https://bugzilla.novell.com/show_bug.cgi?id=656107
https://bugzilla.novell.com/show_bug.cgi?id=656107#c0
Summary: kernel spits out a lot of WARNING messages about
skb_gso_segment on tun/tap device
Classification: openSUSE
Product: openSUSE 11.3
Version: Final
Platform: x86-64
OS/Version: openSUSE 11.3
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Kernel
AssignedTo: kernel-maintainers@forge.provo.novell.com
ReportedBy: mendel@mobach.nl
QAContact: qa@suse.de
Found By: ---
Blocker: ---
User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.12)
Gecko/20101026 SUSE/3.6.12-0.7.1 Firefox/3.6.12
I'm running a xen server with 2 windows virtual machines, 1 of them is running
win2k8 with xen drivers, the other is a plain win2k3 in qemu with qemu drivers.
Both are on the same network (bridge) in xen.
When transferring data between them the kernel spits out a lot of error
messages about the tun driver (responsible for tap3.0, win2k3 is running with
xen domain ID 3).
I can reproduce the same problem with HVM virtualized linux virtual machines.
Nov 26 14:26:37 xen1 kernel: [ 8704.028410] ------------[ cut here
]------------
Nov 26 14:26:37 xen1 kernel: [ 8704.028428] WARNING: at
/usr/src/packages/BUILD/kernel-xen-2.6.34.7/linux-2.6.34/net/core/dev.c:1748
skb_gso_segment+0x1a9/0x270()
Nov 26 14:26:37 xen1 kernel: [ 8704.028434] Hardware name: H8DM8-2
Nov 26 14:26:37 xen1 kernel: [ 8704.028439] tun: caps=(0x0, 0x0) len=8500
data_len=8450 ip_summed=0
Nov 26 14:26:37 xen1 kernel: [ 8704.028443] Modules linked in: tun crc32c usbbk
gntdev netbk blkbk blkback_pagemap blktap domctl xenbus_be evtchn edd ib_iser
rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp
libiscsi scsi_transport_iscsi 8021q garp af_packet bridge stp llc loop dm_mod
e1000 8250_pnp 8250 sg i2c_nforce2 usb_storage k10temp pcspkr joydev sr_mod
shpchp serio_raw pci_hotplug serial_core forcedeth button reiserfs usbhid hid
radeon ttm drm_kms_helper ohci_hcd sd_mod drm agpgart i2c_algo_bit i2c_core
ehci_hcd usbcore xenblk cdrom xennet fan processor ata_generic arcmsr pata_amd
libata scsi_mod thermal thermal_sys hwmon
Nov 26 14:26:37 xen1 kernel: [ 8704.028532] Pid: 8513, comm: netback/0 Tainted:
G W 2.6.34.7-0.5-xen #1
Nov 26 14:26:37 xen1 kernel: [ 8704.028536] Call Trace:
Nov 26 14:26:37 xen1 kernel: [ 8704.028558] [<ffffffff80009646>]
dump_trace+0x76/0x1a0
Nov 26 14:26:37 xen1 kernel: [ 8704.028569] [<ffffffff8040b286>]
dump_stack+0x69/0x6f
Nov 26 14:26:37 xen1 kernel: [ 8704.028581] [<ffffffff80043943>]
warn_slowpath_common+0x73/0xb0
Nov 26 14:26:37 xen1 kernel: [ 8704.028591] [<ffffffff800439e0>]
warn_slowpath_fmt+0x40/0x50
Nov 26 14:26:37 xen1 kernel: [ 8704.028602] [<ffffffff80333799>]
skb_gso_segment+0x1a9/0x270
Nov 26 14:26:37 xen1 kernel: [ 8704.028617] [<ffffffff803375db>]
dev_hard_start_xmit+0x8b/0x220
Nov 26 14:26:37 xen1 kernel: [ 8704.028628] [<ffffffff8034dcb6>]
sch_direct_xmit+0x136/0x1f0
