On Thu, 1 Mar 2018 16:49:24 +0800 Jason Wang <jasow...@redhat.com> wrote:
> > 2. This can easily cause out-of-order packets. > > I may miss something, but it looks to me packets were still delivered > in order? Or you mean the packets that was dropped by cpumap? No. Packets can now travel two code paths to the egress device. (1) XDP native via ndp_xdp_xmit via direct delivery into a lockfree/dedicated TX queue, (2) via normal network stack which can involve being queue in a qdisc. Do you see the possibility of the reorder now? -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer
