我的系统崩溃了。如以下日志所示，systemd-udev.service 正在崩溃：
Apr 03 20:15:04 dut-3 charon-systemd[23290]: sending keep alive to 194.1.1.1[40055]
Apr 03 20:15:04 dut-3 charon-systemd[23290]: sending keep alive to 194.1.1.1[40055]
Apr 03 20:15:04 dut-3 charon-systemd[23290]: sending keep alive to 194.1.1.1[40055]
Apr 03 20:19:07 dut-3 systemd[1]: Created slice system-systemd\x2dcoredump.slice - Slice /system/systemd-coredump.
Apr 03 20:19:07 dut-3 systemd[1]: Started [email protected] - Process Core Dump (PID 276426/UID 0).
Apr 03 20:19:07 dut-3 systemd[1]: systemd-udevd.service: State 'stop-watchdog' timed out. Killing.
Apr 03 20:19:07 dut-3 systemd[1]: systemd-udevd.service: Killing process 1546 (systemd-udevd) with signal SIGKILL.
Apr 03 20:19:07 dut-3 systemd[1]: Started [email protected] - Process Core Dump (PID 276430/UID 0).
...
Apr 03 20:19:07 dut-3 systemd[1]: systemd-journald.service: Failed with result 'watchdog'.
...
Apr 03 20:17:00 dut-3 systemd[1]: systemd-udevd.service: Watchdog timeout (limit 3min)!
在尝试调试崩溃时，我想知道崩溃是由于看门狗超时还是由于崩溃而发生看门狗超时。具体来说，systemd-udevd.service 崩溃并且无法向看门狗发送消息。