通过调用start_kernel，会调用一系列初始化函数来设置中断，执行进一步的内存配置，并加载初始ram磁盘。

With the call to start_kernel, a long list of initialization functions are called to set up interrupts, perform further memory configuration, and load the initial RAM disk.

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在内核引导过程中，初始ram磁盘(initrd)是由阶段2引导加载程序加载到内存中的，它会被复制到RAM中并挂载到系统上。

During the boot of the kernel, the initial-RAM disk (initrd) that was loaded into memory by the stage 2 boot loader is copied into RAM and mounted.

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