[1972386.718129] divide error: 0000 [#1] SMP 

[1972386.718145] last sysfs file: /sys/devices/xen/vbd-16756/block/sdx4/stat

[1972386.718150] CPU 0 

[1972386.718153] Modules linked in: raid0 ipt_REJECT ipt_LOG xt_limit xt_tcpudp ipt_addrtype xt_state ip6table_filter ip6_tables ipv6 nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack_ftp nf_conntrack iptable_filter ip_tables md_mod x_tables

[1972386.718180] Pid: 17338, comm: beam.smp Not tainted 2.6.32-305-ec2 #9-Ubuntu 

[1972386.718183] RIP: e030:[<ffffffff8102ceb4>]  [<ffffffff8102ceb4>] update_sd_lb_stats+0x3a4/0x4e0

[1972386.718195] RSP: e02b:ffff880443f2baa8  EFLAGS: 00010046

[1972386.718198] RAX: 0000000000000000 RBX: ffff880443f2bc94 RCX: 0000000000000001

[1972386.718202] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000

[1972386.718206] RBP: ffff880443f2bb88 R08: ffff88000184dbc8 R09: 0000000000000040

[1972386.718209] R10: 0000000000000109 R11: 0000000000000000 R12: 00000000ffffffff

[1972386.718213] R13: 000000000000a380 R14: ffffffffffffffff R15: 0000000000000000

[1972386.718222] FS:  00007fcffb30d710(0000) GS:ffff880001846000(0000) knlGS:0000000000000000

[1972386.718226] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033

[1972386.718229] CR2: 00007fcff3697000 CR3: 0000000443ca0000 CR4: 0000000000002620

[1972386.718233] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[1972386.718237] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000000

[1972386.718241] Process beam.smp (pid: 17338, threadinfo ffff880443f2a000, task ffff880443daa800)

[1972386.718245] Stack:

[1972386.718247]  ffff880443f2bac8 ffff880443f2bb28 00000000000005a8 0000000000000000

[1972386.718252] <0> ffff88000184daa0 0000000000000000 0000000000000000 0000000000000008

[1972386.718258] <0> 000000000000a380 000000000000a380 ffff88000184dbb0 000000000000a380

[1972386.718265] Call Trace:

[1972386.718271]  [<ffffffff8103877d>] find_busiest_group+0x4d/0x460

[1972386.718276]  [<ffffffff81039294>] load_balance_newidle+0xa4/0x320

[1972386.718282]  [<ffffffff814a1623>] thread_return+0x3cc/0x429

[1972386.718286]  [<ffffffff814a1941>] schedule_timeout+0x181/0x2c0

[1972386.718291]  [<ffffffff8104bbd0>] ? process_timeout+0x0/0x10

[1972386.718297]  [<ffffffff811270c1>] ep_poll+0x151/0x240

[1972386.718301]  [<ffffffff81030260>] ? default_wake_function+0x0/0x10

[1972386.718308]  [<ffffffff810638d9>] ? ktime_get_ts+0xa9/0xe0

[1972386.718311]  [<ffffffff81127275>] sys_epoll_wait+0xc5/0xe0

[1972386.718317]  [<ffffffff81009ba8>] system_call_fastpath+0x16/0x1b

[1972386.718321]  [<ffffffff81009b40>] ? system_call+0x0/0x52

[1972386.718325] Code: 06 89 85 50 ff ff ff c7 85 54 ff ff ff 01 00 00 00 e9 cf fd ff ff 90 48 8b 95 70 ff ff ff 48 8b 45 a8 8b 72 08 48 c1 e0 0a 31 d2 <48> f7 f6 48 8b 75 b0 48 89 45 a0 31 c0 48 85 f6 74 0c 48 8b 45 

[1972386.718359] RIP  [<ffffffff8102ceb4>] update_sd_lb_stats+0x3a4/0x4e0

[1972386.718364]  RSP <ffff880443f2baa8>

[1972386.718369] ---[ end trace 59a4432034881dbd ]---

[1974112.174219] divide error: 0000 [#2] SMP 

[1974112.174228] last sysfs file: /sys/devices/xen/vbd-16756/block/sdx4/stat

[1974112.174232] CPU 1 

[1974112.174234] Modules linked in: raid0 ipt_REJECT ipt_LOG xt_limit xt_tcpudp ipt_addrtype xt_state ip6table_filter ip6_tables ipv6 nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack_ftp nf_conntrack iptable_filter ip_tables md_mod x_tables

[1974112.174259] Pid: 0, comm: swapper Tainted: G      D    2.6.32-305-ec2 #9-Ubuntu 

[1974112.174263] RIP: e030:[<ffffffff8102ceb4>]  [<ffffffff8102ceb4>] update_sd_lb_stats+0x3a4/0x4e0

[1974112.174271] RSP: e02b:ffff88000185bbd0  EFLAGS: 00010246

[1974112.174274] RAX: 0000000000000000 RBX: ffff88000185bdd8 RCX: 0000000000000000

[1974112.174278] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000

[1974112.174282] RBP: ffff88000185bcb0 R08: ffff88000184dbc8 R09: 0000000000000040

[1974112.174286] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000

[1974112.174290] R13: 000000000000a380 R14: 0000000000000000 R15: 0000000000000000

[1974112.174297] FS:  00007fcffa90c710(0000) GS:ffff880001858000(0000) knlGS:0000000000000000

[1974112.174302] CS:  e033 DS: 002b ES: 002b CR0: 000000008005003b

[1974112.174305] CR2: 00007fcff3696008 CR3: 0000000443ca0000 CR4: 0000000000002620

[1974112.174309] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[1974112.174313] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000000

