[PATCH 13/13] block: enable polling by default if a poll map is initalized
From: Christoph Hellwig <hch@lst.de>
Date: 2018-12-02 16:48:27
Also in:
linux-nvme
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
If the user did setup polling in the driver we should not require another know in the block layer to enable it. Signed-off-by: Christoph Hellwig <hch@lst.de> --- block/blk-mq.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 9c90c5038d07..a550a00ac00c 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c@@ -2811,6 +2811,8 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set, q->tag_set = set; q->queue_flags |= QUEUE_FLAG_MQ_DEFAULT; + if (set->nr_maps > HCTX_TYPE_POLL) + blk_queue_flag_set(QUEUE_FLAG_POLL, q); if (!(set->flags & BLK_MQ_F_SG_MERGE)) blk_queue_flag_set(QUEUE_FLAG_NO_SG_MERGE, q);
--
2.19.1