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block: Consolidate phys_segment and hw_segment limits

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Except for SCSI no device drivers distinguish between physical and
hardware segment limits.  Consolidate the two into a single segment
limit.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Martin K. Petersen
2010-02-26 00:20:39 -05:00
committed by Jens Axboe
parent 086fa5ff08
commit 8a78362c4e
35 changed files with 70 additions and 136 deletions
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block/blk-merge.c
+2 -6
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@@ -206,8 +206,7 @@ static inline int ll_new_hw_segment(struct request_queue *q,
{
int nr_phys_segs = bio_phys_segments(q, bio);
if (req->nr_phys_segments + nr_phys_segs > queue_max_hw_segments(q) ||
req->nr_phys_segments + nr_phys_segs > queue_max_phys_segments(q)) {
if (req->nr_phys_segments + nr_phys_segs > queue_max_segments(q)) {
req->cmd_flags |= REQ_NOMERGE;
if (req == q->last_merge)
q->last_merge = NULL;
@@ -300,10 +299,7 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req,
total_phys_segments--;
}
if (total_phys_segments > queue_max_phys_segments(q))
return 0;
if (total_phys_segments > queue_max_hw_segments(q))
if (total_phys_segments > queue_max_segments(q))
return 0;
/* Merge is OK... */