

- io_service_time
- io_wait_time
- io_serviced
- io_service_bytes

These stats are accumulated per operation type helping us to distinguish between
read and write, and sync and async IO. This patch does not increment any of
these stats.

Signed-off-by: Divyesh Shah<dpshah@google.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 7471d36bce89..c5161bbf2fe9 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -915,7 +915,7 @@ static void cfq_group_served(struct cfq_data *cfqd, struct cfq_group *cfqg,
 
         cfq_log_cfqg(cfqd, cfqg, "served: vt=%llu min_vt=%llu", cfqg->vdisktime,
                                         st->min_vdisktime);
-        blkiocg_update_blkio_group_stats(&cfqg->blkg, used_sl);
+        blkiocg_update_timeslice_used(&cfqg->blkg, used_sl);
 }
 
 #ifdef CONFIG_CFQ_GROUP_IOSCHED