[Edited Message Follows] HI Benoit: Thanks for your reply. I have done the gdb test to track af_xdp_create_queue() function. Acutlly the af_xdp_create_queue() return error value, The function call flow is as below, I doubt that Linux kernel version 5.4 doesn't support af_xdp fucntion for virtio network card.
af_xdp_create_if() -->af_xdp_create_queue() -->af_xdp_create_queue() -->xsk_socket__create() -->xsk_socket__create_shared() -->__xsk_setup_xdp_prog() -->bpf_set_link_xdp_fd() // kernel error message occured: libbpf: Kernel error message: virtio_net: Too few free TX rings available
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