diff options
| -rw-r--r-- | block/blk-mq.c | 12 | ||||
| -rw-r--r-- | block/elevator.c | 7 | ||||
| -rw-r--r-- | block/genhd.c | 9 | ||||
| -rw-r--r-- | drivers/md/dm-rq.c | 2 | ||||
| -rw-r--r-- | include/linux/blk-mq.h | 3 |
5 files changed, 28 insertions, 5 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index d10a7ab4207a..3647776a0f6e 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2695,7 +2695,11 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set) if (!uninit_q) return ERR_PTR(-ENOMEM); - q = blk_mq_init_allocated_queue(set, uninit_q); + /* + * Initialize the queue without an elevator. device_add_disk() will do + * the initialization. + */ + q = blk_mq_init_allocated_queue(set, uninit_q, false); if (IS_ERR(q)) blk_cleanup_queue(uninit_q); @@ -2846,7 +2850,8 @@ static unsigned int nr_hw_queues(struct blk_mq_tag_set *set) } struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set, - struct request_queue *q) + struct request_queue *q, + bool elevator_init) { /* mark the queue as mq asap */ q->mq_ops = set->ops; @@ -2908,7 +2913,8 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set, blk_mq_add_queue_tag_set(set, q); blk_mq_map_swqueue(q); - elevator_init_mq(q); + if (elevator_init) + elevator_init_mq(q); return q; diff --git a/block/elevator.c b/block/elevator.c index 520d6b224b74..096a670d22d7 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -712,7 +712,14 @@ void elevator_init_mq(struct request_queue *q) if (!e) return; + blk_mq_freeze_queue(q); + blk_mq_quiesce_queue(q); + err = blk_mq_init_sched(q, e); + + blk_mq_unquiesce_queue(q); + blk_mq_unfreeze_queue(q); + if (err) { pr_warn("\"%s\" elevator initialization failed, " "falling back to \"none\"\n", e->elevator_name); diff --git a/block/genhd.c b/block/genhd.c index 54f1f0d381f4..26b31fcae217 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -695,6 +695,15 @@ static void __device_add_disk(struct device *parent, struct gendisk *disk, dev_t devt; int retval; + /* + * The disk queue should now be all set with enough information about + * the device for the elevator code to pick an adequate default + * elevator if one is needed, that is, for devices requesting queue + * registration. + */ + if (register_queue) + elevator_init_mq(disk->queue); + /* minors == 0 indicates to use ext devt from part0 and should * be accompanied with EXT_DEVT flag. Make sure all * parameters make sense. diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c index 21d5c1784d0c..3f8577e2c13b 100644 --- a/drivers/md/dm-rq.c +++ b/drivers/md/dm-rq.c @@ -563,7 +563,7 @@ int dm_mq_init_request_queue(struct mapped_device *md, struct dm_table *t) if (err) goto out_kfree_tag_set; - q = blk_mq_init_allocated_queue(md->tag_set, md->queue); + q = blk_mq_init_allocated_queue(md->tag_set, md->queue, true); if (IS_ERR(q)) { err = PTR_ERR(q); goto out_tag_set; diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 62a3bb715899..0bf056de5cc3 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -248,7 +248,8 @@ enum { struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *); struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set, - struct request_queue *q); + struct request_queue *q, + bool elevator_init); struct request_queue *blk_mq_init_sq_queue(struct blk_mq_tag_set *set, const struct blk_mq_ops *ops, unsigned int queue_depth, |