From: Matthew Cover <werekra...@gmail.com> Date: Thu, 15 Nov 2018 21:10:16 -0700
> When writing packets to a descriptor associated with a combined queue, the > packets should end up on that queue. > > Before this change all packets written to any descriptor associated with a > tap interface end up on rx-0, even when the descriptor is associated with a > different queue. > > The rx traffic can be generated by either of the following. > 1. a simple tap program which spins up multiple queues and writes packets > to each of the file descriptors > 2. tx from a qemu vm with a tap multiqueue netdev > > The queue for rx traffic can be observed by either of the following (done > on the hypervisor in the qemu case). > 1. a simple netmap program which opens and reads from per-queue > descriptors > 2. configuring RPS and doing per-cpu captures with rxtxcpu > > Alternatively, if you printk() the return value of skb_get_rx_queue() just > before each instance of netif_receive_skb() in tun.c, you will get 65535 > for every skb. > > Calling skb_record_rx_queue() to set the rx queue to the queue_index fixes > the association between descriptor and rx queue. > > Signed-off-by: Matthew Cover <matthew.co...@stackpath.com> As noted by Jason, tun_xdp_one() needs this fix too. Can you please add that to your patch and resubmit? Thanks.
