Ilya Dryomov <idryomov@xxxxxxxxx> wrote: > > Btw, is it feasible to use con->v2.out_iter_sendpage to apply > > MSG_SPLICE_PAGES to the iterator to be transmitted as a whole? It seems > > to be set depending on iterator type. > > I'm not sure I understand what you mean by "transmitted as a whole". > con->v2.out_iter_sendpage is set only when zerocopy is desired. If the > underlying data is not guaranteed to remain stable, zerocopy behavior > is not safe. I think I need to reinstate the per-page sendpage_ok() check here also - though Al pointed out it isn't sufficiently exhaustive. There are pages that sendpage_ok() will return true on that you shouldn't be passing to sendpage(). I'll whip up a patch to partially revert this also. David
