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Diffstat (limited to 'block/blk-iolatency.c')
-rw-r--r--block/blk-iolatency.c51
1 files changed, 14 insertions, 37 deletions
diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index e8859350ab6e..d973c38ee4fd 100644
--- a/block/blk-iolatency.c
+++ b/block/blk-iolatency.c
@@ -600,10 +600,6 @@ static void blkcg_iolatency_done_bio(struct rq_qos *rqos, struct bio *bio)
if (!blkg || !bio_flagged(bio, BIO_TRACKED))
return;
- /* We didn't actually submit this bio, don't account it. */
- if (bio->bi_status == BLK_STS_AGAIN)
- return;
-
iolat = blkg_to_lat(bio->bi_blkg);
if (!iolat)
return;
@@ -622,40 +618,22 @@ static void blkcg_iolatency_done_bio(struct rq_qos *rqos, struct bio *bio)
inflight = atomic_dec_return(&rqw->inflight);
WARN_ON_ONCE(inflight < 0);
- if (iolat->min_lat_nsec == 0)
- goto next;
- iolatency_record_time(iolat, &bio->bi_issue, now,
- issue_as_root);
- window_start = atomic64_read(&iolat->window_start);
- if (now > window_start &&
- (now - window_start) >= iolat->cur_win_nsec) {
- if (atomic64_cmpxchg(&iolat->window_start,
- window_start, now) == window_start)
- iolatency_check_latencies(iolat, now);
+ /*
+ * If bi_status is BLK_STS_AGAIN, the bio wasn't actually
+ * submitted, so do not account for it.
+ */
+ if (iolat->min_lat_nsec && bio->bi_status != BLK_STS_AGAIN) {
+ iolatency_record_time(iolat, &bio->bi_issue, now,
+ issue_as_root);
+ window_start = atomic64_read(&iolat->window_start);
+ if (now > window_start &&
+ (now - window_start) >= iolat->cur_win_nsec) {
+ if (atomic64_cmpxchg(&iolat->window_start,
+ window_start, now) == window_start)
+ iolatency_check_latencies(iolat, now);
+ }
}
-next:
- wake_up(&rqw->wait);
- blkg = blkg->parent;
- }
-}
-
-static void blkcg_iolatency_cleanup(struct rq_qos *rqos, struct bio *bio)
-{
- struct blkcg_gq *blkg;
-
- blkg = bio->bi_blkg;
- while (blkg && blkg->parent) {
- struct rq_wait *rqw;
- struct iolatency_grp *iolat;
-
- iolat = blkg_to_lat(blkg);
- if (!iolat)
- goto next;
-
- rqw = &iolat->rq_wait;
- atomic_dec(&rqw->inflight);
wake_up(&rqw->wait);
-next:
blkg = blkg->parent;
}
}
@@ -671,7 +649,6 @@ static void blkcg_iolatency_exit(struct rq_qos *rqos)
static struct rq_qos_ops blkcg_iolatency_ops = {
.throttle = blkcg_iolatency_throttle,
- .cleanup = blkcg_iolatency_cleanup,
.done_bio = blkcg_iolatency_done_bio,
.exit = blkcg_iolatency_exit,
};