Comment 0 for bug 1640856

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.