block: loop: pass multi-page bvec to iov_iter
iov_iter is implemented on bvec itererator helpers, so it is safe to pass multi-page bvec to it, and this way is much more efficient than passing one page in each bvec. Reviewed-by:Christoph Hellwig <hch@lst.de> Reviewed-by:
Omar Sandoval <osandov@fb.com> Signed-off-by:
Ming Lei <ming.lei@redhat.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
parent
c3a7ce73
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