Comment 28 for bug 1469214

Ming was able to help me reliable reproduce this with the command:
  stress-ng --sequential 0 --seq-start 86 --seq-end 90 -t 60 --syslog --metrics --times -v

I prepared a wily package w/ the proposed upstream backport for testing:
   lp:~dannf/ubuntu/wily/irqbalance/lp1469214

Unfortunately, I'm still seeing irqbalance crash even with this backport:

[ 2461.635168] irqbalance[558]: unhandled input address range fault (11) at 0x20202020202034, esr 0x92000004
[ 2461.635175] pgd = ffffffcfab3f3000
[ 2461.675979] [20202020202034] *pgd=0000000000000000

[ 2461.733566] CPU: 4 PID: 558 Comm: irqbalance Not tainted 3.13.0-57-generic #95-Ubuntu
[ 2461.733570] task: ffffffcfa9cdcd00 ti: ffffffcfa9df8000 task.ti: ffffffcfa9df8000
[ 2461.733577] PC is at 0x40605c
[ 2461.733580] LR is at 0x4040e4
[ 2461.733582] pc : [<000000000040605c>] lr : [<00000000004040e4>] pstate: 80000000
[ 2461.733584] sp : 0000007fd95cf7a0
[ 2461.733585] x29: 0000007fd95cf7a0 x28: 000000000041a000
[ 2461.733588] x27: 000000000041a000 x26: 0000000000409510
[ 2461.733591] x25: 000000000041a000 x24: 0000000000405000
[ 2461.733593] x23: 000000000041acf8 x22: 000000000041a000
[ 2461.733596] x21: 0000000014ab0130 x20: 000000000041a000
[ 2461.733598] x19: 0000000014a9f0e0 x18: 0000000000000000
[ 2461.733601] x17: 0000007fa72118ec x16: 0000007fa75a72e0
[ 2461.733603] x15: 003bcfb11b54656b x14: 2030203020302030
[ 2461.733606] x13: 2030203020302030 x12: 2030203020302030
[ 2461.733608] x11: 2030203020302030 x10: 2030203020302030
[ 2461.733611] x9 : 2030203020302030 x8 : 0000000014a9bc80
[ 2461.733613] x7 : 0000000000000020 x6 : 0000000014a9bc90
[ 2461.733616] x5 : 0000000000000001 x4 : 0000007fa722a2a0
[ 2461.733618] x3 : 0000000014a9b880 x2 : 0000000000000001
[ 2461.733620] x1 : 4320202020202020 x0 : 000000003355000a