Public bug reported:

using ubuntu Ubuntu 14.04 LTS


we get sporadic networking adapter resets resulting in a loss of service. 
kernel log:


Oct 28 10:57:08 puno01 kernel: [2306272.568264]  ffff881f35400000 
ffff881f37e30940 0000000000000008 0000000000000024
Oct 28 10:57:08 puno01 kernel: [2306272.568274] Call Trace:
Oct 28 10:57:08 puno01 kernel: [2306272.568276]  <IRQ>  [<ffffffff81729f76>] 
dump_stack+0x64/0x82
Oct 28 10:57:08 puno01 kernel: [2306272.568299]  [<ffffffff8106987d>] 
warn_slowpath_common+0x7d/0xa0
Oct 28 10:57:08 puno01 kernel: [2306272.568305]  [<ffffffff810698ec>] 
warn_slowpath_fmt+0x4c/0x50
Oct 28 10:57:08 puno01 kernel: [2306272.568312]  [<ffffffff8164d786>] 
dev_watchdog+0x276/0x280
Oct 28 10:57:08 puno01 kernel: [2306272.568318]  [<ffffffff8164d510>] ? 
dev_graft_qdisc+0x80/0x80
Oct 28 10:57:08 puno01 kernel: [2306272.568327]  [<ffffffff810767d6>] 
call_timer_fn+0x36/0x150
Oct 28 10:57:08 puno01 kernel: [2306272.568332]  [<ffffffff8164d510>] ? 
dev_graft_qdisc+0x80/0x80
Oct 28 10:57:08 puno01 kernel: [2306272.568338]  [<ffffffff810777cf>] 
run_timer_softirq+0x21f/0x310
Oct 28 10:57:08 puno01 kernel: [2306272.568347]  [<ffffffff8106ee9c>] 
__do_softirq+0xfc/0x310
Oct 28 10:57:08 puno01 kernel: [2306272.568354]  [<ffffffff8106f425>] 
irq_exit+0x105/0x110
Oct 28 10:57:08 puno01 kernel: [2306272.568365]  [<ffffffff8143a755>] 
xen_evtchn_do_upcall+0x35/0x50
Oct 28 10:57:08 puno01 kernel: [2306272.568378]  [<ffffffff8173c53e>] 
xen_do_hypervisor_callback+0x1e/0x30
Oct 28 10:57:08 puno01 kernel: [2306272.568380]  <EOI>  [<ffffffff810013aa>] ? 
xen_hypercall_sched_op+0xa/0x20
Oct 28 10:57:08 puno01 kernel: [2306272.568393]  [<ffffffff810013aa>] ? 
xen_hypercall_sched_op+0xa/0x20
Oct 28 10:57:08 puno01 kernel: [2306272.568402]  [<ffffffff8100ad70>] ? 
xen_safe_halt+0x10/0x20
Oct 28 10:57:08 puno01 kernel: [2306272.568414]  [<ffffffff8101daff>] ? 
default_idle+0x1f/0x100
Oct 28 10:57:08 puno01 kernel: [2306272.568420]  [<ffffffff8101e416>] ? 
arch_cpu_idle+0x26/0x30
Oct 28 10:57:08 puno01 kernel: [2306272.568429]  [<ffffffff810c1be1>] ? 
cpu_startup_entry+0xc1/0x2b0
Oct 28 10:57:08 puno01 kernel: [2306272.568438]  [<ffffffff81011178>] ? 
cpu_bringup_and_idle+0x18/0x20
Oct 28 10:57:08 puno01 kernel: [2306272.568441] ---[ end trace 52192aef6937b28d 
]---
Oct 28 10:57:08 puno01 kernel: [2306272.568633] igb 0000:04:00.0 eth0: Reset 
adapter
Oct 28 10:57:08 puno01 kernel: [2306272.586016] xenbr0: port 1(eth0) entered 
disabled state
Oct 28 10:57:08 puno01 kernel: [2306272.600491] igb 0000:04:00.1 eth1: Reset 
adapter
Oct 28 10:57:12 puno01 kernel: [2306276.123402] igb: eth1 NIC Link is Up 1000 
Mbps Full Duplex, Flow Control: RX
:


we moved from kernel 3.13.0-88-generic to 4.4.0-45-generic, but the issue keeps 
reapearing sporadicly (apr 1 - 2 times a month). so the adapter reset happend 
on 

cat /proc/version_signature
Ubuntu 3.13.0-88.135-generic 3.13.11-ckt39


and on 

 cat /proc/version_signature
Ubuntu 4.4.0-45.66~14.04.1-generic 4.4.21


 lspci-vnvn.log are attached.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: trusty

** Attachment added: "lspci-vnvn.log"
   
https://bugs.launchpad.net/bugs/1640856/+attachment/4775414/+files/lspci-vnvn.log

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Title:
  eth0: Reset adapter

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