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CHW-1433: AFF-A800 disruption caused by watchdog nmi on CPU events

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Issue

AFF-A800 storage systems might experience an unresponsive CPU, followed by a watchdog non-maskable interrupt (NMI) system disruption.
The following is an example of the controller disruption message:

  • PANIC: watchdog nmi on cpu 12, hang cpu is 22 in process idle: cpu12 on release 9.11.1P11 (C) on Mon Oct 30 19:52:57 CDT 2023
    version: 9.11.1P11: Wed Aug 9 11:18:59 EDT 2023
    compile flags: x86_64.optimize
  • PANIC: nested machine check exception detected on CPU 26, no coredump will be generated.
  • Requesting SP to power cycle the filer to attempt to clear the Machine Check Event

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