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block: set .bi_max_vecs as actual allocated vector number

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bvec_alloc() may allocate more bio vectors than requested, so set
.bi_max_vecs as actual allocated vector number, instead of the requested
number. This way can help fs build bigger bio because new bio often won't
be allocated until the current one becomes full.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei 2021-01-11 11:05:55 +08:00 committed by Jens Axboe
parent 9f180e315a
commit baa2c7c971
1 changed files with 2 additions and 1 deletions
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3
block/bio.c
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@ -505,12 +505,13 @@ struct bio *bio_alloc_bioset(gfp_t gfp_mask, unsigned int nr_iovecs,
goto err_free; goto err_free;
bio->bi_flags |= idx << BVEC_POOL_OFFSET; bio->bi_flags |= idx << BVEC_POOL_OFFSET;
bio->bi_max_vecs = bvec_nr_vecs(idx);
} else if (nr_iovecs) { } else if (nr_iovecs) {
bvl = bio->bi_inline_vecs; bvl = bio->bi_inline_vecs;
bio->bi_max_vecs = inline_vecs;
} }
bio->bi_pool = bs; bio->bi_pool = bs;
bio->bi_max_vecs = nr_iovecs;
bio->bi_io_vec = bvl; bio->bi_io_vec = bvl;
return bio; return bio;