类型1 hypervisor的一个例子是基于内核的虚拟机(KVM——它本身是一个基于操作系统的hypervisor)。
Examples of type 1 hypervisors include Kernel-based Virtual Machine (kvm-itself an operating system-based hypervisor).
理由是：对基于容器的文件系统的访问要经过操作系统内核，而操作系统带有一个文件系统缓存，可以加快对文件的重复访问。
The rationale is this: access to a file system based container goes through the operating system kernel, and the operating system comes with a file system cache to speed up repetitive access to files.
未来的基于功能性的微型内核的操作系统可能会自动收缩和增长，以适应无处不在的计算的不断变化的需求。
Future operating systems based around tiny kernels of functionality may automatically shrink and grow to fit the dynamically changing needs of ubiquitous computing.
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