This patch pulls the trigger for multi-page bvecs. Now any request queue which supports queue cluster will see multi-page bvecs. Cc: Dave Chinner <dchinner@xxxxxxxxxx> Cc: Kent Overstreet <kent.overstreet@xxxxxxxxx> Cc: Mike Snitzer <snitzer@xxxxxxxxxx> Cc: dm-devel@xxxxxxxxxx Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx> Cc: linux-fsdevel@xxxxxxxxxxxxxxx Cc: Shaohua Li <shli@xxxxxxxxxx> Cc: linux-raid@xxxxxxxxxxxxxxx Cc: linux-erofs@xxxxxxxxxxxxxxxx Cc: David Sterba <dsterba@xxxxxxxx> Cc: linux-btrfs@xxxxxxxxxxxxxxx Cc: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Cc: linux-xfs@xxxxxxxxxxxxxxx Cc: Gao Xiang <gaoxiang25@xxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> Cc: Theodore Ts'o <tytso@xxxxxxx> Cc: linux-ext4@xxxxxxxxxxxxxxx Cc: Coly Li <colyli@xxxxxxx> Cc: linux-bcache@xxxxxxxxxxxxxxx Cc: Boaz Harrosh <ooo@xxxxxxxxxxxxxxx> Cc: Bob Peterson <rpeterso@xxxxxxxxxx> Cc: cluster-devel@xxxxxxxxxx Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx> --- block/bio.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/block/bio.c b/block/bio.c index 6486722d4d4b..ed6df6f8e63d 100644 --- a/block/bio.c +++ b/block/bio.c @@ -767,12 +767,24 @@ bool __bio_try_merge_page(struct bio *bio, struct page *page, if (bio->bi_vcnt > 0) { struct bio_vec *bv = &bio->bi_io_vec[bio->bi_vcnt - 1]; - - if (page == bv->bv_page && off == bv->bv_offset + bv->bv_len) { - bv->bv_len += len; - bio->bi_iter.bi_size += len; - return true; - } + struct request_queue *q = NULL; + + if (page == bv->bv_page && off == (bv->bv_offset + bv->bv_len) + && (off + len) <= PAGE_SIZE) + goto merge; + + if (bio->bi_disk) + q = bio->bi_disk->queue; + + /* disable multi-page bvec too if cluster isn't enabled */ + if (!q || !blk_queue_cluster(q) || + ((page_to_phys(bv->bv_page) + bv->bv_offset + bv->bv_len) != + (page_to_phys(page) + off))) + return false; + merge: + bv->bv_len += len; + bio->bi_iter.bi_size += len; + return true; } return false; } -- 2.9.5 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel