但是，大多数超级用户级命令是新的，它们同时执行许多不同的操作。

But, most of the superuser level commands are new and perform many different operations at once.

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load 工具实现这一点的方法是，请求目标表上的一个超级排他（Z）锁，并在加载操作期间一直持有这个锁（参阅清单 4）。

The load utility accomplishes this by requesting a super exclusive (Z) lock on the table and retaining this lock for the duration of the load operation (see Listing 4).

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经修改的操作系统通过泛虚拟的hypervisor所支持的“超级调用（hypercalls）”直接与硬件打交道。

Modified operating systems use the "hypercalls" supported by the paravirtualized hypervisor to interface directly with the hardware.

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