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authorJosef Bacik <jbacik@fb.com>2018-07-03 11:15:00 -0400
committerJens Axboe <axboe@kernel.dk>2018-07-09 09:07:54 -0600
commit67b42d0bf7a8fd1ec0cf1acdc9550e688d7c8578 (patch)
treef6aab5ca56ab6ba71846d93ff81afd0d34d3a3c1 /block/blk-rq-qos.c
parentc1c80384c8f47021a01a0cc42894a06bed2b801b (diff)
downloadlinux-67b42d0bf7a8fd1ec0cf1acdc9550e688d7c8578.tar.bz2
rq-qos: introduce dio_bio callback
wbt cares only about request completion time, but controllers may need information that is on the bio itself, so add a done_bio callback for rq-qos so things like blk-iolatency can use it to have the bio when it completes. Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-rq-qos.c')
-rw-r--r--block/blk-rq-qos.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/block/blk-rq-qos.c b/block/blk-rq-qos.c
index b7b02e04f64f..5134b24482f6 100644
--- a/block/blk-rq-qos.c
+++ b/block/blk-rq-qos.c
@@ -88,6 +88,16 @@ void rq_qos_track(struct request_queue *q, struct request *rq, struct bio *bio)
}
}
+void rq_qos_done_bio(struct request_queue *q, struct bio *bio)
+{
+ struct rq_qos *rqos;
+
+ for(rqos = q->rq_qos; rqos; rqos = rqos->next) {
+ if (rqos->ops->done_bio)
+ rqos->ops->done_bio(rqos, bio);
+ }
+}
+
/*
* Return true, if we can't increase the depth further by scaling
*/