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What does the log message "CPU 0: Kernel thread" represent?

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TitleWhat does the log message "CPU 0: Kernel thread" represent?
Question
  • Switch generated following log message:

MSM-A: CPU 0: Kernel thread was stuck for 2.25 seconds, jiffies: 3538282955

Environment
  • EXOS all
  • Summit all
Answer
  • This message appears when kernel is used by some process for a long time. Since Kernel sync the hal and the CPU, if the process used by Kernel gets stuck, it leads to switch reboot to release it. These are health-check-packets.
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