Bug#616441: linux-image-2.6.32-5-xen-686: NETDEV WATCHDOG: usb0 (cdc_subset): transmit queue 0 timed out

2011-03-04 Thread Ferenc Wagner 
Package: linux-2.6
Version: 2.6.32-30
Severity: minor

Hi,

usb0 is a crosslink between two such machines for heartbeat purposes.
The below warning appeared when the node on the other end was executing
a reboot, right after its heartbeat process (reading/writing the other
end of the crosslink) shut down.  It does not happen on each such event,
though, so I can't readily reproduce it, but if may be feasible if
somebody knows what and how to press.  It hasn't got any obvious adverse
effect on the operation of the machines.

Thanks,
Feri.

-- Package-specific info:
** Version:
Linux version 2.6.32-5-xen-686 (Debian 2.6.32-30) (b...@decadent.org.uk) (gcc 
version 4.3.5 (Debian 4.3.5-4) ) #1 SMP Wed Jan 12 07:52:18 UTC 2011

** Command line:
root=/dev/mapper/xen1ha-root ro console=hvc0 earlyprintk=xen 3

** Tainted: W (512)
 * Taint on warning.

** Kernel log:
WARNING: at 
/build/buildd-linux-2.6_2.6.32-30-i386-UYhWt7/linux-2.6-2.6.32/debian/build/source_i386_xen/net/sched/sch_generic.c:261
 dev_watchdog+0xbd/0x15d()
Hardware name: PowerEdge 2650
NETDEV WATCHDOG: usb0 (cdc_subset): transmit queue 0 timed out
Modules linked in: xt_physdev xen_evtchn xenfs crc32c ib_iser rdma_cm ib_cm 
iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi 
scsi_transport_iscsi bridge 8021q garp stp bonding ip6t_REJECT ip6t_LOG 
nf_conntrack_ipv6 ip6table_filter ip6_tables xt_recent ipt_REJECT 
nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack xt_tcpudp ipt_LOG 
xt_limit xt_multiport iptable_filter ip_tables ebtable_filter ebtables x_tables 
ext3 jbd mbcache ipmi_devintf ipmi_si ipmi_msghandler evdev snd_pcm snd_timer 
snd cdc_subset soundcore usbnet dcdbas mii snd_page_alloc pcspkr psmouse 
serio_raw shpchp i2c_piix4 pci_hotplug i2c_core button processor acpi_processor 
xfs exportfs dm_mod raid1 md_mod sd_mod crc_t10dif sg sr_mod cdrom ata_generic 
pata_serverworks ohci_hcd ehci_hcd aic7xxx scsi_transport_spi floppy usbcore 
libata tg3 libphy thermal nls_base thermal_sys scsi_mod [last unloaded: 
scsi_wait_scan]
Pid: 0, comm: swapper Not tainted 2.6.32-5-xen-686 #1
Call Trace:
 [c1037559] ? warn_slowpath_common+0x5e/0x8a
 [c1207e90] ? dev_watchdog+0x0/0x15d
 [c10375b7] ? warn_slowpath_fmt+0x26/0x2a
 [c1207f4d] ? dev_watchdog+0xbd/0x15d
 [c1007465] ? lguest_clockevent_set_next_event+0x0/0x3e
 [c100676f] ? xen_restore_fl_direct_end+0x0/0x1
 [c128ebc1] ? _spin_unlock_irqrestore+0xd/0xf
 [c1006048] ? xen_force_evtchn_callback+0xc/0x10
 [c1006778] ? check_events+0x8/0xc
 [c10422b8] ? run_timer_softirq+0x16a/0x1eb
 [c103c624] ? __do_softirq+0xaa/0x151
 [c103c6fc] ? do_softirq+0x31/0x3c
 [c103c7d2] ? irq_exit+0x26/0x58
 [c119961e] ? xen_evtchn_do_upcall+0x22/0x2c
 [c1009b5f] ? xen_do_upcall+0x7/0xc
 [c10023a7] ? hypercall_page+0x3a7/0x1001
 [c10060c9] ? xen_safe_halt+0xf/0x1b
 [c10041cb] ? xen_idle+0x23/0x30
 [c1008148] ? cpu_idle+0x89/0xa5
---[ end trace 4720259753e3663e ]---

