On Thu, Sep 09, 2021 at 03:19:56PM -0600, Jens Axboe wrote: > Not sure how we'd do that, outside of stupid tricks like copy the > iov_iter before we pass it down. But that's obviously not going to be > very efficient. Hence we're left with having some way to reset/reexpand, > even in the presence of someone having done truncate on it. "Obviously" why, exactly? It's not that large a structure; it's not the optimal variant, but I'd like to see profiling data before assuming that it'll cause noticable slowdowns.
