From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [net-next PATCH 3/5] virtio_net: remove duplicate queue pair binding in XDP Date: Fri, 3 Feb 2017 06:23:13 +0200 Message-ID: <20170203062308-mutt-send-email-mst@kernel.org> References: <20170202231404.14366.64298.stgit@john-Precision-Tower-5810> <20170202232114.14366.57526.stgit@john-Precision-Tower-5810> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: kubakici@wp.pl, jasowang@redhat.com, ast@fb.com, john.r.fastabend@intel.com, netdev@vger.kernel.org To: John Fastabend Return-path: Received: from mx1.redhat.com ([209.132.183.28]:44986 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752409AbdBCEXQ (ORCPT ); Thu, 2 Feb 2017 23:23:16 -0500 Content-Disposition: inline In-Reply-To: <20170202232114.14366.57526.stgit@john-Precision-Tower-5810> Sender: netdev-owner@vger.kernel.org List-ID: On Thu, Feb 02, 2017 at 03:21:14PM -0800, John Fastabend wrote: > Factor out qp assignment. > > Signed-off-by: John Fastabend Acked-by: Michael S. Tsirkin > --- > drivers/net/virtio_net.c | 18 +++++++----------- > 1 file changed, 7 insertions(+), 11 deletions(-) > > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c > index b9576f2..2dcb142 100644 > --- a/drivers/net/virtio_net.c > +++ b/drivers/net/virtio_net.c > @@ -341,15 +341,19 @@ static struct sk_buff *page_to_skb(struct virtnet_info *vi, > > static bool virtnet_xdp_xmit(struct virtnet_info *vi, > struct receive_queue *rq, > - struct send_queue *sq, > struct xdp_buff *xdp, > void *data) > { > struct virtio_net_hdr_mrg_rxbuf *hdr; > unsigned int num_sg, len; > + struct send_queue *sq; > + unsigned int qp; > void *xdp_sent; > int err; > > + qp = vi->curr_queue_pairs - vi->xdp_queue_pairs + smp_processor_id(); > + sq = &vi->sq[qp]; > + > /* Free up any pending old buffers before queueing new ones. */ > while ((xdp_sent = virtqueue_get_buf(sq->vq, &len)) != NULL) { > if (vi->mergeable_rx_bufs) { > @@ -415,7 +419,6 @@ static struct sk_buff *receive_small(struct net_device *dev, > if (xdp_prog) { > struct virtio_net_hdr_mrg_rxbuf *hdr = buf; > struct xdp_buff xdp; > - unsigned int qp; > u32 act; > > if (unlikely(hdr->hdr.gso_type || hdr->hdr.flags)) > @@ -429,10 +432,7 @@ static struct sk_buff *receive_small(struct net_device *dev, > case XDP_PASS: > break; > case XDP_TX: > - qp = vi->curr_queue_pairs - > - vi->xdp_queue_pairs + > - smp_processor_id(); > - virtnet_xdp_xmit(vi, rq, &vi->sq[qp], &xdp, skb); > + virtnet_xdp_xmit(vi, rq, &xdp, skb); > rcu_read_unlock(); > goto xdp_xmit; > default: > @@ -557,7 +557,6 @@ static struct sk_buff *receive_mergeable(struct net_device *dev, > if (xdp_prog) { > struct page *xdp_page; > struct xdp_buff xdp; > - unsigned int qp; > void *data; > u32 act; > > @@ -599,10 +598,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev, > } > break; > case XDP_TX: > - qp = vi->curr_queue_pairs - > - vi->xdp_queue_pairs + > - smp_processor_id(); > - virtnet_xdp_xmit(vi, rq, &vi->sq[qp], &xdp, data); > + virtnet_xdp_xmit(vi, rq, &xdp, data); > ewma_pkt_len_add(&rq->mrg_avg_pkt_len, len); > if (unlikely(xdp_page != page)) > goto err_xdp;