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authorOmar Sandoval <osandov@fb.com>2018-04-26 00:21:59 -0700
committerJens Axboe <axboe@kernel.dk>2018-04-26 09:02:01 -0600
commitbf0ddaba65ddbb2715af97041da8e7a45b2d8628 (patch)
tree42ecea860351829817753e8ce2c4205a8aaff8b1 /block/blk-mq.c
parent6131837b1de66116459ef4413e26fdbc70d066dc (diff)
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blk-mq: fix sysfs inflight counter
When the blk-mq inflight implementation was added, /proc/diskstats was converted to use it, but /sys/block/$dev/inflight was not. Fix it by adding another helper to count in-flight requests by data direction. Fixes: f299b7c7a9de ("blk-mq: provide internal in-flight variant") Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
-rw-r--r--block/blk-mq.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 5450cbc61f8d..9ce9cac16c3f 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -115,6 +115,25 @@ void blk_mq_in_flight(struct request_queue *q, struct hd_struct *part,
blk_mq_queue_tag_busy_iter(q, blk_mq_check_inflight, &mi);
}
+static void blk_mq_check_inflight_rw(struct blk_mq_hw_ctx *hctx,
+ struct request *rq, void *priv,
+ bool reserved)
+{
+ struct mq_inflight *mi = priv;
+
+ if (rq->part == mi->part)
+ mi->inflight[rq_data_dir(rq)]++;
+}
+
+void blk_mq_in_flight_rw(struct request_queue *q, struct hd_struct *part,
+ unsigned int inflight[2])
+{
+ struct mq_inflight mi = { .part = part, .inflight = inflight, };
+
+ inflight[0] = inflight[1] = 0;
+ blk_mq_queue_tag_busy_iter(q, blk_mq_check_inflight_rw, &mi);
+}
+
void blk_freeze_queue_start(struct request_queue *q)
{
int freeze_depth;