From: Ilan Smith <ilan.smith@xxxxxxxxxxx>
When expedite_swapin and expedite_dmpg are set, move the
requests ahead of the queue.
Signed-off-by: Ilan Smith <ilan.smith@xxxxxxxxxxx>
Signed-off-by: Alex Lemberg <alex.lemberg@xxxxxxxxxxx>
Signed-off-by: Venkatraman S <svenkatr@xxxxxx>
---
block/blk-core.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/block/blk-core.c b/block/blk-core.c
index 3a78b00..0b54ee9 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1305,6 +1305,12 @@ void init_request_from_bio(struct request *req, struct bio *bio)
if (bio->bi_rw & REQ_RAHEAD)
req->cmd_flags |= REQ_FAILFAST_MASK;
+ if (bio_swapin(bio) && blk_queue_exp_swapin(req->q))
+ req->cmd_flags |= REQ_RW_SWAPIN;
+
+ if (bio_dmpg(bio) && blk_queue_exp_dmpg(req->q))
+ req->cmd_flags |= REQ_RW_DMPG;
+
req->errors = 0;
req->__sector = bio->bi_sector;
req->ioprio = bio_prio(bio);
@@ -1332,6 +1338,18 @@ void blk_queue_bio(struct request_queue *q, struct bio *bio)
goto get_rq;
}
+ if (bio_swapin(bio) && blk_queue_exp_swapin(q)) {
+ spin_lock_irq(q->queue_lock);
+ where = ELEVATOR_INSERT_FRONT;
+ goto get_rq;
+ }
+
+ if (bio_dmpg(bio) && blk_queue_exp_dmpg(q)) {
+ spin_lock_irq(q->queue_lock);
+ where = ELEVATOR_INSERT_FRONT;
+ goto get_rq;
+ }
+
/*
* Check if we can merge with the plugged list before grabbing
* any locks.
--
1.7.10.rc2
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