On Thu, 2023-02-02 at 19:00 +0800, Xuan Zhuo wrote: > XDP socket(AF_XDP) is an excellent bypass kernel network framework. The zero > copy feature of xsk (XDP socket) needs to be supported by the driver. The > performance of zero copy is very good. mlx5 and intel ixgbe already support > this feature, This patch set allows virtio-net to support xsk's zerocopy xmit > feature. > > Virtio-net did not support per-queue reset, so it was impossible to support XDP > Socket Zerocopy. At present, we have completed the work of Virtio Spec and > Kernel in Per-Queue Reset. It is time for Virtio-Net to complete the support for > the XDP Socket Zerocopy. > > Virtio-net can not increase the queue at will, so xsk shares the queue with > kernel. > > On the other hand, Virtio-Net does not support generate interrupt manually, so > when we wakeup tx xmit, we used some tips. If the CPU run by TX NAPI last time > is other CPUs, use IPI to wake up NAPI on the remote CPU. If it is also the > local CPU, then we wake up sofrirqd. Thank you for the large effort. Since this will likely need a few iterations, on next revision please do split the work in multiple chunks to help the reviewer efforts - from Documentation/process/maintainer-netdev.rst: - don't post large series (> 15 patches), break them up In this case I guess you can split it in 1 (or even 2) pre-req series and another one for the actual xsk zero copy support. Thanks! Paolo
