From 24391c0dc57c3756a219defaa781e68637d6ab7d Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Fri, 23 Jan 2015 14:18:00 -0700 Subject: blk-mq: add tag allocation policy This is the blk-mq part to support tag allocation policy. The default allocation policy isn't changed (though it's not a strict FIFO). The new policy is round-robin for libata. But it's a try-best implementation. If multiple tasks are competing, the tags returned will be mixed (which is unavoidable even with !mq, as requests from different tasks can be mixed in queue) Cc: Jens Axboe Cc: Tejun Heo Cc: Christoph Hellwig Signed-off-by: Shaohua Li Signed-off-by: Jens Axboe --- block/blk-mq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'block/blk-mq.c') diff --git a/block/blk-mq.c b/block/blk-mq.c index a7d4a988516f..eb8e694fda06 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1374,7 +1374,8 @@ static struct blk_mq_tags *blk_mq_init_rq_map(struct blk_mq_tag_set *set, size_t rq_size, left; tags = blk_mq_init_tags(set->queue_depth, set->reserved_tags, - set->numa_node); + set->numa_node, + BLK_MQ_FLAG_TO_ALLOC_POLICY(set->flags)); if (!tags) return NULL; -- cgit v1.2.3