Jon Kohler wrote: > > > > On May 7, 2025, at 4:56 PM, Willem de Bruijn <willemdebruijn.kernel@xxxxxxxxx> wrote: > > > > !-------------------------------------------------------------------| > > CAUTION: External Email > > > > |-------------------------------------------------------------------! > > > > Jon Kohler wrote: > >> Use xdp_get_frame_len helper to ensure xdp frame size is calculated > >> correctly in both single buffer and multi buffer configurations. > > > > Not necessarily opposed, but multi buffer is not actually possible > > in this code path, right? > > > > tun_put_user_xdp only copies xdp_frame->data, for one. > > > > Else this would also be fix, not net-next material. > > Correct, this is a prep patch for future multi buffer support, > I’m not aware of any path that can currently do that thru > this code. > > The reason for pursuing multi-buffer is to allow vhost/net > batching to work again for large payloads. I was not aware of that context. I'd add a comment to that in the commit message, and send it as part of that series.
