The incoming bio will become very big after multipage bvec is enabled, so we can't clone bio page by page. This patch uses the introduced bio_clone_chunk_bioset(), so the incoming bio can be cloned successfully. This way is safe because device mapping won't modify the bio vector on the cloned multipage bio. Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx> --- drivers/md/dm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 98dff36b89a3..13ca3574d972 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1582,8 +1582,8 @@ static blk_qc_t __split_and_process_bio(struct mapped_device *md, * the usage of io->orig_bio in dm_remap_zone_report() * won't be affected by this reassignment. */ - struct bio *b = bio_clone_bioset(bio, GFP_NOIO, - &md->queue->bio_split); + struct bio *b = bio_clone_chunk_bioset(bio, GFP_NOIO, + &md->queue->bio_split); ci.io->orig_bio = b; bio_advance(bio, (bio_sectors(bio) - ci.sector_count) << 9); bio_chain(b, bio); -- 2.9.5
