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authorJens Axboe <axboe@kernel.dk>2017-08-08 17:51:45 -0600
committerJens Axboe <axboe@kernel.dk>2017-08-09 13:09:28 -0600
commitf299b7c7a9dee64425e5965bd4f56dc024c1befc (patch)
treed81520896fad3b9d3e87c19d538ec00c052d1b7c /block/genhd.c
parent0609e0efc5e15195ecf8c6d2f2e890d98760e337 (diff)
downloadlinux-0-day-f299b7c7a9dee64425e5965bd4f56dc024c1befc.tar.gz
blk-mq: provide internal in-flight variant
We don't have to inc/dec some counter, since we can just iterate the tags. That makes inc/dec a noop, but means we have to iterate busy tags to get an in-flight count. Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/genhd.c')
-rw-r--r--block/genhd.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 822f65f..3dc4d11 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -45,6 +45,43 @@ static void disk_add_events(struct gendisk *disk);
static void disk_del_events(struct gendisk *disk);
static void disk_release_events(struct gendisk *disk);
+void part_inc_in_flight(struct request_queue *q, struct hd_struct *part, int rw)
+{
+ if (q->mq_ops)
+ return;
+
+ atomic_inc(&part->in_flight[rw]);
+ if (part->partno)
+ atomic_inc(&part_to_disk(part)->part0.in_flight[rw]);
+}
+
+void part_dec_in_flight(struct request_queue *q, struct hd_struct *part, int rw)
+{
+ if (q->mq_ops)
+ return;
+
+ atomic_dec(&part->in_flight[rw]);
+ if (part->partno)
+ atomic_dec(&part_to_disk(part)->part0.in_flight[rw]);
+}
+
+void part_in_flight(struct request_queue *q, struct hd_struct *part,
+ unsigned int inflight[2])
+{
+ if (q->mq_ops) {
+ blk_mq_in_flight(q, part, inflight);
+ return;
+ }
+
+ inflight[0] = atomic_read(&part->in_flight[0]) +
+ atomic_read(&part->in_flight[1]);
+ if (part->partno) {
+ part = &part_to_disk(part)->part0;
+ inflight[1] = atomic_read(&part->in_flight[0]) +
+ atomic_read(&part->in_flight[1]);
+ }
+}
+
/**
* disk_get_part - get partition
* @disk: disk to look partition from