NMI Watchdog 在 CPU XX 中检测到硬锁定，位于 _spin_lock_irqsave。

Issue

• 内核 panic，带有以下调用追踪信息。

Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 14
Pid: 35242, comm: oracle Tainted: P           ---------------    2.6.32-431.5.1.el6.x86_64 #1
Call Trace:
 <NMI>  [<ffffffff81527513>] ? panic+0xa7/0x16f
 [<ffffffff810153a3>] ? native_sched_clock+0x13/0x80
 [<ffffffff810e696d>] ? watchdog_overflow_callback+0xcd/0xd0
 [<ffffffff8111c847>] ? __perf_event_overflow+0xa7/0x240
 [<ffffffff8101d93d>] ? x86_perf_event_set_period+0xdd/0x170
 [<ffffffff8111ce14>] ? perf_event_overflow+0x14/0x20
 [<ffffffff81022d87>] ? intel_pmu_handle_irq+0x187/0x2f0
 [<ffffffff8152d1f6>] ? kprobe_exceptions_notify+0x16/0x430
 [<ffffffff8152bd69>] ? perf_event_nmi_handler+0x39/0xb0
 [<ffffffff8152d825>] ? notifier_call_chain+0x55/0x80
 [<ffffffff8152d88a>] ? atomic_notifier_call_chain+0x1a/0x20
 [<ffffffff810a153e>] ? notify_die+0x2e/0x30
 [<ffffffff8152b4eb>] ? do_nmi+0x1bb/0x340
 [<ffffffff8152adb0>] ? nmi+0x20/0x30
 [<ffffffff8152a50d>] ? _spin_lock_irqsave+0x2d/0x40
 <<EOE>>  <IRQ>  [<ffffffffa02e66df>] ? PowerPlatformTopIodone+0x17f/0x220 [emcp]
 [<ffffffffa02ee199>] ? PowerTopIodone+0x29/0x170 [emcp]
 [<ffffffffa02ee337>] ? PowerProcessTopIodonePirps+0x57/0xd0 [emcp]
 [<ffffffffa02ee6f0>] ? PowerBottomIodoneNew+0x230/0x550 [emcp]
 [<ffffffffa02eebe7>] ? PowerPlatformBottomIodone+0xd7/0x140 [emcp]
 [<ffffffff812658d7>] ? __blk_run_queue+0x27/0x40
 [<ffffffff811c22bd>] ? bio_endio+0x1d/0x40
 [<ffffffff81264ebb>] ? req_bio_endio+0x9b/0xe0
 [<ffffffff81266437>] ? blk_update_request+0x117/0x490
 [<ffffffff812667d7>] ? blk_update_bidi_request+0x27/0xa0
 [<ffffffff8127d5c5>] ? __cfq_slice_expired+0x1e5/0x530
 [<ffffffff812688cf>] ? blk_end_bidi_request+0x2f/0x80
 [<ffffffff81268970>] ? blk_end_request+0x10/0x20
 [<ffffffff81389acf>] ? scsi_io_completion+0xaf/0x6c0
 [<ffffffff8137ff52>] ? scsi_finish_command+0xc2/0x130
 [<ffffffff8138a245>] ? scsi_softirq_done+0x145/0x170
 [<ffffffff8126e855>] ? blk_done_softirq+0x85/0xa0
 [<ffffffff8127bce0>] ? cfq_kick_queue+0x0/0x60
 [<ffffffff8107a8e1>] ? __do_softirq+0xc1/0x1e0
 [<ffffffff8100c30c>] ? call_softirq+0x1c/0x30
 <EOI>  [<ffffffff8100fa75>] ? do_softirq+0x65/0xa0
 [<ffffffff8107b5da>] ? local_bh_enable+0x9a/0xb0
 [<ffffffff8149123d>] ? __ip_route_output_key+0x17d/0x1b0
 [<ffffffff814912a6>] ? ip_route_output_flow+0x36/0x2c0
 [<ffffffff81498a00>] ? ip_generic_getfrag+0x0/0xb0
 [<ffffffff814bd80a>] ? udp_sendmsg+0x78a/0x930
 [<ffffffff814c5eba>] ? inet_sendmsg+0x4a/0xb0
 [<ffffffff8122ed0f>] ? selinux_socket_sendmsg+0x1f/0x30
 [<ffffffff81448003>] ? sock_sendmsg+0x123/0x150
 [<ffffffff81449cb3>] ? sock_recvmsg+0x133/0x160
 [<ffffffff8109b290>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff8119fec0>] ? pollwake+0x0/0x60
 [<ffffffff8119fec0>] ? pollwake+0x0/0x60
 [<ffffffff81447e54>] ? move_addr_to_kernel+0x64/0x70
 [<ffffffff814497f6>] ? __sys_sendmsg+0x406/0x420
 [<ffffffff810129de>] ? copy_user_generic+0xe/0x20
 [<ffffffff810179ab>] ? check_for_xstate+0x3b/0x90
 [<ffffffff8100b9ce>] ? common_interrupt+0xe/0x13
 [<ffffffff810149b9>] ? read_tsc+0x9/0x20
 [<ffffffff810a7091>] ? ktime_get_ts+0xb1/0xf0
 [<ffffffff81449a19>] ? sys_sendmsg+0x49/0x90
 [<ffffffff8100b072>] ? system_call_fastpath+0x16/0x1b