Nov 26 14:26:37 xen1 kernel: [ 8704.028642] [<ffffffff80337add>]
dev_queue_xmit+0x36d/0x630
Nov 26 14:26:37 xen1 kernel: [ 8704.028659] [<ffffffffa04ce31f>]
br_dev_queue_push_xmit+0x5f/0x80 [bridge]
Nov 26 14:26:37 xen1 kernel: [ 8704.028685] [<ffffffffa04cf33b>]
br_handle_frame_finish+0x12b/0x270 [bridge]
Nov 26 14:26:37 xen1 kernel: [ 8704.028704] [<ffffffffa04cf60a>]
br_handle_frame+0x18a/0x210 [bridge]
Nov 26 14:26:37 xen1 kernel: [ 8704.028732] [<ffffffff803345b3>]
netif_receive_skb+0x1f3/0x630
Nov 26 14:26:37 xen1 kernel: [ 8704.028742] [<ffffffff80334a84>]
process_backlog+0x94/0x110
Nov 26 14:26:37 xen1 kernel: [ 8704.028751] [<ffffffff80334de9>]
net_rx_action+0x189/0x2a0
Nov 26 14:26:37 xen1 kernel: [ 8704.028762] [<ffffffff8004b8c8>]
__do_softirq+0xe8/0x220
Nov 26 14:26:37 xen1 kernel: [ 8704.028773] [<ffffffff80007efc>]
call_softirq+0x1c/0x30
Nov 26 14:26:37 xen1 kernel: [ 8704.028782] [<ffffffff80009595>]
do_softirq+0xa5/0xe0
Nov 26 14:26:37 xen1 kernel: [ 8704.028793] [<ffffffff8033595e>]
netif_rx_ni+0x1e/0x30
Nov 26 14:26:37 xen1 kernel: [ 8704.028807] [<ffffffffa063224d>]
net_tx_action+0xc7d/0x1060 [netbk]
Nov 26 14:26:37 xen1 kernel: [ 8704.028829] [<ffffffffa06326bb>]
netbk_action_thread+0x8b/0x1f0 [netbk]
Nov 26 14:26:37 xen1 kernel: [ 8704.028842] [<ffffffff80063f2e>]
kthread+0x8e/0xa0
Nov 26 14:26:37 xen1 kernel: [ 8704.028852] [<ffffffff80007e04>]
kernel_thread_helper+0x4/0x10
Nov 26 14:26:37 xen1 kernel: [ 8704.028862] ---[ end trace 936a382869728b35
]---
Reproducible: Always
Steps to Reproduce:
1. Setup xen with 1 VM running in qemu (HVM) and install no special drivers
2. Setup 1 other VM on the same network bridge
3. Generate load (copy data between them, a few MB's will do)
4. Watch /var/log/messages
Actual Results:
/var/log/messages overfills with warning messages. This takes generates some
load on the server.
Expected Results:
No WARNING messages every few packets. A nice and clean operational mode.
xen1:~ # uname -a
Linux xen1 2.6.34.7-0.5-xen #1 SMP 2010-10-25 08:40:12 +0200 x86_64 x86_64
x86_64 GNU/Linux
xen1:~ # rpm -q xen kernel-xen
xen-4.0.0_21091_06-0.1.1.x86_64
kernel-xen-2.6.34.7-0.5.1.x86_64
xen1:~ # xm info
host : xen1
release : 2.6.34.7-0.5-xen
version : #1 SMP 2010-10-25 08:40:12 +0200
machine : x86_64
nr_cpus : 4
nr_nodes : 1
cores_per_socket : 4
threads_per_core : 1
cpu_mhz : 2110
hw_caps :
178bf3ff:efd3fbff:00000000:00001310:00802001:00000000:000007ff:00000000
virt_caps : hvm
total_memory : 8155
free_memory : 12
free_cpus : 0
max_free_memory : 2415
max_para_memory : 2411
max_hvm_memory : 2397
node_to_cpu : node0:0-3
node_to_memory : node0:12
node_to_dma32_mem : node0:12
max_node_id : 0
xen_major : 4
xen_minor : 0
xen_extra : .0_21091_06-0.1
xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler : credit
xen_pagesize : 4096
platform_params : virt_start=0xffff800000000000
xen_changeset : 21091
xen_commandline : com2=115200,8n1 console=com2 noapic
cc_compiler : gcc version 4.5.0 20100604 [gcc-4_5-branch revision
