Issue

• Kernel panic with following call traces.

  Kernel panic - not syncing: Hard LOCKUP
  Pid: 2981, comm: flush-253:9 Not tainted 2.6.32-696.20.1.el6.x86_64 #1
  Call Trace:
  <NMI>  [<ffffffff8154b121>] ? panic+0xa7/0x179
  [<ffffffff810f35c0>] ? watchdog_timer_fn+0x0/0x230
  [<ffffffff8112c387>] ? __perf_event_overflow+0xa7/0x240
  [<ffffffff8101cbe6>] ? x86_perf_event_set_period+0xf6/0x180
  [<ffffffff8112c9e4>] ? perf_event_overflow+0x14/0x20
  [<ffffffff8102408c>] ? intel_pmu_handle_irq+0x21c/0x480
  [<ffffffff81551ab9>] ? perf_event_nmi_handler+0x39/0xb0
  [<ffffffff815535b5>] ? notifier_call_chain+0x55/0x80
  [<ffffffff8108fa40>] ? process_timeout+0x0/0x10
  [<ffffffff8155361a>] ? atomic_notifier_call_chain+0x1a/0x20
  [<ffffffff810ad65e>] ? notify_die+0x2e/0x30
  [<ffffffff81551139>] ? do_nmi+0xd9/0x360
  [<ffffffff81550a39>] ? nmi+0x1f9/0x258
  [<ffffffff8108fa40>] ? process_timeout+0x0/0x10
  [<ffffffff81090214>] ? run_timer_softirq+0xa4/0x340
  <<EOE>>  <IRQ>  [<ffffffff8108fb66>] ? update_process_times+0x76/0x90
  [<ffffffff8103cd42>] ? native_apic_msr_write+0x32/0x40
  [<ffffffff81085a85>] ? __do_softirq+0xe5/0x230
  [<ffffffff81558bfc>] ? call_softirq+0x1c/0x30
  [<ffffffff8100e545>] ? do_softirq+0x65/0xa0
  [<ffffffff81085915>] ? irq_exit+0x85/0x90
  [<ffffffff81559c1a>] ? smp_apic_timer_interrupt+0x4a/0x60
  [<ffffffff81558483>] ? apic_timer_interrupt+0x13/0x20
  <EOI>  [<ffffffff8154ee37>] ? _spin_unlock_irqrestore+0x17/0x20
  [<ffffffff8109052b>] ? try_to_del_timer_sync+0x7b/0xe0
  [<ffffffff810905b2>] ? del_timer_sync+0x22/0x30
  [<ffffffff8154c7ca>] ? schedule_timeout+0x19a/0x2e0
  [<ffffffff8108fa40>] ? process_timeout+0x0/0x10
  [<ffffffff811c89ba>] ? bdi_writeback_thread+0x17a/0x220
  [<ffffffff811c8840>] ? bdi_writeback_thread+0x0/0x220
  [<ffffffff810a6dee>] ? kthread+0x9e/0xc0
  [<ffffffff81558afa>] ? child_rip+0xa/0x20
  [<ffffffff810a6d50>] ? kthread+0x0/0xc0
  [<ffffffff81558af0>] ? child_rip+0x0/0x20