On Fri, Jul 23, 2021 at 10:58:34PM +0200, Andreas Gruenbacher wrote: > Introduce a new fault_in_iov_iter helper for manually faulting in an iterator. > Other than fault_in_pages_writeable(), this function is non-destructive. > > We'll use fault_in_iov_iter in gfs2 once we've determined that the iterator > passed to .read_iter or .write_iter isn't in memory.
Hmm... I suspect that this is going to be much heavier for read access than the existing variant. Do we ever want it for anything other than writes?
