根据设备驱动程序的不同，如果设备具有缓冲区，可能需要使用一个缓冲区的拷贝。

Depending on your device driver, you may need to have a copy of the buffers, if the device has any.

youdao

例如，对底层设备驱动程序的读写请求会通过缓冲区缓存来传递。

For example, read and write requests to the underlying device drivers migrate through the buffer cache.

youdao

否则，数据会通过驱动器缓冲被分段。

Otherwise, data is staged through a driver buffer.

youdao