内核 Panic, getnstimeofday64 中有硬锁定或软锁定

Issue

• 当 CPU 处于 __getnstimeofday64+0x90时，系统 panic,且有硬锁定

• 遇到了一个硬锁定，其中有问题的 CPU 可能处于中断中的 getnstimeofday64+0xe 中。

  [1459541.125835] Kernel panic - not syncing: Hard LOCKUP
  [1459541.126109] CPU: 11 PID: 2632 Comm: X Tainted: P           OEL ------------   3.10.0-693.11.6.el7.x86_64 #1
  [1459541.126606] Hardware name: Cisco Systems Inc UCSC-C220-M4S/UCSC-C220-M4S, BIOS C220M4.3.0.4a.0.0226182253 02/26/2018
  [1459541.127136] Call Trace:
  [1459541.127272]  <NMI>  [<ffffffff816a5ea1>] dump_stack+0x19/0x1b
  [1459541.127609]  [<ffffffff8169fd64>] panic+0xe8/0x20d
  [1459541.127874]  [<ffffffff8108919f>] nmi_panic+0x3f/0x40
  [1459541.128146]  [<ffffffff81131775>] watchdog_overflow_callback+0xf5/0x100
  [1459541.128495]  [<ffffffff81170261>] __perf_event_overflow+0x51/0xf0
  [1459541.128820]  [<ffffffff81178db4>] perf_event_overflow+0x14/0x20
  [1459541.129136]  [<ffffffff81009f88>] intel_pmu_handle_irq+0x218/0x4f0
  [1459541.129467]  [<ffffffff8132e4c2>] ? put_dec+0x72/0x90
  [1459541.129739]  [<ffffffff8132f4b3>] ? number.isra.2+0x323/0x360
  [1459541.130046]  [<ffffffff81326c6c>] ? ioremap_page_range+0x26c/0x3d0
  [1459541.130372]  [<ffffffff811c28c4>] ? vunmap_page_range+0x1b4/0x300
  [1459541.130700]  [<ffffffff813dc306>] ? ghes_copy_tofrom_phys+0x116/0x210
  [1459541.131041]  [<ffffffff813dc4a0>] ? ghes_read_estatus+0xa0/0x190
  [1459541.131363]  [<ffffffff816af02b>] perf_event_nmi_handler+0x2b/0x50
  [1459541.131692]  [<ffffffff816b0c57>] nmi_handle.isra.0+0x87/0x160
  [1459541.132004]  [<ffffffff816b0f40>] do_nmi+0x210/0x450
  [1459541.132273]  [<ffffffff816b00b9>] end_repeat_nmi+0x1e/0x7e
  [1459541.132570]  [<ffffffff810ec630>] ? __getnstimeofday64+0x90/0xd0
  [1459541.132888]  [<ffffffff810ec630>] ? __getnstimeofday64+0x90/0xd0
  [1459541.133207]  [<ffffffff810ec630>] ? __getnstimeofday64+0x90/0xd0
  [1459541.133518]  <<EOE>>  <IRQ>  [<ffffffff810ec67e>] getnstimeofday64+0xe/0x30    <---
  [1459541.133921]  [<ffffffff810ec735>] ktime_get_real+0x25/0x70
  [1459541.134214]  [<ffffffff81589246>] netif_receive_skb_internal+0x76/0xc0
  [1459541.134557]  [<ffffffff8158a318>] napi_gro_receive+0xd8/0x130
  [1459541.134912]  [<ffffffffc019c2c7>] igb_clean_rx_irq+0x387/0x6f0 [igb]
  [1459541.146843]  [<ffffffff8109d80a>] ? signal_wake_up_state+0x2a/0x30
  [1459541.158691]  [<ffffffffc019c9ab>] igb_poll+0x37b/0x760 [igb]
  [1459541.170351]  [<ffffffff810b5021>] ? run_posix_cpu_timers+0x51/0x830
  [1459541.182038]  [<ffffffff8158999d>] net_rx_action+0x16d/0x380
  [1459541.193630]  [<ffffffff810925bf>] __do_softirq+0xef/0x280
  [1459541.204942]  [<ffffffff816bd3ac>] call_softirq+0x1c/0x30
  [1459541.216073]  [<ffffffff8102d405>] do_softirq+0x65/0xa0
  [1459541.227106]  [<ffffffff81092945>] irq_exit+0x105/0x110
  [1459541.237865]  [<ffffffff816be986>] do_IRQ+0x56/0xe0
  [1459541.248444]  [<ffffffff816af4f2>] common_interrupt+0x232/0x232