On Fri, 18 May 2018 15:34:57 +0200 Jesper Dangaard Brouer <bro...@redhat.com> wrote:
> When sending an xdp_frame through xdp_do_redirect call, then error > cases can happen where the xdp_frame needs to be dropped, and > returning an -errno code isn't sufficient/possible any-longer > (e.g. for cpumap case). This is already fully supported, by simply > calling xdp_return_frame. > > This patch is an optimization, which provides xdp_return_frame_rx_napi, > which is a faster variant for these error cases. It take advantage of > the protection provided by XDP RX running under NAPI protection. > > This change is mostly relevant for drivers using the page_pool > allocator as it can take advantage of this. (Tested with mlx5). Signed-off-by: Jesper Dangaard Brouer <bro...@redhat.com> Ups, forgot my SoB... hope it's sufficient to add it this way. -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer
