[hpvsa] モジュールの OS_int_global_disable() から呼び出された _spin_lock_irqsave+0x2f でシステムがハードロックアップに至る

crash> log
<0>Kernel panic - not syncing:Watchdog detected hard LOCKUP on cpu 0
<4>Pid:0, comm: swapper Tainted:P 2.6.32-504.el6.x86_64 #1
<4>Call Trace:
<4> <NMI>  [<ffffffff815292bc>] ? panic+0xa7/0x16f
<4> [<ffffffff81014a29>] ? sched_clock+0x9/0x10
<4> [<ffffffff810ea5dd>] ? watchdog_overflow_callback+0xcd/0xd0
<4> [<ffffffff81120d87>] ?__perf_event_overflow+0xa7/0x240
<4> [<ffffffff8101db9d>] ? x86_perf_event_set_period+0xdd/0x170
<4> [<ffffffff811213d4>] ? perf_event_overflow+0x14/0x20
<4> [<ffffffff81024962>] ? intel_pmu_handle_irq+0x202/0x410
<4> [<ffffffff8152e5b9>] ? perf_event_nmi_handler+0x39/0xb0
<4> [<ffffffff81530075>] ? notifier_call_chain+0x55/0x80
<4> [<ffffffffa00df3e0>] ?OS_Timer_Tick+0x0/0xd0 [hpvsa]
<4> [<ffffffff815300da>] ? atomic_notifier_call_chain+0x1a/0x20
<4> [<ffffffff810a4eae>] ? notify_die+0x2e/0x30
<4> [<ffffffff8152dd3b>] ? do_nmi+0x1bb/0x340
<4> [<ffffffff8152d600>] ? nmi+0x20/0x30
<4> [<ffffffffa00df3e0>] ?OS_Timer_Tick+0x0/0xd0 [hpvsa]
<4> [<ffffffff8152cd5f>] ?_spin_lock_irqsave+0x2f/0x40
<4> <<EOE>>  <IRQ>  [<ffffffffa00e04fc>] ?OS_int_global_disable+0x3c/0x50 [hpvsa]
<4> [<ffffffffa00e6b86>] ? heartbeat_task+0x26/0x890 [hpvsa]
<4> [<ffffffff81060dce>] ? scheduler_tick+0x11e/0x260
<4> [<ffffffffa00df44d>] ?OS_Timer_Tick+0x6d/0xd0 [hpvsa]
<4> [<ffffffff81087db7>] ? run_timer_softirq+0x197/0x340