它把主机的请求转给硬件设备模块(HDM)进行处理。
It forwards host requests to Hardware Device Module (HDM) for processing.
有趣的是，对于lkm来说，我们不会注意到有什么性能方面的差异，因此这对于创建一个适应于自己环境的内核来说是一种功能强大的手段，这样可以根据可用硬件和连接的设备来加载对应的模块。
Interestingly, you won't notice a performance hit for LKMs, so they're a powerful means of creating a lean kernel that ADAPTS to its environment based upon the available hardware and attached devices.
在这个阶段中，第二阶段的引导加载程序会检测系统硬件、枚举系统链接的硬件设备、挂载根设备，然后加载必要的内核模块。
At this stage, the second-stage boot loader checks the system hardware, enumerates the attached hardware devices, mounts the root device, and then loads the necessary kernel modules.
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