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多个板子出现rcu异常，最严重导致板子卡死，串口和网卡均无法进入系统，相关日志如下，各位大神，指导下：
其中dmesg报错中提到两个进程 P12134 P11965，wwan0是4G模块接口名；另外ifconfig wwan0进程变成D，这个会是导致modprobe RCU告警的吗？
