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 ]------------
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