AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

block: get rid of likely/unlikely predictions in merge logic

Browse Source 
They tend to depend a lot on the workload, so not a clear-cut
likely or unlikely fit.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2008-05-07 09:33:55 +02:00
parent 7f3d4ee108
commit 2cdf79cafb
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
block/blk-merge.c
View File

@ -149,9 +149,9 @@ static int blk_phys_contig_segment(struct request_queue *q, struct bio *bio,
static int blk_hw_contig_segment(struct request_queue *q, struct bio *bio,
struct bio *nxt)
{
if (unlikely(!bio_flagged(bio, BIO_SEG_VALID)))
if (!bio_flagged(bio, BIO_SEG_VALID))
blk_recount_segments(q, bio);
if (unlikely(!bio_flagged(nxt, BIO_SEG_VALID)))
if (!bio_flagged(nxt, BIO_SEG_VALID))
blk_recount_segments(q, nxt);
if (!BIOVEC_VIRT_MERGEABLE(__BVEC_END(bio), __BVEC_START(nxt)) ||
BIOVEC_VIRT_OVERSIZE(bio->bi_hw_back_size + nxt->bi_hw_front_size))
@ -312,9 +312,9 @@ int ll_back_merge_fn(struct request_queue *q, struct request *req,
q->last_merge = NULL;
return 0;
}
if (unlikely(!bio_flagged(req->biotail, BIO_SEG_VALID)))
if (!bio_flagged(req->biotail, BIO_SEG_VALID))
blk_recount_segments(q, req->biotail);
if (unlikely(!bio_flagged(bio, BIO_SEG_VALID)))
if (!bio_flagged(bio, BIO_SEG_VALID))
blk_recount_segments(q, bio);
len = req->biotail->bi_hw_back_size + bio->bi_hw_front_size;
if (BIOVEC_VIRT_MERGEABLE(__BVEC_END(req->biotail), __BVEC_START(bio))
@ -352,9 +352,9 @@ int ll_front_merge_fn(struct request_queue *q, struct request *req,
return 0;
}
len = bio->bi_hw_back_size + req->bio->bi_hw_front_size;
if (unlikely(!bio_flagged(bio, BIO_SEG_VALID)))
if (!bio_flagged(bio, BIO_SEG_VALID))
blk_recount_segments(q, bio);
if (unlikely(!bio_flagged(req->bio, BIO_SEG_VALID)))
if (!bio_flagged(req->bio, BIO_SEG_VALID))
blk_recount_segments(q, req->bio);
if (BIOVEC_VIRT_MERGEABLE(__BVEC_END(bio), __BVEC_START(req->bio)) &&
!BIOVEC_VIRT_OVERSIZE(len)) {