Messages in this thread | | | Subject | Re: [PATCH net-next 2/2] virtio-net: simplify XDP handling in small buffer | From | Jason Wang <> | Date | Thu, 1 Mar 2018 17:24:35 +0800 |
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On 2018年03月01日 17:15, Jesper Dangaard Brouer wrote: > On Thu, 1 Mar 2018 16:49:24 +0800 > Jason Wang <jasowang@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? >
I see, thanks. But consider this could only happen for first few packets, not sure it was worth to worry about it.
Thanks
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