Commit 015c1bd9 authored Apr 04, 2017 by Liu Bo Committed by David Sterba Jun 19, 2017

Btrfs: use bio_clone_fast to clone our bio



For raid1 and raid10, we clone the original bio to the bios which are then
sent to different disks.

Right now we use bio_clone_bioset to create a clone bio with iterating
bi_io_vec to initialize it.  This changes it to use bio_clone_fast()
which creates a clone bio but only copies the bi_io_vec pointer
instead of iterating bi_io_vec.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

parent 7870d082

fs/btrfs/extent_io.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2694,7 +2694,7 @@ struct bio btrfs_bio_clone(struct bio bio, gfp_t gfp_mask)
		struct btrfs_io_bio *btrfs_bio;
		struct bio *new;

		new = bio_clone_bioset(bio, gfp_mask, btrfs_bioset);
		new = bio_clone_fast(bio, gfp_mask, btrfs_bioset);
		if (new) {
		btrfs_bio = btrfs_io_bio(new);
		btrfs_bio->csum = NULL;

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