什么是SysRq It is a 'magical' key combo you can hit which the kernel will respond to regardless of whatever else it is doing, unless it is completely locked up. 如何使能SysRq? 内核配置SysRq 若使用SysRq,需要在内核配置时设置Magic SysRq key(CONFIG_MAGIC_SYSRQ)为Y,内核配置信息如下: CONF