Enhanced partition statistics: update partition statitics
Updates the enhanced partition statistics in generic block layer
besides the disk statistics.
Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/block/blk-core.c b/block/blk-core.c
index fba4ca7..2358fc5 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -60,10 +60,15 @@
return;
if (!new_io) {
- __disk_stat_inc(rq->rq_disk, merges[rw]);
+ __all_stat_inc(rq->rq_disk, merges[rw], rq->sector);
} else {
+ struct hd_struct *part = get_part(rq->rq_disk, rq->sector);
disk_round_stats(rq->rq_disk);
rq->rq_disk->in_flight++;
+ if (part) {
+ part_round_stats(part);
+ part->in_flight++;
+ }
}
}
@@ -997,6 +1002,21 @@
}
EXPORT_SYMBOL_GPL(disk_round_stats);
+void part_round_stats(struct hd_struct *part)
+{
+ unsigned long now = jiffies;
+
+ if (now == part->stamp)
+ return;
+
+ if (part->in_flight) {
+ __part_stat_add(part, time_in_queue,
+ part->in_flight * (now - part->stamp));
+ __part_stat_add(part, io_ticks, (now - part->stamp));
+ }
+ part->stamp = now;
+}
+
/*
* queue lock must be held
*/
@@ -1530,7 +1550,8 @@
if (blk_fs_request(req) && req->rq_disk) {
const int rw = rq_data_dir(req);
- disk_stat_add(req->rq_disk, sectors[rw], nr_bytes >> 9);
+ all_stat_add(req->rq_disk, sectors[rw],
+ nr_bytes >> 9, req->sector);
}
total_bytes = bio_nbytes = 0;
@@ -1715,11 +1736,16 @@
if (disk && blk_fs_request(req) && req != &req->q->bar_rq) {
unsigned long duration = jiffies - req->start_time;
const int rw = rq_data_dir(req);
+ struct hd_struct *part = get_part(disk, req->sector);
- __disk_stat_inc(disk, ios[rw]);
- __disk_stat_add(disk, ticks[rw], duration);
+ __all_stat_inc(disk, ios[rw], req->sector);
+ __all_stat_add(disk, ticks[rw], duration, req->sector);
disk_round_stats(disk);
disk->in_flight--;
+ if (part) {
+ part_round_stats(part);
+ part->in_flight--;
+ }
}
if (req->end_io)
