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author | Jens Axboe <jens.axboe@oracle.com> | 2008-01-29 14:51:59 +0100 |
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committer | Jens Axboe <jens.axboe@oracle.com> | 2008-01-29 21:55:07 +0100 |
commit | 8324aa91d1e11a1fc25f209687a0b2e6c2ed47d0 (patch) | |
tree | c63753df94b741d328840edabde74462591ca0b3 /block/blk.h | |
parent | a168ee84c90b39ece357da127ab388f2f64db19c (diff) | |
download | linux-stable-8324aa91d1e11a1fc25f209687a0b2e6c2ed47d0.tar.gz linux-stable-8324aa91d1e11a1fc25f209687a0b2e6c2ed47d0.tar.bz2 linux-stable-8324aa91d1e11a1fc25f209687a0b2e6c2ed47d0.zip |
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 <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk.h')
-rw-r--r-- | block/blk.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/block/blk.h b/block/blk.h new file mode 100644 index 000000000000..d88549df1b09 --- /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 |