From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vladislav Yasevich Subject: [PATCH net 3/3] virtio-net: enable TSO/checksum offloads for Q-in-Q vlans Date: Thu, 18 May 2017 09:31:05 -0400 Message-ID: <1495114265-23368-4-git-send-email-vyasevic@redhat.com> References: <1495114265-23368-1-git-send-email-vyasevic@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: virtualization@lists.linux-foundation.org, "Michael S. Tsirkin" To: netdev@vger.kernel.org Return-path: In-Reply-To: <1495114265-23368-1-git-send-email-vyasevic@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 Since virtio does not provide it's own ndo_features_check handler, TSO, and now checksum offload, are disabled for stacked vlans. Re-enable the support and let the host take care of it. This restores/improves Guest-to-Guest performance over Q-in-Q vlans. CC: "Michael S. Tsirkin" CC: Jason Wang CC: virtualization@lists.linux-foundation.org Signed-off-by: Vladislav Yasevich --- drivers/net/virtio_net.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 8324a5e..341fb96 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2028,6 +2028,7 @@ static const struct net_device_ops virtnet_netdev = { .ndo_poll_controller = virtnet_netpoll, #endif .ndo_xdp = virtnet_xdp, + .ndo_features_check = passthru_features_check, }; static void virtnet_config_changed_work(struct work_struct *work) -- 2.7.4