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block: split tag and sysfs handling from blk-core.c

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Seperates the tag and sysfs handling from ll_rw_blk.

Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jens Axboe 2008-01-29 14:51:59 +01:00
commit 8324aa91d1
5 changed files with 735 additions and 710 deletions
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29
block/blk.h Normal file
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@ -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