160292] (SU
cc_compile_by : abuild
cc_compile_domain :
cc_compile_date : Mon Aug 23 23:39:48 UTC 2010
xend_config_format : 4
xen1:~ # modinfo tun
filename: /lib/modules/2.6.34.7-0.5-xen/kernel/drivers/net/tun.ko
alias: devname:net/tun
alias: char-major-10-200
license: GPL
author: (C) 1999-2004 Max Krasnyansky
description: Universal TUN/TAP device driver
srcversion: 2A94B20FBF616317749DCF9
depends:
vermagic: 2.6.34.7-0.5-xen SMP mod_unload modversions Xen
xen1:~ # brctl show
bridge name bridge id STP enabled interfaces
br1200 8000.001b212462ac no tap3.0
tap6.0
vif3.0
vif6.0
vlan1200
Just one second of logs:
Nov 26 14:26:36 xen1 kernel: [ 8702.918349] ------------[ cut here
]------------
Nov 26 14:26:36 xen1 kernel: [ 8702.918368] WARNING: at
/usr/src/packages/BUILD/kernel-xen-2.6.34.7/linux-2.6.34/net/core/dev.c:1748
skb_gso_segment+0x1a9/0x270()
Nov 26 14:26:36 xen1 kernel: [ 8702.918374] Hardware name: H8DM8-2
Nov 26 14:26:36 xen1 kernel: [ 8702.918379] tun: caps=(0x0, 0x0) len=16492
data_len=16442 ip_summed=0
Nov 26 14:26:36 xen1 kernel: [ 8702.918383] Modules linked in: tun crc32c usbbk
gntdev netbk blkbk blkback_pagemap blktap domctl xenbus_be evtchn edd ib_iser
rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp
libiscsi scsi_transport_iscsi 8021q garp af_packet bridge stp llc loop dm_mod
e1000 8250_pnp 8250 sg i2c_nforce2 usb_storage k10temp pcspkr joydev sr_mod
shpchp serio_raw pci_hotplug serial_core forcedeth button reiserfs usbhid hid
radeon ttm drm_kms_helper ohci_hcd sd_mod drm agpgart i2c_algo_bit i2c_core
ehci_hcd usbcore xenblk cdrom xennet fan processor ata_generic arcmsr pata_amd
libata scsi_mod thermal thermal_sys hwmon
Nov 26 14:26:36 xen1 kernel: [ 8702.918472] Pid: 8513, comm: netback/0 Tainted:
G W 2.6.34.7-0.5-xen #1
Nov 26 14:26:36 xen1 kernel: [ 8702.918477] Call Trace:
Nov 26 14:26:36 xen1 kernel: [ 8702.918499] [<ffffffff80009646>]
dump_trace+0x76/0x1a0
Nov 26 14:26:36 xen1 kernel: [ 8702.918511] [<ffffffff8040b286>]
dump_stack+0x69/0x6f
Nov 26 14:26:36 xen1 kernel: [ 8702.918523] [<ffffffff80043943>]
warn_slowpath_common+0x73/0xb0
Nov 26 14:26:36 xen1 kernel: [ 8702.918532] [<ffffffff800439e0>]
warn_slowpath_fmt+0x40/0x50
Nov 26 14:26:36 xen1 kernel: [ 8702.918543] [<ffffffff80333799>]
skb_gso_segment+0x1a9/0x270
Nov 26 14:26:36 xen1 kernel: [ 8702.918559] [<ffffffff803375db>]
dev_hard_start_xmit+0x8b/0x220
Nov 26 14:26:36 xen1 kernel: [ 8702.918569] [<ffffffff8034dcb6>]
sch_direct_xmit+0x136/0x1f0
Nov 26 14:26:36 xen1 kernel: [ 8702.918583] [<ffffffff80337add>]
dev_queue_xmit+0x36d/0x630
Nov 26 14:26:36 xen1 kernel: [ 8702.918600] [<ffffffffa04ce31f>]
br_dev_queue_push_xmit+0x5f/0x80 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8702.918626] [<ffffffffa04cf33b>]
br_handle_frame_finish+0x12b/0x270 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8702.918645] [<ffffffffa04cf60a>]
