khadas@Khadas:~$ systemctl status watchdog.service ● watchdog.service - watchdog daemon Loaded: loaded (/lib/systemd/system/watchdog.service; enabled; vendor pres> Active: active (running) since Fri 2021-03-26 10:00:38 UTC; 15min ago Process: 3381 ExecStartPre=/bin/sh -c [ -z "${watchdog_module}" ] || [ "${w> Process: 3382 ExecStart=/bin/sh -c [ $run_watchdog != 1 ] || exec /usr/sbin> Main PID: 3385 (watchdog) Tasks: 1 (limit: 2932) Memory: 864.0K CGroup: /system.slice/watchdog.service └─3385 /usr/sbin/watchdog -s -v -c /etc/watchdog.conf Mar 26 10:15:38 Khadas watchdog[3385]: still alive after 120 interval(s) Mar 26 10:15:39 Khadas watchdog[3385]: still alive after 121 interval(s) Mar 26 10:15:40 Khadas watchdog[3385]: still alive after 122 interval(s) Mar 26 10:15:41 Khadas watchdog[3385]: still alive after 123 interval(s) Mar 26 10:15:42 Khadas watchdog[3385]: still alive after 124 interval(s) Mar 26 10:15:43 Khadas watchdog[3385]: still alive after 125 interval(s) Mar 26 10:15:44 Khadas watchdog[3385]: still alive after 126 interval(s) Mar 26 10:15:45 Khadas watchdog[3385]: still alive after 127 interval(s) Mar 26 10:15:46 Khadas watchdog[3385]: still alive after 128 interval(s) Mar 26 10:15:47 Khadas watchdog[3385]: still alive after 129 interval(s) lines 1-21/21 (END)
测试看门狗
手动触发内核奔溃。
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khadas@Khadas:~$ sudo -i root@Khadas:~# echo c > /proc/sysrq-trigger