[1974112.174318] Process swapper (pid: 0, threadinfo ffff88044546c000, task ffff88044546a0c0)

[1974112.174322] Stack:

[1974112.174324]  ffff88000185bc00 ffff88000185bc50 010100000000a380 ffff88000185be4c

[1974112.174329] <0> ffff88000185faa0 0000000100000000 00000000ffffffff 0000000000000010

[1974112.174336] <0> 000000000000a380 000000000000a380 ffff88000184dbb0 000000000000a380

[1974112.174343] Call Trace:

[1974112.174345]  <IRQ> 

[1974112.174350]  [<ffffffff8103877d>] find_busiest_group+0x4d/0x460

[1974112.174355]  [<ffffffff8103026d>] ? default_wake_function+0xd/0x10

[1974112.174359]  [<ffffffff81038c3b>] load_balance+0xab/0x470

[1974112.174364]  [<ffffffff8105f56d>] ? sched_clock_cpu+0xdd/0x120

[1974112.174368]  [<ffffffff81039095>] rebalance_domains+0x95/0x1b0

[1974112.174372]  [<ffffffff810391e1>] run_rebalance_domains+0x31/0x40

[1974112.174377]  [<ffffffff81043d75>] __do_softirq+0xd5/0x220

[1974112.174382]  [<ffffffff8100a80c>] call_softirq+0x1c/0x30

[1974112.174386]  [<ffffffff8100ba85>] do_softirq+0xb5/0xf0

[1974112.174390]  [<ffffffff810437bd>] irq_exit+0x3d/0x50

[1974112.174396]  [<ffffffff8139ef54>] evtchn_do_upcall+0x214/0x240

[1974112.174401]  [<ffffffff8100a27e>] do_hypervisor_callback+0x1e/0x30

[1974112.174405]  <EOI> 

[1974112.174409]  [<ffffffff8100c5d5>] ? xen_safe_halt+0x15/0x40

[1974112.174414]  [<ffffffff8100fdd6>] ? xen_idle+0x36/0xa0

[1974112.174418]  [<ffffffff81007e65>] ? cpu_idle+0xb5/0x100

[1974112.174423]  [<ffffffff814a01bc>] ? cpu_bringup_and_idle+0xe/0x10

[1974112.174427] Code: 06 89 85 50 ff ff ff c7 85 54 ff ff ff 01 00 00 00 e9 cf fd ff ff 90 48 8b 95 70 ff ff ff 48 8b 45 a8 8b 72 08 48 c1 e0 0a 31 d2 <48> f7 f6 48 8b 75 b0 48 89 45 a0 31 c0 48 85 f6 74 0c 48 8b 45 

[1974112.174472] RIP  [<ffffffff8102ceb4>] update_sd_lb_stats+0x3a4/0x4e0

[1974112.174477]  RSP <ffff88000185bbd0>

[1974112.174480] ---[ end trace 59a4432034881dbe ]---

[1974112.174483] Kernel panic - not syncing: Fatal exception in interrupt

[1974112.174487] Pid: 0, comm: swapper Tainted: G      D    2.6.32-305-ec2 #9-Ubuntu

[1974112.174491] Call Trace:

[1974112.174493]  <IRQ>  [<ffffffff814a074c>] panic+0x73/0x148

[1974112.174500]  [<ffffffff814a492e>] oops_end+0xee/0xf0

[1974112.174503]  [<ffffffff8100dbd6>] die+0x56/0x90

[1974112.174507]  [<ffffffff814a4014>] do_trap+0xc4/0x170

[1974112.174511]  [<ffffffff8100b06a>] do_divide_error+0xaa/0xc0

[1974112.174515]  [<ffffffff8102ceb4>] ? update_sd_lb_stats+0x3a4/0x4e0

[1974112.174520]  [<ffffffff813b2921>] ? network_start_xmit+0x301/0x490

[1974112.174524]  [<ffffffff8100a405>] divide_error+0x25/0x30

[1974112.174528]  [<ffffffff8102ceb4>] ? update_sd_lb_stats+0x3a4/0x4e0

[1974112.174533]  [<ffffffff8103877d>] find_busiest_group+0x4d/0x460

[1974112.174537]  [<ffffffff8103026d>] ? default_wake_function+0xd/0x10

[1974112.174541]  [<ffffffff81038c3b>] load_balance+0xab/0x470

[1974112.174545]  [<ffffffff8105f56d>] ? sched_clock_cpu+0xdd/0x120

[1974112.174549]  [<ffffffff81039095>] rebalance_domains+0x95/0x1b0

[1974112.174553]  [<ffffffff810391e1>] run_rebalance_domains+0x31/0x40

[1974112.174556]  [<ffffffff81043d75>] __do_softirq+0xd5/0x220

[1974112.174561]  [<ffffffff8100a80c>] call_softirq+0x1c/0x30

[1974112.174565]  [<ffffffff8100ba85>] do_softirq+0xb5/0xf0

[1974112.174568]  [<ffffffff810437bd>] irq_exit+0x3d/0x50

[1974112.174572]  [<ffffffff8139ef54>] evtchn_do_upcall+0x214/0x240

[1974112.174576]  [<ffffffff8100a27e>] do_hypervisor_callback+0x1e/0x30

[1974112.174579]  <EOI>  [<ffffffff8100c5d5>] ? xen_safe_halt+0x15/0x40

[1974112.174585]  [<ffffffff8100fdd6>] ? xen_idle+0x36/0xa0

[1974112.174588]  [<ffffffff81007e65>] ? cpu_idle+0xb5/0x100

[1974112.174593]  [<ffffffff814a01bc>] ? cpu_bringup_and_idle+0xe/0x10