如何跟踪打开 /dev/watchdog 并错误关闭，导致出现 "watchdog did not stop!" 消息，然后系统崩溃的进程？

Issue

• 如何跟踪打开 /dev/watchdog 并错误关闭，导致出现 "watchdog did not stop!" 消息，然后系统崩溃的进程？

kernel: watchdog: watchdog0: watchdog did not stop!
kernel: watchdog: watchdog0: watchdog did not stop!

• 为什么执行 grep -R "No valid host was found" / 会导致系统重置并显示以下消息

"The watchdog timer reset the system" (iDRAC) 

UEFI0082: The system was reset due to a timeout from the watchdog timer. 
Check the System Event Log (SEL) or crash dumps from Operating Sysstem to 
identify the source that triggered the watchdog timer reset. Update the
firmware or driver for the identified device.