Date: Tue, 22 Jan 2013 21:44:22 -0600 (CST) From: Bryan Venteicher <bryanv@daemoninthecloset.org> To: Franz Schwartau <franz@electromail.org> Cc: freebsd-stable@freebsd.org, bane ivosev <bane.ivosev@pmf.uns.ac.rs> Subject: Re: kvm vlan virtio problem 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>
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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
>
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