On Sat, Jan 02, 2021 at 03:17:34PM +0000, Pavel Begunkov wrote: > zero-length bvec segments are allowed in general, but not handled by bio > and down the block layer so filtered out. This inconsistency may be > confusing and prevent from optimisations. As zero-length segments are > useless and places that were generating them are patched, declare them > not allowed. Looks good, Reviewed-by: Christoph Hellwig <hch@xxxxxx>