clean 列表表示设备中的块全部为有效节点。

The clean list represents blocks on the device that are full of valid nodes.

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设备会用两种状态来表示，即可用或已定义，用这两种状态表示设备是否可以使用。

Devices can be presented in one of two states-available or defined-denoting whether the device can be used.

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这个虚拟接口包含预期的接口，包括表示设备(如shadow PCI)的虚拟地址空间和虚拟中断。

This virtual interface would consist of the expected interface, including a virtual address space representing the device (such as shadow PCI) and virtual interrupt.

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