blk-merge: compute bio->bi_seg_front_size efficiently

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It is enough to check and compute bio->bi_seg_front_size just
after the 1st segment is found, but current code checks that
for each bvec, which is inefficient.

This patch follows the way in  __blk_recalc_rq_segments()
for computing bio->bi_seg_front_size, and it is more efficient
and code becomes more readable too.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Ming Lei 2017-12-18 20:22:14 +08:00 • committed by Jens Axboe

parent 92681eca61

commit 6a501bf080

1 changed files with 5 additions and 4 deletions

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block/blk-merge.c

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