On 8/29/2024 5:03 AM, Roger Quadros wrote: > The XDP implementation on am65-cpsw driver is broken in many ways > and this series fixes it. > > Below are the current issues that are being fixed: > > 1) The following XDP_DROP test from [1] stalls the interface after > 250 packets. > ~# xdb-bench drop -m native eth0 > This is because new RX requests are never queued. Fix that. > > 2) The below XDP_TX test from [1] fails with a warning > [ 499.947381] XDP_WARN: xdp_update_frame_from_buff(line:277): Driver BUG: missing reserved tailroom > ~# xdb-bench tx -m native eth0 > Fix that by using PAGE_SIZE during xdp_init_buf(). > > 3) In XDP_REDIRECT case only 1 packet was processed in rx_poll. > Fix it to process up to budget packets. > ~# ./xdp-bench redirect -m native eth0 eth0 > > 4) If number of TX queues are set to 1 we get a NULL pointer > dereference during XDP_TX. > ~# ethtool -L eth0 tx 1 > ~# ./xdp-trafficgen udp -A <ipv6-src> -a <ipv6-dst> eth0 -t 2 > Transmitting on eth0 (ifindex 2) > [ 241.135257] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030 > > 5) Net statistics is broken for XDP_TX and XDP_REDIRECT > > [1] xdp-tools suite https://github.com/xdp-project/xdp-tools > Everything in this series looks good to me. Reviewed-by: Jacob Keller <jacob.e.keller@xxxxxxxxx>
