diff options
| author | Jens Axboe <axboe@suse.de> | 2006-01-09 16:02:34 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@suse.de> | 2006-01-09 16:02:34 +0100 |
| commit | ff856bad67cb65cb4dc4ef88b808804fc4265782 (patch) | |
| tree | 2db1e0be2be1e814cf8fe9bb8d3d7401fb24dd86 /include/linux/blkdev.h | |
| parent | 5367f2d67c7d0bf1faae90e6e7b4e2ac3c9b5e0f (diff) | |
[BLOCK] ll_rw_blk: Enable out-of-order request completions through softirq
Request completion can be a quite heavy process, since it needs to
iterate through the entire request and complete the bio's it holds.
This patch adds blk_complete_request() which moves this processing
into a dedicated block softirq.
Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index fb0985377421..804cc4ec9533 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -118,9 +118,9 @@ struct request_list { * try to put the fields that are referenced together in the same cacheline */ struct request { - struct list_head queuelist; /* looking for ->queue? you must _not_ - * access it directly, use - * blkdev_dequeue_request! */ + struct list_head queuelist; + struct list_head donelist; + unsigned long flags; /* see REQ_ bits below */ /* Maintain bio traversal state for part by part I/O submission. @@ -141,6 +141,7 @@ struct request { struct bio *biotail; void *elevator_private; + void *completion_data; unsigned short ioprio; @@ -291,6 +292,7 @@ typedef int (merge_bvec_fn) (request_queue_t *, struct bio *, struct bio_vec *); typedef void (activity_fn) (void *data, int rw); typedef int (issue_flush_fn) (request_queue_t *, struct gendisk *, sector_t *); typedef void (prepare_flush_fn) (request_queue_t *, struct request *); +typedef void (softirq_done_fn)(struct request *); enum blk_queue_state { Queue_down, @@ -332,6 +334,7 @@ struct request_queue activity_fn *activity_fn; issue_flush_fn *issue_flush_fn; prepare_flush_fn *prepare_flush_fn; + softirq_done_fn *softirq_done_fn; /* * Dispatch queue sorting @@ -646,6 +649,17 @@ extern int end_that_request_first(struct request *, int, int); extern int end_that_request_chunk(struct request *, int, int); extern void end_that_request_last(struct request *, int); extern void end_request(struct request *req, int uptodate); +extern void blk_complete_request(struct request *); + +static inline int rq_all_done(struct request *rq, unsigned int nr_bytes) +{ + if (blk_fs_request(rq)) + return (nr_bytes >= (rq->hard_nr_sectors << 9)); + else if (blk_pc_request(rq)) + return nr_bytes >= rq->data_len; + + return 0; +} /* * end_that_request_first/chunk() takes an uptodate argument. we account @@ -694,6 +708,7 @@ extern void blk_queue_segment_boundary(request_queue_t *, unsigned long); extern void blk_queue_prep_rq(request_queue_t *, prep_rq_fn *pfn); extern void blk_queue_merge_bvec(request_queue_t *, merge_bvec_fn *); extern void blk_queue_dma_alignment(request_queue_t *, int); +extern void blk_queue_softirq_done(request_queue_t *, softirq_done_fn *); extern struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev); extern int blk_queue_ordered(request_queue_t *, unsigned, prepare_flush_fn *); extern void blk_queue_issue_flush_fn(request_queue_t *, issue_flush_fn *); |