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blk-mq-sched: add flush insertion into blk_mq_sched_insert_request()

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Instead of letting the caller check this and handle the details
of inserting a flush request, put the logic in the scheduler
insertion function. This fixes direct flush insertion outside
of the usual make_request_fn calls, like from dm via
blk_insert_cloned_request().

Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Jens Axboe
2017-01-27 01:00:47 -07:00
parent f73f44eb00
commit bd6737f1ae
8 changed files with 89 additions and 55 deletions
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block/blk-flush.c
+1 -1
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@@ -456,7 +456,7 @@ void blk_insert_flush(struct request *rq)
if ((policy & REQ_FSEQ_DATA) &&
!(policy & (REQ_FSEQ_PREFLUSH | REQ_FSEQ_POSTFLUSH))) {
if (q->mq_ops)
blk_mq_sched_insert_request(rq, false, true, false);
blk_mq_sched_insert_request(rq, false, true, false, false);
else
list_add_tail(&rq->queuelist, &q->queue_head);
return;