我最近开始每隔几分钟在 /var/log/syslog 中收到以下消息。在 Google 中搜索“错过 PM 中断”，但没有找到有用的结果。
除了 sudo 比以前慢了一些之外，我的服务器目前似乎没有什么问题。我可以忽略这些消息吗？
Apr 25 07:45:12 whale kernel: [479065.384519] ------------[ cut here ]------------
Apr 25 07:45:12 whale kernel: [479065.384538] WARNING: at /build/buildd/linux-3.0.0/drivers/gpu/drm/i915/i915_irq.c:649 ironlake_irq_handler+0x971/0x980 [i915]()
Apr 25 07:45:12 whale kernel: [479065.384541] Hardware name: MS-7680
Apr 25 07:45:12 whale kernel: [479065.384543] Missed a PM interrupt
Apr 25 07:45:12 whale kernel: [479065.384545] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek i915 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm coretemp drm_kms_helper drm snd_timer snd soundcore usb_storage psmouse snd_page_alloc i2c_algo_bit serio_raw lp uas shpchp mei(C) video parport ahci libahci r8169
Apr 25 07:45:12 whale kernel: [479065.384573] Pid: 0, comm: swapper Tainted: G WC 3.0.0-17-generic-pae #30-Ubuntu
Apr 25 07:45:12 whale kernel: [479065.384576] Call Trace:
Apr 25 07:45:12 whale kernel: [479065.384585] [<c1050722>] warn_slowpath_common+0x72/0xa0
Apr 25 07:45:12 whale kernel: [479065.384596] [<f88e6be1>] ? ironlake_irq_handler+0x971/0x980 [i915]
Apr 25 07:45:12 whale kernel: [479065.384606] [<f88e6be1>] ? ironlake_irq_handler+0x971/0x980 [i915]
Apr 25 07:45:12 whale kernel: [479065.384611] [<c10507f3>] warn_slowpath_fmt+0x33/0x40
Apr 25 07:45:12 whale kernel: [479065.384621] [<f88e6be1>] ironlake_irq_handler+0x971/0x980 [i915]
Apr 25 07:45:12 whale kernel: [479065.384627] [<c10b42cb>] try_one_irq+0x7b/0xe0
Apr 25 07:45:12 whale kernel: [479065.384634] [<c154b9ce>] misrouted_irq+0x4d/0x75
Apr 25 07:45:12 whale kernel: [479065.384638] [<c10b45e2>] note_interrupt+0x82/0x150
Apr 25 07:45:12 whale kernel: [479065.384642] [<c10b2b4e>] handle_irq_event_percpu+0x9e/0x200
Apr 25 07:45:12 whale kernel: [479065.384647] [<c102df58>] ? default_spin_lock_flags+0x8/0x10
Apr 25 07:45:12 whale kernel: [479065.384652] [<c155dbad>] ? _raw_spin_lock_irqsave+0x2d/0x40
Apr 25 07:45:12 whale kernel: [479065.384657] [<c10b2ceb>] handle_irq_event+0x3b/0x60
Apr 25 07:45:12 whale kernel: [479065.384661] [<c10b4da0>] ? unmask_irq+0x30/0x30
Apr 25 07:45:12 whale kernel: [479065.384666] [<c10b4dee>] handle_fasteoi_irq+0x4e/0xc0
Apr 25 07:45:12 whale kernel: [479065.384668] <IRQ> [<c1565352>] ? do_IRQ+0x42/0xc0
Apr 25 07:45:12 whale kernel: [479065.384676] [<c15651b0>] ? common_interrupt+0x30/0x38
Apr 25 07:45:12 whale kernel: [479065.384682] [<c14500e0>] ? pci_mmcfg_write+0xe0/0x100
Apr 25 07:45:12 whale kernel: [479065.384687] [<c145b582>] ? kfree_skb+0x12/0x90
Apr 25 07:45:12 whale kernel: [479065.384691] [<c145ab07>] ? __skb_clone+0x27/0xd0
Apr 25 07:45:12 whale kernel: [479065.384697] [<c151d839>] ? packet_rcv_spkt+0x69/0x140
Apr 25 07:45:12 whale kernel: [479065.384702] [<c14672ae>] ? __netif_receive_skb+0x3de/0x4a0
Apr 25 07:45:12 whale kernel: [479065.384707] [<c1467d9f>] ? netif_receive_skb+0x6f/0x80
Apr 25 07:45:12 whale kernel: [479065.384711] [<c1467ec7>] ? napi_skb_finish+0x37/0x50
Apr 25 07:45:12 whale kernel: [479065.384715] [<c1468331>] ? napi_gro_receive+0xa1/0xb0
Apr 25 07:45:12 whale kernel: [479065.384721] [<f8432bec>] ? rtl8169_rx_interrupt.isra.67+0x9c/0x2b0 [r8169]
Apr 25 07:45:12 whale kernel: [479065.384728] [<f8433c80>] ? rtl8169_poll+0x30/0x80 [r8169]
Apr 25 07:45:12 whale kernel: [479065.384733] [<c14684fd>] ? net_rx_action+0x10d/0x220
Apr 25 07:45:12 whale kernel: [479065.384737] [<c116f7b0>] ? aio_queue_work+0x30/0x30
Apr 25 07:45:12 whale kernel: [479065.384742] [<c1057350>] ? local_bh_enable_ip+0x90/0x90
Apr 25 07:45:12 whale kernel: [479065.384746] [<c10573d1>] ? __do_softirq+0x81/0x1a0
Apr 25 07:45:12 whale kernel: [479065.384751] [<c1057350>] ? local_bh_enable_ip+0x90/0x90
Apr 25 07:45:12 whale kernel: [479065.384753] <IRQ> [<c1057716>] ? irq_exit+0x76/0xa0
Apr 25 07:45:12 whale kernel: [479065.384760] [<c156535b>] ? do_IRQ+0x4b/0xc0
Apr 25 07:45:12 whale kernel: [479065.384764] [<c1073a63>] ? __hrtimer_start_range_ns+0x163/0x400
Apr 25 07:45:12 whale kernel: [479065.384769] [<c15651b0>] ? common_interrupt+0x30/0x38
Apr 25 07:45:12 whale kernel: [479065.384774] [<c105007b>] ? unregister_exec_domain+0x4b/0x80
Apr 25 07:45:12 whale kernel: [479065.384779] [<c12e32f7>] ? intel_idle+0xb7/0x110
Apr 25 07:45:12 whale kernel: [479065.384784] [<c143fe0d>] ? cpuidle_idle_call+0x7d/0x240
Apr 25 07:45:12 whale kernel: [479065.384789] [<c1008c7a>] ? cpu_idle+0x8a/0xc0
Apr 25 07:45:12 whale kernel: [479065.384793] [<c152dd85>] ? rest_init+0x5d/0x68
Apr 25 07:45:12 whale kernel: [479065.384798] [<c1802774>] ? start_kernel+0x352/0x358
Apr 25 07:45:12 whale kernel: [479065.384801] [<c18023b3>] ? pass_bootoption.constprop.2+0xe2/0xe2
Apr 25 07:45:12 whale kernel: [479065.384805] [<c18020ba>] ? i386_start_kernel+0xa9/0xaf
Apr 25 07:45:12 whale kernel: [479065.384808] ---[ end trace 49847d47cca5a812 ]---
答案1
除非您的服务器不时丢失页面点击和网络连接，甚至丢失按键，否则丢失 PM 中断不会成为严重问题——几乎无法察觉。这似乎与您的视频驱动程序有关（日志的第二行），除非出现屏幕损坏，或者您正在使用 GPU 进行关键计算，否则您不必担心。