br_handle_frame+0x18a/0x210 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8702.918670] [<ffffffff803345b3>]
netif_receive_skb+0x1f3/0x630
Nov 26 14:26:36 xen1 kernel: [ 8702.918680] [<ffffffff80334a84>]
process_backlog+0x94/0x110
Nov 26 14:26:36 xen1 kernel: [ 8702.918689] [<ffffffff80334de9>]
net_rx_action+0x189/0x2a0
Nov 26 14:26:36 xen1 kernel: [ 8702.918700] [<ffffffff8004b8c8>]
__do_softirq+0xe8/0x220
Nov 26 14:26:36 xen1 kernel: [ 8702.918711] [<ffffffff80007efc>]
call_softirq+0x1c/0x30
Nov 26 14:26:36 xen1 kernel: [ 8702.918720] [<ffffffff80009595>]
do_softirq+0xa5/0xe0
Nov 26 14:26:36 xen1 kernel: [ 8702.918731] [<ffffffff8033595e>]
netif_rx_ni+0x1e/0x30
Nov 26 14:26:36 xen1 kernel: [ 8702.918744] [<ffffffffa063224d>]
net_tx_action+0xc7d/0x1060 [netbk]
Nov 26 14:26:36 xen1 kernel: [ 8702.918765] [<ffffffffa06326bb>]
netbk_action_thread+0x8b/0x1f0 [netbk]
Nov 26 14:26:36 xen1 kernel: [ 8702.918779] [<ffffffff80063f2e>]
kthread+0x8e/0xa0
Nov 26 14:26:36 xen1 kernel: [ 8702.918789] [<ffffffff80007e04>]
kernel_thread_helper+0x4/0x10
Nov 26 14:26:36 xen1 kernel: [ 8702.918799] ---[ end trace 936a382869728b2f
]---
Nov 26 14:26:36 xen1 kernel: [ 8703.323928] ------------[ cut here
]------------
Nov 26 14:26:36 xen1 kernel: [ 8703.323947] WARNING: at
/usr/src/packages/BUILD/kernel-xen-2.6.34.7/linux-2.6.34/net/core/dev.c:1748
skb_gso_segment+0x1a9/0x270()
Nov 26 14:26:36 xen1 kernel: [ 8703.323953] Hardware name: H8DM8-2
Nov 26 14:26:36 xen1 kernel: [ 8703.323958] tun: caps=(0x0, 0x0) len=5440
data_len=5390 ip_summed=0
Nov 26 14:26:36 xen1 kernel: [ 8703.323962] Modules linked in: tun crc32c usbbk
gntdev netbk blkbk blkback_pagemap blktap domctl xenbus_be evtchn edd ib_iser
rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp
libiscsi scsi_transport_iscsi 8021q garp af_packet bridge stp llc loop dm_mod
e1000 8250_pnp 8250 sg i2c_nforce2 usb_storage k10temp pcspkr joydev sr_mod
shpchp serio_raw pci_hotplug serial_core forcedeth button reiserfs usbhid hid
radeon ttm drm_kms_helper ohci_hcd sd_mod drm agpgart i2c_algo_bit i2c_core
ehci_hcd usbcore xenblk cdrom xennet fan processor ata_generic arcmsr pata_amd
libata scsi_mod thermal thermal_sys hwmon
Nov 26 14:26:36 xen1 kernel: [ 8703.324073] Pid: 8513, comm: netback/0 Tainted:
G W 2.6.34.7-0.5-xen #1
Nov 26 14:26:36 xen1 kernel: [ 8703.324080] Call Trace:
Nov 26 14:26:36 xen1 kernel: [ 8703.324106] [<ffffffff80009646>]
dump_trace+0x76/0x1a0
Nov 26 14:26:36 xen1 kernel: [ 8703.324127] [<ffffffff8040b286>]
dump_stack+0x69/0x6f
Nov 26 14:26:36 xen1 kernel: [ 8703.324147] [<ffffffff80043943>]
warn_slowpath_common+0x73/0xb0
Nov 26 14:26:36 xen1 kernel: [ 8703.324165] [<ffffffff800439e0>]
warn_slowpath_fmt+0x40/0x50
Nov 26 14:26:36 xen1 kernel: [ 8703.324177] [<ffffffff80333799>]
skb_gso_segment+0x1a9/0x270
Nov 26 14:26:36 xen1 kernel: [ 8703.324193] [<ffffffff803375db>]
dev_hard_start_xmit+0x8b/0x220
Nov 26 14:26:36 xen1 kernel: [ 8703.324251] [<ffffffff8034dcb6>]
sch_direct_xmit+0x136/0x1f0
