kvm vlan virtio problem

[Bane Ivosev]

hi, i have several kvm ubuntu 12.04 and centos 6 hosts with standard 
bridged network setup. same problem on each server with freebsd 9 amd64 
guest and virtio nic: soon after guest start host syslog is filling with 
this message at very high rate. guest is working without any problem. 
with e1000 guest driver eveything is ok.

does enyone have/had same problem?

thanks.


  kernel: [2337728.094141] ------------[ cut here ]------------
  kernel: [2337728.094144] WARNING: at 
/build/buildd/linux-3.2.0/net/core/dev.c:1955 skb_gso_segment+0x341/0x3b0()
  kernel: [2337728.094146] Hardware name: System x3550 M3 -[7944K3G]-
  kernel: [2337728.094148] 802.1Q VLAN Support: caps=(0x30195833, 0x0) 
len=3196 data_len=0 ip_summed=0
  kernel: [2337728.094149] Modules linked in: dm_snapshot 
ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE 
iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state 
nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp 
iptable_filter ip_tables x_tables kvm_intel kvm dm_crypt nfsd nfs lockd 
fscache auth_rpcgss nfs_acl sunrpc nls_iso8859_1 nls_cp437 vfat fat 
8021q garp bridge stp serio_raw cdc_ether usbnet vhost_net macvtap 
i7core_edac macvlan shpchp ioatdma edac_core dca tpm_tis lp parport 
mac_hid btrfs zlib_deflate libcrc32c usbhid hid megaraid_sas bnx2
  kernel: [2337728.094177] Pid: 8685, comm: vhost-8683 Tainted: G 
  W    3.2.0-31-generic #50-Ubuntu
  kernel: [2337728.094179] Call Trace:
  kernel: [2337728.094180]  <IRQ>  [<ffffffff81066d7f>] 
warn_slowpath_common+0x7f/0xc0
  kernel: [2337728.094185]  [<ffffffff81066e76>] warn_slowpath_fmt+0x46/0x50
  kernel: [2337728.094188]  [<ffffffff8153f581>] skb_gso_segment+0x341/0x3b0
  kernel: [2337728.094191]  [<ffffffff81542ee1>] 
dev_hard_start_xmit+0xc1/0x540
  kernel: [2337728.094196]  [<ffffffffa01c0150>] ? br_flood+0xc0/0xc0 
[bridge]
  kernel: [2337728.094199]  [<ffffffff8154360a>] dev_queue_xmit+0x2aa/0x420
  kernel: [2337728.094203]  [<ffffffffa01c01e2>] 
br_dev_queue_push_xmit+0x92/0xd0 [bridge]
  kernel: [2337728.094208]  [<ffffffffa01c0278>] 
br_forward_finish+0x58/0x60 [bridge]
  kernel: [2337728.094212]  [<ffffffffa01c042b>] __br_forward+0xab/0xd0 
[bridge]
  kernel: [2337728.094217]  [<ffffffffa01c04ed>] br_forward+0x5d/0x70 
[bridge]
  kernel: [2337728.094221]  [<ffffffffa01c11c2>] 
br_handle_frame_finish+0x182/0x2a0 [bridge]
  kernel: [2337728.094226]  [<ffffffffa01c14a8>] 
br_handle_frame+0x1c8/0x270 [bridge]
  kernel: [2337728.094231]  [<ffffffffa01c12e0>] ? 
br_handle_frame_finish+0x2a0/0x2a0 [bridge]
  kernel: [2337728.094234]  [<ffffffff81540892>] 
__netif_receive_skb+0x1e2/0x520
  kernel: [2337728.094237]  [<ffffffff81540ff1>] process_backlog+0xb1/0x190
  kernel: [2337728.094240]  [<ffffffff815422e4>] net_rx_action+0x134/0x290
  kernel: [2337728.094242]  [<ffffffff8165a4fe>] ? _raw_spin_lock+0xe/0x20
  kernel: [2337728.094245]  [<ffffffff8106e528>] __do_softirq+0xa8/0x210
  kernel: [2337728.094248]  [<ffffffff81664d6c>] call_softirq+0x1c/0x30
  kernel: [2337728.094249]  <EOI>  [<ffffffff81015305>] do_softirq+0x65/0xa0
  kernel: [2337728.094254]  [<ffffffff815427c8>] netif_rx_ni+0x28/0x30
  kernel: [2337728.094258]  [<ffffffff81478ec6>] tun_get_user+0x306/0x4a0
  kernel: [2337728.094261]  [<ffffffff81479085>] tun_sendmsg+0x25/0x30
  kernel: [2337728.094265]  [<ffffffffa01b09b6>] handle_tx+0x296/0x530 
[vhost_net]
  kernel: [2337728.094269]  [<ffffffffa01b0c85>] 
handle_tx_kick+0x15/0x20 [vhost_net]
  kernel: [2337728.094273]  [<ffffffffa01ade3d>] vhost_worker+0xdd/0x170 
[vhost_net]
  kernel: [2337728.094276]  [<ffffffffa01add60>] ? 
vhost_set_memory+0x130/0x130 [vhost_net]
  kernel: [2337728.094279]  [<ffffffff8108a03c>] kthread+0x8c/0xa0
  kernel: [2337728.094282]  [<ffffffff81664c74>] 
kernel_thread_helper+0x4/0x10
  kernel: [2337728.094285]  [<ffffffff81089fb0>] ? 
flush_kthread_worker+0xa0/0xa0
  kernel: [2337728.094287]  [<ffffffff81664c70>] ? gs_change+0x13/0x13
  kernel: [2337728.094289] ---[ end trace a38cf088269411b3 ]---
  kernel: [2337728.094731] ------------[ cut here ]------------