[PATCH V6 16/30] dm: clone bio via bio_clone_chunk_bioset
From: Ming Lei
Date: Sat Jun 09 2018 - 08:33:54 EST
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
@@ -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,
+ struct bio *b = bio_clone_chunk_bioset(bio, GFP_NOIO,
ci.io->orig_bio = b;
bio_advance(bio, (bio_sectors(bio) - ci.sector_count) << 9);