On Sat, May 21, 2022 at 04:14:07PM -0600, Jens Axboe wrote: > Then we're almost on par, and it looks like we just need to special case > iov_iter_advance() for the nr_segs == 1 as well to be on par. This is on > top of your patch as well, fwiw. > > It might make sense to special case the single segment cases, for both > setup, iteration, and advancing. With that, I think we'll be where we > want to be, and there will be no discernable difference between the iter > paths and the old style paths. A while ago willy posted patches to support a new ITER type for direct userspace pointer without iov. It might be worth looking through the archives and test that.
