你可以设置一些寄存器，并发出一个系统调用指令(或中断)，并由陷阱处理程序直接调用内核代码。

You set some registers and issue a system call instruction (or an interrupt) and have the kernel code called directly from the trap handler.

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动态应用迁移：这允许分区从一个系统转移到另一个系统，而不需要重新启动应用程序，也不会中断最终用户对系统的访问。

Live application mobility: this allows for partitions to be moved from one system to another without restarting applications or causing system disruption to end-users.

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由于它对系统中断点(一个全局变量)进行操作，所以它不能与其他分配程序或者mmap一起使用。

Since it operates on the system break (a global variable), it cannot coexist with any other allocator or with mmap.

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