4 extern struct kmem_cache *blk_requestq_cachep;
5 extern struct kobj_type blk_queue_ktype;
7 void __blk_queue_free_tags(struct request_queue *q);
9 void blk_queue_congestion_threshold(struct request_queue *q);
12 * Return the threshold (number of used requests) at which the queue is
13 * considered to be congested. It include a little hysteresis to keep the
14 * context switch rate down.
16 static inline int queue_congestion_on_threshold(struct request_queue *q)
18 return q->nr_congestion_on;
22 * The threshold at which a queue is considered to be uncongested
24 static inline int queue_congestion_off_threshold(struct request_queue *q)
26 return q->nr_congestion_off;