diff options
| -rw-r--r-- | block/blk-mq.c | 8 | ||||
| -rw-r--r-- | block/elevator.c | 23 |
2 files changed, 16 insertions, 15 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 004411236034..c3bd5b48a5b1 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2910,11 +2910,9 @@ 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); - if (!(set->flags & BLK_MQ_F_NO_SCHED)) { - ret = elevator_init_mq(q); - if (ret) - goto err_tag_set; - } + ret = elevator_init_mq(q); + if (ret) + goto err_tag_set; return q; diff --git a/block/elevator.c b/block/elevator.c index 86100de88883..4721834815bb 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -619,16 +619,26 @@ out: return ret; } +static inline bool elv_support_iosched(struct request_queue *q) +{ + if (q->tag_set && (q->tag_set->flags & BLK_MQ_F_NO_SCHED)) + return false; + return true; +} + /* - * For blk-mq devices, we default to using mq-deadline, if available, for single - * queue devices. If deadline isn't available OR we have multiple queues, - * default to "none". + * For blk-mq devices supporting IO scheduling, we default to using mq-deadline, + * if available, for single queue devices. If deadline isn't available OR we + * have multiple queues, default to "none". */ int elevator_init_mq(struct request_queue *q) { struct elevator_type *e; int err = 0; + if (!elv_support_iosched(q)) + return 0; + if (q->nr_hw_queues != 1) return 0; @@ -706,13 +716,6 @@ static int __elevator_change(struct request_queue *q, const char *name) return elevator_switch(q, e); } -static inline bool elv_support_iosched(struct request_queue *q) -{ - if (q->tag_set && (q->tag_set->flags & BLK_MQ_F_NO_SCHED)) - return false; - return true; -} - ssize_t elv_iosched_store(struct request_queue *q, const char *name, size_t count) { |