From 3d2936f457a847d9d88a9cc127e0eb7a0ebba0ff Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Tue, 27 May 2014 23:35:14 +0800 Subject: block: only allocate/free mq_usage_counter in blk-mq The percpu counter is only used for blk-mq, so move its allocation and free inside blk-mq, and don't allocate it for legacy queue device. Signed-off-by: Ming Lei Signed-off-by: Jens Axboe --- block/blk-mq.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'block/blk-mq.c') diff --git a/block/blk-mq.c b/block/blk-mq.c index 07851753a049..e8b5f74dc1a1 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1781,6 +1781,9 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set) if (!q) goto err_hctxs; + if (percpu_counter_init(&q->mq_usage_counter, 0)) + goto err_map; + q->mq_map = blk_mq_make_queue_map(set); if (!q->mq_map) goto err_map; @@ -1867,6 +1870,8 @@ void blk_mq_free_queue(struct request_queue *q) blk_mq_exit_hw_queues(q, set, set->nr_hw_queues); blk_mq_free_hw_queues(q, set); + percpu_counter_destroy(&q->mq_usage_counter); + free_percpu(q->queue_ctx); kfree(q->queue_hw_ctx); kfree(q->mq_map); -- cgit v1.2.3