** Model information
not available

** Loaded modules:
Module  Size  Used by
xt_physdev  1228  0 
xen_evtchn  3471  11 
xenfs   7248  1 
crc32c  2172  80 
ib_iser21904  0 
rdma_cm17846  1 ib_iser
ib_cm  22569  1 rdma_cm
iw_cm   5119  1 rdma_cm
ib_sa  13079  2 rdma_cm,ib_cm
ib_mad 26365  2 ib_cm,ib_sa
ib_core33215  6 ib_iser,rdma_cm,ib_cm,iw_cm,ib_sa,ib_mad
ib_addr 4257  1 rdma_cm
iscsi_tcp   6685  34 
libiscsi_tcp9358  1 iscsi_tcp
libiscsi   24462  3 ib_iser,iscsi_tcp,libiscsi_tcp
scsi_transport_iscsi19896  4 ib_iser,iscsi_tcp,libiscsi
bridge 33031  0 
8021q  14114  0 
garp4130  1 8021q
stp  996  2 bridge,garp
bonding65272  0 
ip6t_REJECT 2148  2 
ip6t_LOG3666  3 
nf_conntrack_ipv6   8363  4 
ip6table_filter 1908  1 
ip6_tables  8560  2 ip6t_LOG,ip6table_filter
xt_recent   4885  2 
ipt_REJECT  1517  2 
nf_conntrack_ipv4   7597  4 
nf_defrag_ipv4   779  1 nf_conntrack_ipv4
xt_state 927  8 
nf_conntrack   38079  3 nf_conntrack_ipv6,nf_conntrack_ipv4,xt_state
xt_tcpudp   1743  18 
ipt_LOG 3570  5 
xt_limit1088  8 
xt_multiport1775  10 
iptable_filter  1790  1 
ip_tables   7690  1 iptable_filter
ebtable_filter  1155  0 
ebtables   12237  1 ebtable_filter
x_tables8327  13 
xt_physdev,ip6t_REJECT,ip6t_LOG,ip6_tables,xt_recent,ipt_REJECT,xt_state,xt_tcpudp,ipt_LOG,xt_limit,xt_multiport,ip_tables,ebtables
ext3   94196  1 
jbd32161  1 ext3
mbcache 3762  1 ext3
ipmi_devintf4029  2 
ipmi_si26764  1 
ipmi_msghandler22871  2

Bug#616441: linux-image-2.6.32-5-xen-686: NETDEV WATCHDOG: usb0 (cdc_subset): transmit queue 0 timed out

2011-03-04 Thread Ben Hutchings 
On Fri, Mar 04, 2011 at 03:44:04PM +0100, Ferenc Wagner wrote:
 Package: linux-2.6
 Version: 2.6.32-30
 Severity: minor
 
 Hi,
 
 usb0 is a crosslink between two such machines for heartbeat purposes.
 The below warning appeared when the node on the other end was executing
 a reboot, right after its heartbeat process (reading/writing the other
 end of the crosslink) shut down.  It does not happen on each such event,
 though, so I can't readily reproduce it, but if may be feasible if
 somebody knows what and how to press.  It hasn't got any obvious adverse
 effect on the operation of the machines.

This is quite possibly a hardware bug.  Does the driver successfully
recover after this warning?

You may find it easier to reproduce if you use the packet generator to
send a lot of traffic from machine 1 to machine 2 and the shut down
machine 2.  If that works to reproduce it then the next step would be
to test a more recent kernel version to find out whether it has been
fixed already.

If you cannot find a reliable reproducer, I'm afraid this is unlikely
to be fixed.

Ben.

-- 
Ben Hutchings
We get into the habit of living before acquiring the habit of thinking.
  - Albert Camus



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Bug#616441: linux-image-2.6.32-5-xen-686: NETDEV WATCHDOG: usb0 (cdc_subset): transmit queue 0 timed out

2011-03-04 Thread Ben Hutchings 
On Fri, Mar 04, 2011 at 03:05:39PM +, Ben Hutchings wrote:
 On Fri, Mar 04, 2011 at 03:44:04PM +0100, Ferenc Wagner wrote:
  Package: linux-2.6
  Version: 2.6.32-30
  Severity: minor
  
  Hi,
  
  usb0 is a crosslink between two such machines for heartbeat purposes.
  The below warning appeared when the node on the other end was executing
  a reboot, right after its heartbeat process (reading/writing the other
  end of the crosslink) shut down.  It does not happen on each such event,
  though, so I can't readily reproduce it, but if may be feasible if
  somebody knows what and how to press.  It hasn't got any obvious adverse
  effect on the operation of the machines.
 
 This is quite possibly a hardware bug.  Does the driver successfully
 recover after this warning?
 
 You may find it easier to reproduce if you use the packet generator to
[...]

That's the pktgen module which is documented at
http://www.kernel.org/doc/Documentation/networking/pktgen.txt.

Ben.

-- 
Ben Hutchings
We get into the habit of living before acquiring the habit of thinking.
  - Albert Camus



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