From owner-freebsd-stable@FreeBSD.ORG Wed Jan 23 03:44:31 2013 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 21B08204 for ; Wed, 23 Jan 2013 03:44:31 +0000 (UTC) (envelope-from bryanv@daemoninthecloset.org) Received: from torment.daemoninthecloset.org (ip-static-94-242-209-234.as5577.net [94.242.209.234]) by mx1.freebsd.org (Postfix) with ESMTP id B8BA5791 for ; Wed, 23 Jan 2013 03:44:30 +0000 (UTC) Received: from sage.daemoninthecloset.org (unknown [70.114.209.60]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "sage.daemoninthecloset.org", Issuer "daemoninthecloset.org" (verified OK)) by torment.daemoninthecloset.org (Postfix) with ESMTPS id 9D26A42C256D; Wed, 23 Jan 2013 04:46:52 +0100 (CET) X-Virus-Scanned: amavisd-new at daemoninthecloset.org X-Virus-Scanned: amavisd-new at daemoninthecloset.org Date: Tue, 22 Jan 2013 21:44:22 -0600 (CST) From: Bryan Venteicher To: Franz Schwartau Message-ID: <627694717.15.1358912662920.JavaMail.root@daemoninthecloset.org> In-Reply-To: <50FE627C.7070701@electromail.org> References: <2103527496.1667.1351994019607.JavaMail.root@daemoninthecloset.org> <50FE627C.7070701@electromail.org> Subject: Re: kvm vlan virtio problem MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [192.168.10.20] X-Mailer: Zimbra 8.0.2_GA_5569 (ZimbraWebClient - GC20 ([unknown])/8.0.2_GA_5569) Thread-Topic: kvm vlan virtio problem Thread-Index: rwbdQLLJ9tPY/ZKQ0lN/LuPqChcXYw== Cc: freebsd-stable@freebsd.org, bane ivosev X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 Jan 2013 03:44:31 -0000 Hi, ----- Original Message ----- > Hi! > > The same warning shows up in our setup: > > Jan 21 23:40:46 host kernel: WARNING: at net/core/dev.c:1712 > skb_gso_segment+0x1df/0x2b0() (Tainted: G W --------------- ) > Jan 21 23:40:46 host kernel: Hardware name: System Product Name > Jan 21 23:40:46 host kernel: tun: caps=(0x1b0049, 0x0) len=4452 > data_len=4380 ip_summed=0 > [...] > > KVM host: CentOS 6.3, Linux kernel 2.6.32-279.19.1.el6.x86_64 > VM guest: FreeBSD 9.1, virtio-kmod-9.1-0.242658 > > Disabling TSO on vtnet0 stops the warnings on the KVM host. > > Is there any progress on this issue? > Alright, I tried to recreate this on Ubuntu 12.10 without any luck. Please describe your network configuration. On my Linux host, my VLAN interface looks like: eth0.100 Link encap:Ethernet HWaddr 6c:f0:49:05:2b:6d inet6 addr: fe80::6ef0:49ff:fe05:2b6d/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3119867 errors:0 dropped:0 overruns:0 frame:0 TX packets:3790183 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:166813040 (166.8 MB) TX bytes:5435432448 (5.4 GB) That is plugged into this bridge: br100 Link encap:Ethernet HWaddr 6c:f0:49:05:2b:6d inet addr:192.168.99.101 Bcast:192.168.99.255 Mask:255.255.255.0 inet6 addr: fe80::6ef0:49ff:fe05:2b6d/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:14 errors:0 dropped:0 overruns:0 frame:0 TX packets:18 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:876 (876.0 B) TX bytes:1420 (1.4 KB) With the tap device created by QEMU for my FreeBSD guest: vnet1 Link encap:Ethernet HWaddr fe:54:00:ec:4f:4e inet6 addr: fe80::fc54:ff:feec:4f4e/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:800284 errors:0 dropped:0 overruns:0 frame:0 TX packets:3119877 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:5238099122 (5.2 GB) TX bytes:210492002 (210.4 MB) All this tied together: # brctl show br100 bridge name bridge id STP enabled interfaces br100 8000.6cf049052b6d no eth0.100 vnet1 Does this approximate your configuration? What's the output of `ethtool -k` for your VLAN, bridge, and vnet interfaces? Bryan > Best regards > Franz >