Nov 26 14:26:36 xen1 kernel: [ 8703.324270] [<ffffffff80337add>]
dev_queue_xmit+0x36d/0x630
Nov 26 14:26:36 xen1 kernel: [ 8703.324295] [<ffffffffa04ce31f>]
br_dev_queue_push_xmit+0x5f/0x80 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8703.324329] [<ffffffffa04cf33b>]
br_handle_frame_finish+0x12b/0x270 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8703.324357] [<ffffffffa04cf60a>]
br_handle_frame+0x18a/0x210 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8703.324380] [<ffffffff803345b3>]
netif_receive_skb+0x1f3/0x630
Nov 26 14:26:36 xen1 kernel: [ 8703.324397] [<ffffffff80334a84>]
process_backlog+0x94/0x110
Nov 26 14:26:36 xen1 kernel: [ 8703.324414] [<ffffffff80334de9>]
net_rx_action+0x189/0x2a0
Nov 26 14:26:36 xen1 kernel: [ 8703.324433] [<ffffffff8004b8c8>]
__do_softirq+0xe8/0x220
Nov 26 14:26:36 xen1 kernel: [ 8703.324451] [<ffffffff80007efc>]
call_softirq+0x1c/0x30
Nov 26 14:26:36 xen1 kernel: [ 8703.324467] [<ffffffff80009595>]
do_softirq+0xa5/0xe0
Nov 26 14:26:36 xen1 kernel: [ 8703.324481] [<ffffffff8033595e>]
netif_rx_ni+0x1e/0x30
Nov 26 14:26:36 xen1 kernel: [ 8703.324500] [<ffffffffa063224d>]
net_tx_action+0xc7d/0x1060 [netbk]
Nov 26 14:26:36 xen1 kernel: [ 8703.324524] [<ffffffffa06326bb>]
netbk_action_thread+0x8b/0x1f0 [netbk]
Nov 26 14:26:36 xen1 kernel: [ 8703.324538] [<ffffffff80063f2e>]
kthread+0x8e/0xa0
Nov 26 14:26:36 xen1 kernel: [ 8703.324548] [<ffffffff80007e04>]
kernel_thread_helper+0x4/0x10
Nov 26 14:26:36 xen1 kernel: [ 8703.324558] ---[ end trace 936a382869728b30
]---
Nov 26 14:26:36 xen1 kernel: [ 8703.430034] ------------[ cut here
]------------
Nov 26 14:26:36 xen1 kernel: [ 8703.430052] WARNING: at
/usr/src/packages/BUILD/kernel-xen-2.6.34.7/linux-2.6.34/net/core/dev.c:1748
skb_gso_segment+0x1a9/0x270()
Nov 26 14:26:36 xen1 kernel: [ 8703.430058] Hardware name: H8DM8-2
Nov 26 14:26:36 xen1 kernel: [ 8703.430062] tun: caps=(0x0, 0x0) len=10820
data_len=10770 ip_summed=0
Nov 26 14:26:36 xen1 kernel: [ 8703.430066] Modules linked in: tun crc32c usbbk
gntdev netbk blkbk blkback_pagemap blktap domctl xenbus_be evtchn edd ib_iser
rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp
libiscsi scsi_transport_iscsi 8021q garp af_packet bridge stp llc loop dm_mod
e1000 8250_pnp 8250 sg i2c_nforce2 usb_storage k10temp pcspkr joydev sr_mod
shpchp serio_raw pci_hotplug serial_core forcedeth button reiserfs usbhid hid
radeon ttm drm_kms_helper ohci_hcd sd_mod drm agpgart i2c_algo_bit i2c_core
ehci_hcd usbcore xenblk cdrom xennet fan processor ata_generic arcmsr pata_amd
libata scsi_mod thermal thermal_sys hwmon
Nov 26 14:26:36 xen1 kernel: [ 8703.430155] Pid: 8513, comm: netback/0 Tainted:
G W 2.6.34.7-0.5-xen #1
Nov 26 14:26:36 xen1 kernel: [ 8703.430159] Call Trace:
Nov 26 14:26:36 xen1 kernel: [ 8703.430180] [<ffffffff80009646>]
dump_trace+0x76/0x1a0
Nov 26 14:26:36 xen1 kernel: [ 8703.430190] [<ffffffff8040b286>]
dump_stack+0x69/0x6f
