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Groups > linux.kernel > #1547643

[PATCH v1 54/54] block: enable multipage bvecs

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This patch pulls the trigger for multipage bvecs.

Any request queue which doesn't set QUEUE_FLAG_NO_MP
should support to handle multipage bvecs.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
---
 block/bio.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/block/bio.c b/block/bio.c
index 9acc3db0f2df..a2ad9c577aff 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -843,6 +843,11 @@ int bio_add_page(struct bio *bio, struct page *page,
 	 * a consecutive offset.  Optimize this special case.
 	 */
 	if (bio->bi_vcnt > 0) {
+		struct request_queue *q = NULL;
+
+		if (bio->bi_bdev)
+			q = bdev_get_queue(bio->bi_bdev);
+
 		bv = &bio->bi_io_vec[bio->bi_vcnt - 1];
 
 		if (page == bv->bv_page &&
@@ -850,6 +855,14 @@ int bio_add_page(struct bio *bio, struct page *page,
 			bv->bv_len += len;
 			goto done;
 		}
+
+		/* disable multipage bvec too if cluster isn't enabled */
+		if (q && !blk_queue_no_mp(q) && blk_queue_cluster(q) &&
+		    (bvec_to_phys(bv) + bv->bv_len ==
+		     page_to_phys(page) + offset)) {
+			bv->bv_len += len;
+			goto done;
+		}
 	}
 
 	if (bio->bi_vcnt >= bio->bi_max_vecs)
-- 
2.7.4

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[PATCH v1 32/54] block: introduce bvec_get_last_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 53/54] btrfs: comment on direct access bvec table Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 46/54] fs: crypto: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 36/54] dm-crypt: don't clear bvec->bv_page in crypt_free_buffer_pages() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 50/54] fs/buffer.c: use bvec iterator to truncate the bio Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 54/54] block: enable multipage bvecs Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 47/54] fs/btrfs: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 33/54] block: deal with dirtying pages for multipage bvec Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 38/54] md/raid1.c: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 51/54] btrfs: avoid access to .bi_vcnt directly Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 52/54] btrfs: use bvec_get_last_sp to get the last singlepage bvec Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 39/54] fs/mpage: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 37/54] dm-crypt: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 35/54] bcache: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:10 +0100
  [PATCH v1 49/54] fs/iomap.c: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:20 +0100
  [PATCH v1 44/54] f2fs: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:20 +0100
  [PATCH v1 48/54] fs/block_dev.c: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:20 +0100
  [PATCH v1 34/54] block: convert to singe/multi page version of bio_for_each_segment_all() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:20 +0100
  [PATCH v1 41/54] ext4: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:20 +0100
  [PATCH v1 43/54] gfs2: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:20 +0100
  [PATCH v1 40/54] fs/direct-io: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:20 +0100
  [PATCH v1 45/54] exofs: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:20 +0100
    Re: [PATCH v1 45/54] exofs: convert to bio_for_each_segment_all_sp() Boaz Harrosh <ooo@electrozaur.com> - 2017-01-03 16:10 +0100
  [PATCH v1 42/54] xfs: convert to bio_for_each_segment_all_sp() Ming Lei <tom.leiming@gmail.com> - 2016-12-27 17:20 +0100

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