From 8324aa91d1e11a1fc25f209687a0b2e6c2ed47d0 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Tue, 29 Jan 2008 14:51:59 +0100 Subject: block: split tag and sysfs handling from blk-core.c Seperates the tag and sysfs handling from ll_rw_blk. Signed-off-by: Jens Axboe --- block/blk.h | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 block/blk.h (limited to 'block/blk.h') diff --git a/block/blk.h b/block/blk.h new file mode 100644 index 0000000..d88549d --- /dev/null +++ b/block/blk.h @@ -0,0 +1,29 @@ +#ifndef BLK_INTERNAL_H +#define BLK_INTERNAL_H + +extern struct kmem_cache *blk_requestq_cachep; +extern struct kobj_type blk_queue_ktype; + +void __blk_queue_free_tags(struct request_queue *q); + +void blk_queue_congestion_threshold(struct request_queue *q); + +/* + * Return the threshold (number of used requests) at which the queue is + * considered to be congested. It include a little hysteresis to keep the + * context switch rate down. + */ +static inline int queue_congestion_on_threshold(struct request_queue *q) +{ + return q->nr_congestion_on; +} + +/* + * The threshold at which a queue is considered to be uncongested + */ +static inline int queue_congestion_off_threshold(struct request_queue *q) +{ + return q->nr_congestion_off; +} + +#endif -- cgit v1.1