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[Thiago Martins <thiagocmartinsc@xxxxxxxxx>]

Guys,

Please, ignore the following content from my previous post:

---
BTW, all my KVM Guests running behind this bnx2 NIC, have poor network performance. For example:

* From client-x to host: iperf shows ~900Mbits/s
* From client-x to guest-1 (ubuntu): iperf shows ~150Mbits/s
* From client-x to guest-2 (pfsense - e1000): iperf shows ~200Mbits/s
* From client-x to guest-2 (pfsense - virtio): iperf shows ~120MBtis/s

So, I starting to think that the bnx2 drivers for Linux is crap.

What do you guys think?!
---

Simple because it is not related to the topic and I'm doing more tests,
ubuntu guest is okay now, only pfsense guest still have poor network
performance and triggers the "bnx2" error on kern.log at host (every
single click on pfsense's webgui, triggers this error on host!). Sorry
about the buzz...

Best,
Thiago

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https://bugs.launchpad.net/bugs/1014350

Title:
  WARNING: at /build/buildd/linux-3.2.0/net/core/dev.c:1960
  skb_gso_segment+0x341/0x3b0()

Status in “linux” package in Ubuntu:
  Invalid

Bug description:
  we have IBM 3650  with 12.04 amd64 server as a kvm virtualization and
  kern.log is suddenly fill at dramatic rate with this warning.  system
  work normaly for a while and problem start five days ago. any help?

  WORKAROUND: We have several freebsd 9 amd64 guests with virtio network
  drivers. After changing net drv to e1000 the problem disappears.

  [29955.815267] WARNING: at /build/buildd/linux-3.2.0/net/core/dev.c:1980 skb_gso_segment+0x341/0x3b0()
  [29955.815269] Hardware name: IBM System x3650 -[7979KPG]-
  [29955.815272] 802.1Q VLAN Support: caps=(0x30095823, 0x0) len=1925 data_len=0 ip_summed=0
  [29955.815275] Modules linked in: 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 nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc bridge 8021q garp stp radeon ttm ibmpex drm_kms_helper shpchp ibmaem ipmi_msghandler ics932s401 psmouse drm serio_raw i2c_algo_bit i5000_edac edac_core i5k_amb ioatdma mac_hid dca lp parport ses enclosure bnx2 aacraid
  [29955.815312] Pid: 7912, comm: kvm Tainted: G        W    3.2.0-25-generic #40-Ubuntu
  [29955.815314] Call Trace:
  [29955.815316]  <IRQ>  [<ffffffff810672af>] warn_slowpath_common+0x7f/0xc0
  [29955.815322]  [<ffffffff810673a6>] warn_slowpath_fmt+0x46/0x50
  [29955.815326]  [<ffffffff8153ebd1>] skb_gso_segment+0x341/0x3b0
  [29955.815330]  [<ffffffff8105695e>] ? update_curr+0x21e/0x230
  [29955.815335]  [<ffffffff8154234a>] dev_hard_start_xmit+0x11a/0x580
  [29955.815341]  [<ffffffffa021c150>] ? br_flood+0xc0/0xc0 [bridge]
  [29955.815345]  [<ffffffff81542a5a>] dev_queue_xmit+0x2aa/0x420
  [29955.815350]  [<ffffffffa021c1bc>] br_dev_queue_push_xmit+0x6c/0xa0 [bridge]
  [29955.815356]  [<ffffffffa021c248>] br_forward_finish+0x58/0x60 [bridge]
  [29955.815361]  [<ffffffffa021c3fb>] __br_forward+0xab/0xd0 [bridge]
  [29955.815367]  [<ffffffffa021c4bd>] br_forward+0x5d/0x70 [bridge]
  [29955.815372]  [<ffffffffa021d182>] br_handle_frame_finish+0x182/0x2a0 [bridge]
  [29955.815378]  [<ffffffffa021d468>] br_handle_frame+0x1c8/0x270 [bridge]
  [29955.815384]  [<ffffffffa021d2a0>] ? br_handle_frame_finish+0x2a0/0x2a0 [bridge]
  [29955.815388]  [<ffffffff8153fd82>] __netif_receive_skb+0x1e2/0x520
  [29955.815391]  [<ffffffff815404e1>] process_backlog+0xb1/0x190
  [29955.815395]  [<ffffffff815417d4>] net_rx_action+0x134/0x290
  [29955.815399]  [<ffffffff8106ea58>] __do_softirq+0xa8/0x210
  [29955.815402]  [<ffffffff81667eac>] call_softirq+0x1c/0x30
  [29955.815404]  <EOI>  [<ffffffff81015305>] do_softirq+0x65/0xa0
  [29955.815410]  [<ffffffff81541cb8>] netif_rx_ni+0x28/0x30
  [29955.815414]  [<ffffffff814787c6>] tun_get_user+0x306/0x4a0
  [29955.815417]  [<ffffffff81479ca4>] tun_chr_aio_write+0x64/0x90
  [29955.815421]  [<ffffffff81479c40>] ? tun_chr_aio_read+0xd0/0xd0
  [29955.815424]  [<ffffffff811784c3>] do_sync_readv_writev+0xd3/0x110
  [29955.815428]  [<ffffffff812d7768>] ? apparmor_file_permission+0x18/0x20
  [29955.815431]  [<ffffffff8129cefc>] ? security_file_permission+0x2c/0xb0
  [29955.815435]  [<ffffffff81177bc1>] ? rw_verify_area+0x61/0xf0
  [29955.815438]  [<ffffffff81178794>] do_readv_writev+0xd4/0x1d0
  [29955.815441]  [<ffffffff811be755>] ? eventfd_ctx_read+0x1a5/0x210
  [29955.815445]  [<ffffffff811788cc>] vfs_writev+0x3c/0x50
  [29955.815447]  [<ffffffff81178a2a>] sys_writev+0x4a/0xb0
  [29955.815451]  [<ffffffff81665c42>] system_call_fastpath+0x16/0x1b
  [29955.815453] ---[ end trace 33dfb9cf0396c073 ]---

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