Nov 26 14:26:36 xen1 kernel: [ 8703.430202] [<ffffffff80043943>]
warn_slowpath_common+0x73/0xb0
Nov 26 14:26:36 xen1 kernel: [ 8703.430211] [<ffffffff800439e0>]
warn_slowpath_fmt+0x40/0x50
Nov 26 14:26:36 xen1 kernel: [ 8703.430219] [<ffffffff80333799>]
skb_gso_segment+0x1a9/0x270
Nov 26 14:26:36 xen1 kernel: [ 8703.430235] [<ffffffff803375db>]
dev_hard_start_xmit+0x8b/0x220
Nov 26 14:26:36 xen1 kernel: [ 8703.430245] [<ffffffff8034dcb6>]
sch_direct_xmit+0x136/0x1f0
Nov 26 14:26:36 xen1 kernel: [ 8703.430259] [<ffffffff80337add>]
dev_queue_xmit+0x36d/0x630
Nov 26 14:26:36 xen1 kernel: [ 8703.430276] [<ffffffffa04ce31f>]
br_dev_queue_push_xmit+0x5f/0x80 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8703.430302] [<ffffffffa04cf33b>]
br_handle_frame_finish+0x12b/0x270 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8703.430321] [<ffffffffa04cf60a>]
br_handle_frame+0x18a/0x210 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8703.430349] [<ffffffff803345b3>]
netif_receive_skb+0x1f3/0x630
Nov 26 14:26:36 xen1 kernel: [ 8703.430358] [<ffffffff80334a84>]
process_backlog+0x94/0x110
Nov 26 14:26:36 xen1 kernel: [ 8703.430367] [<ffffffff80334de9>]
net_rx_action+0x189/0x2a0
Nov 26 14:26:36 xen1 kernel: [ 8703.430378] [<ffffffff8004b8c8>]
__do_softirq+0xe8/0x220
Nov 26 14:26:36 xen1 kernel: [ 8703.430389] [<ffffffff80007efc>]
call_softirq+0x1c/0x30
Nov 26 14:26:36 xen1 kernel: [ 8703.430397] [<ffffffff80009595>]
do_softirq+0xa5/0xe0
Nov 26 14:26:36 xen1 kernel: [ 8703.430408] [<ffffffff8033595e>]
netif_rx_ni+0x1e/0x30
Nov 26 14:26:36 xen1 kernel: [ 8703.430422] [<ffffffffa063224d>]
net_tx_action+0xc7d/0x1060 [netbk]
Nov 26 14:26:36 xen1 kernel: [ 8703.430443] [<ffffffffa06326bb>]
netbk_action_thread+0x8b/0x1f0 [netbk]
Nov 26 14:26:36 xen1 kernel: [ 8703.430456] [<ffffffff80063f2e>]
kthread+0x8e/0xa0
Nov 26 14:26:36 xen1 kernel: [ 8703.430466] [<ffffffff80007e04>]
kernel_thread_helper+0x4/0x10
Nov 26 14:26:36 xen1 kernel: [ 8703.430476] ---[ end trace 936a382869728b31
]---
Nov 26 14:26:36 xen1 kernel: [ 8703.488601] ------------[ cut here
]------------
Nov 26 14:26:36 xen1 kernel: [ 8703.488620] WARNING: at
/usr/src/packages/BUILD/kernel-xen-2.6.34.7/linux-2.6.34/net/core/dev.c:1748
skb_gso_segment+0x1a9/0x270()
Nov 26 14:26:36 xen1 kernel: [ 8703.488625] Hardware name: H8DM8-2
Nov 26 14:26:36 xen1 kernel: [ 8703.488630] tun: caps=(0x0, 0x0) len=11312
data_len=11262 ip_summed=0
Nov 26 14:26:36 xen1 kernel: [ 8703.488634] Modules linked in: tun crc32c usbbk
gntdev netbk blkbk blkback_pagemap blktap domctl xenbus_be evtchn edd ib_iser
rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp
libiscsi scsi_transport_iscsi 8021q garp af_packet bridge stp llc loop dm_mod
e1000 8250_pnp 8250 sg i2c_nforce2 usb_storage k10temp pcspkr joydev sr_mod
shpchp serio_raw pci_hotplug serial_core forcedeth button reiserfs usbhid hid
radeon ttm drm_kms_helper ohci_hcd sd_mod drm agpgart i2c_algo_bit i2c_core
