On Mon, 2016-09-12 at 16:07 -0700, Alexei Starovoitov wrote: > yep. there are various ways to shoot yourself in the foot with xdp. > The simplest program that drops all the packets will make the box unpingable.
Well, my comment was about XDP_TX only, not about XDP_DROP or driving a scooter on 101 highway ;) This XDP_TX thing was one of the XDP marketing stuff, but there is absolutely no documentation on it, warning users about possible limitations/outcomes. BTW, I am not sure mlx4 implementation even works, vs BQL : mlx4_en_xmit_frame() does not call netdev_tx_sent_queue(), but tx completion will call netdev_tx_completed_queue() -> crash Do we have one test to validate that a XDP_TX implementation is actually correct ?
