Commits
Ming Lei committed c18a1e09008
block: introduce bio_clone_bioset_partial() md still need bio clone(not the fast version) for behind write, and it is more efficient to use bio_clone_bioset_partial(). The idea is simple and just copy the bvecs range specified from parameters. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jens Axboe <axboe@fb.com> Signed-off-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Shaohua Li <shli@fb.com>