From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [net-next RFC V5 4/5] virtio_net: multiqueue support Date: Sun, 29 Jul 2012 12:50:21 +0300 Message-ID: <20120729095021.GC8977@redhat.com> References: <1341484194-8108-1-git-send-email-jasowang@redhat.com> <1341484194-8108-5-git-send-email-jasowang@redhat.com> <20120720134014.GD16550@redhat.com> <500CE5B3.3040404@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: krkumar2@in.ibm.com, habanero@linux.vnet.ibm.com, mashirle@us.ibm.com, kvm@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, edumazet@google.com, tahm@linux.vnet.ibm.com, jwhan@filewood.snu.ac.kr, davem@davemloft.net, sri@us.ibm.com To: Jason Wang Return-path: Content-Disposition: inline In-Reply-To: <500CE5B3.3040404@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org List-Id: netdev.vger.kernel.org On Mon, Jul 23, 2012 at 01:48:35PM +0800, Jason Wang wrote: > >>+ } > >> > >>- if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ)) { > >>+ ret = vi->vdev->config->find_vqs(vi->vdev, total_vqs, vqs, callbacks, > >>+ (const char **)names); > >>+ if (ret) > >>+ goto err; > >>+ > >>+ if (vi->has_cvq) > >> vi->cvq = vqs[2]; > >> > >>- if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VLAN)) > >>- vi->dev->features |= NETIF_F_HW_VLAN_FILTER; > >>+ for (i = 0; i< vi->num_queue_pairs * 2; i += 2) { > >>+ int j = i == 0 ? i : i + vi->has_cvq; > >>+ vi->rq[i / 2]->vq = vqs[j]; > >>+ vi->sq[i / 2]->vq = vqs[j + 1]; > >Same here. > > Consider the code is really simple, seem no need to use helpers. Well it was not simple to at least one reader :) The problem is not this logic is complex, it is that it is spread all over the code. If we had e.g. vnet_tx_vqn_to_queuenum vnet_tx_queuenum_to_vqn and same for rx, then the logic would all be in one place, and have a tidy comment on top explaining the VQ numbering scheme. -- MST