ehci_hcd usbcore xenblk cdrom xennet fan processor ata_generic arcmsr pata_amd
libata scsi_mod thermal thermal_sys hwmon
Nov 26 14:26:36 xen1 kernel: [ 8703.488722] Pid: 8513, comm: netback/0 Tainted:
G W 2.6.34.7-0.5-xen #1
Nov 26 14:26:36 xen1 kernel: [ 8703.488727] Call Trace:
Nov 26 14:26:36 xen1 kernel: [ 8703.488747] [<ffffffff80009646>]
dump_trace+0x76/0x1a0
Nov 26 14:26:36 xen1 kernel: [ 8703.488758] [<ffffffff8040b286>]
dump_stack+0x69/0x6f
Nov 26 14:26:36 xen1 kernel: [ 8703.488769] [<ffffffff80043943>]
warn_slowpath_common+0x73/0xb0
Nov 26 14:26:36 xen1 kernel: [ 8703.488778] [<ffffffff800439e0>]
warn_slowpath_fmt+0x40/0x50
Nov 26 14:26:36 xen1 kernel: [ 8703.488789] [<ffffffff80333799>]
skb_gso_segment+0x1a9/0x270
Nov 26 14:26:36 xen1 kernel: [ 8703.488804] [<ffffffff803375db>]
dev_hard_start_xmit+0x8b/0x220
Nov 26 14:26:36 xen1 kernel: [ 8703.488814] [<ffffffff8034dcb6>]
sch_direct_xmit+0x136/0x1f0
Nov 26 14:26:36 xen1 kernel: [ 8703.488829] [<ffffffff80337add>]
dev_queue_xmit+0x36d/0x630
Nov 26 14:26:36 xen1 kernel: [ 8703.488845] [<ffffffffa04ce31f>]
br_dev_queue_push_xmit+0x5f/0x80 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8703.488870] [<ffffffffa04cf33b>]
br_handle_frame_finish+0x12b/0x270 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8703.488889] [<ffffffffa04cf60a>]
br_handle_frame+0x18a/0x210 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8703.488917] [<ffffffff803345b3>]
netif_receive_skb+0x1f3/0x630
Nov 26 14:26:36 xen1 kernel: [ 8703.488926] [<ffffffff80334a84>]
process_backlog+0x94/0x110
Nov 26 14:26:36 xen1 kernel: [ 8703.488936] [<ffffffff80334de9>]
net_rx_action+0x189/0x2a0
Nov 26 14:26:36 xen1 kernel: [ 8703.488947] [<ffffffff8004b8c8>]
__do_softirq+0xe8/0x220
Nov 26 14:26:36 xen1 kernel: [ 8703.488958] [<ffffffff80007efc>]
call_softirq+0x1c/0x30
Nov 26 14:26:36 xen1 kernel: [ 8703.488966] [<ffffffff80009595>]
do_softirq+0xa5/0xe0
Nov 26 14:26:36 xen1 kernel: [ 8703.488977] [<ffffffff8033595e>]
netif_rx_ni+0x1e/0x30
Nov 26 14:26:36 xen1 kernel: [ 8703.488991] [<ffffffffa063224d>]
net_tx_action+0xc7d/0x1060 [netbk]
Nov 26 14:26:36 xen1 kernel: [ 8703.489012] [<ffffffffa06326bb>]
netbk_action_thread+0x8b/0x1f0 [netbk]
Nov 26 14:26:36 xen1 kernel: [ 8703.489025] [<ffffffff80063f2e>]
kthread+0x8e/0xa0
Nov 26 14:26:36 xen1 kernel: [ 8703.489035] [<ffffffff80007e04>]
kernel_thread_helper+0x4/0x10
Nov 26 14:26:36 xen1 kernel: [ 8703.489045] ---[ end trace 936a382869728b32
]---
Nov 26 14:26:36 xen1 kernel: [ 8703.538988] ------------[ cut here
]------------
Nov 26 14:26:36 xen1 kernel: [ 8703.539013] WARNING: at
/usr/src/packages/BUILD/kernel-xen-2.6.34.7/linux-2.6.34/net/core/dev.c:1748
skb_gso_segment+0x1a9/0x270()
Nov 26 14:26:36 xen1 kernel: [ 8703.539028] Hardware name: H8DM8-2
Nov 26 14:26:36 xen1 kernel: [ 8703.539033] tun: caps=(0x0, 0x0) len=4900
data_len=4850 ip_summed=0
Nov 26 14:26:36 xen1 kernel: [ 8703.539036] Modules linked in: tun crc32c usbbk
