Sridhar Samudrala <sridhar.samudrala@xxxxxxxxx> writes:
> int xdp_do_redirect(struct net_device *dev, struct xdp_buff *xdp,
> struct bpf_prog *xdp_prog)
> {
> struct bpf_redirect_info *ri = this_cpu_ptr(&bpf_redirect_info);
> struct bpf_map *map = READ_ONCE(ri->map);
> + struct xdp_sock *xsk;
> +
> + xsk = xdp_get_direct_xsk(ri);
> + if (xsk)
> + return xsk_rcv(xsk, xdp);
This is a new branch and a read barrier in the XDP_REDIRECT fast path.
What's the performance impact of that for non-XSK redirect?
-Toke
