block: make the flush insertion use the tail of the dispatch list
It's not a preempt type request, in fact we have to insert it
behind requests that do specify INSERT_FRONT.
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/block/blk-flush.c b/block/blk-flush.c
index d6275cb..eba4a27 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -261,7 +261,7 @@
q->flush_rq.end_io = flush_end_io;
q->flush_pending_idx ^= 1;
- __elv_add_request(q, &q->flush_rq, ELEVATOR_INSERT_REQUEUE);
+ list_add_tail(&q->flush_rq.queuelist, &q->queue_head);
return true;
}
@@ -312,7 +312,7 @@
*/
if ((policy & REQ_FSEQ_DATA) &&
!(policy & (REQ_FSEQ_PREFLUSH | REQ_FSEQ_POSTFLUSH))) {
- list_add(&rq->queuelist, &q->queue_head);
+ list_add_tail(&rq->queuelist, &q->queue_head);
return;
}