gntdev netbk blkbk blkback_pagemap blktap domctl xenbus_be evtchn edd ib_iser
rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp
libiscsi scsi_transport_iscsi 8021q garp af_packet bridge stp llc loop dm_mod
e1000 8250_pnp 8250 sg i2c_nforce2 usb_storage k10temp pcspkr joydev sr_mod
shpchp serio_raw pci_hotplug serial_core forcedeth button reiserfs usbhid hid
radeon ttm drm_kms_helper ohci_hcd sd_mod drm agpgart i2c_algo_bit i2c_core
ehci_hcd usbcore xenblk cdrom xennet fan processor ata_generic arcmsr pata_amd
libata scsi_mod thermal thermal_sys hwmon
Nov 26 14:26:36 xen1 kernel: [ 8703.539124] Pid: 8513, comm: netback/0 Tainted:
G W 2.6.34.7-0.5-xen #1
Nov 26 14:26:36 xen1 kernel: [ 8703.539129] Call Trace:
Nov 26 14:26:36 xen1 kernel: [ 8703.539150] [<ffffffff80009646>]
dump_trace+0x76/0x1a0
Nov 26 14:26:36 xen1 kernel: [ 8703.539161] [<ffffffff8040b286>]
dump_stack+0x69/0x6f
Nov 26 14:26:36 xen1 kernel: [ 8703.539173] [<ffffffff80043943>]
warn_slowpath_common+0x73/0xb0
Nov 26 14:26:36 xen1 kernel: [ 8703.539182] [<ffffffff800439e0>]
warn_slowpath_fmt+0x40/0x50
Nov 26 14:26:36 xen1 kernel: [ 8703.539194] [<ffffffff80333799>]
skb_gso_segment+0x1a9/0x270
Nov 26 14:26:36 xen1 kernel: [ 8703.539207] [<ffffffff803375db>]
dev_hard_start_xmit+0x8b/0x220
Nov 26 14:26:36 xen1 kernel: [ 8703.539217] [<ffffffff8034dcb6>]
sch_direct_xmit+0x136/0x1f0
Nov 26 14:26:36 xen1 kernel: [ 8703.539227] [<ffffffff80337add>]
dev_queue_xmit+0x36d/0x630
Nov 26 14:26:36 xen1 kernel: [ 8703.539245] [<ffffffffa04ce31f>]
br_dev_queue_push_xmit+0x5f/0x80 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8703.539269] [<ffffffffa04cf33b>]
br_handle_frame_finish+0x12b/0x270 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8703.539288] [<ffffffffa04cf60a>]
br_handle_frame+0x18a/0x210 [bridge]
Nov 26 14:26:36 xen1 kernel: [ 8703.539306] [<ffffffff803345b3>]
netif_receive_skb+0x1f3/0x630
Nov 26 14:26:36 xen1 kernel: [ 8703.539316] [<ffffffff80334a84>]
process_backlog+0x94/0x110
Nov 26 14:26:36 xen1 kernel: [ 8703.539325] [<ffffffff80334de9>]
net_rx_action+0x189/0x2a0
Nov 26 14:26:36 xen1 kernel: [ 8703.539336] [<ffffffff8004b8c8>]
__do_softirq+0xe8/0x220
Nov 26 14:26:36 xen1 kernel: [ 8703.539347] [<ffffffff80007efc>]
call_softirq+0x1c/0x30
Nov 26 14:26:36 xen1 kernel: [ 8703.539356] [<ffffffff80009595>]
do_softirq+0xa5/0xe0
Nov 26 14:26:36 xen1 kernel: [ 8703.539366] [<ffffffff8033595e>]
netif_rx_ni+0x1e/0x30
Nov 26 14:26:36 xen1 kernel: [ 8703.539378] [<ffffffffa063224d>]
net_tx_action+0xc7d/0x1060 [netbk]
Nov 26 14:26:36 xen1 kernel: [ 8703.539394] [<ffffffffa06326bb>]
netbk_action_thread+0x8b/0x1f0 [netbk]
Nov 26 14:26:36 xen1 kernel: [ 8703.539407] [<ffffffff80063f2e>]
kthread+0x8e/0xa0
Nov 26 14:26:36 xen1 kernel: [ 8703.539417] [<ffffffff80007e04>]
kernel_thread_helper+0x4/0x10
Nov 26 14:26:36 xen1 kernel: [ 8703.539428] ---[ end trace 936a382869728b33
]---
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