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block: continue ll_rw_blk.c splitup

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Adds files for barrier handling, rq execution, io context handling,
mapping data to requests, and queue settings.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe
2008-01-29 14:53:40 +01:00
parent 8324aa91d1
commit 86db1e2977
8 changed files with 1312 additions and 1249 deletions
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17
block/blk.h
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@@ -1,11 +1,28 @@
#ifndef BLK_INTERNAL_H
#define BLK_INTERNAL_H
/* Amount of time in which a process may batch requests */
#define BLK_BATCH_TIME (HZ/50UL)
/* Number of requests a "batching" process may submit */
#define BLK_BATCH_REQ 32
extern struct kmem_cache *blk_requestq_cachep;
extern struct kobj_type blk_queue_ktype;
void rq_init(struct request_queue *q, struct request *rq);
void init_request_from_bio(struct request *req, struct bio *bio);
void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
struct bio *bio);
int ll_back_merge_fn(struct request_queue *q, struct request *req,
struct bio *bio);
void __blk_queue_free_tags(struct request_queue *q);
void blk_unplug_work(struct work_struct *work);
void blk_unplug_timeout(unsigned long data);
struct io_context *current_io_context(gfp_t gfp_flags, int node);
void blk_queue_congestion_threshold(struct request_queue *q);
/*