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Thursday, October 29 • 06:30 - 07:00
Evaluate Implementation Options of KVM-based Type1 (or 1.5) Hypervisor - Jun Nakajima, Intel

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We share our evaluation of KVM-based Type1 (or 1.5) hypervisor (KVM++) to discuss which option is the best for the community, showing the pros and cons of the implementation options. At the last KVM Forum, we showed a high-level architecture of KVM++, where we can isolate guest memory from the host except the areas for I/O buffers, in order to better protect and isolate guests. In terms of the implementation, one extreme is to run it as a KVM guest on top of a hypervisor that consists of KVM/mini-Linux. At the other end, we deprivilege it with almost everything passthrough except memory access. The former requires nested virtualization if KVM is used on the host Linux. The latter doesn’t. Those implementations can affect overhead and latency of the systems as well, and the implication and impacts can depend on the platform (i.e. client vs. server).

avatar for Jun Nakajima

Jun Nakajima

Software Engineer (Sr. PE), Intel
Jun Nakajima is a Senior Principal Engineer at the Intel Open Source Technology Center, leading open source virtualization, such as KVM and Xen. Jun presented a number of times at technical conferences, including LSS, KVM Forum, Xen Summit, LinuxCon, OpenStack Summit, and USENIX... Read More →

Thursday October 29, 2020 06:30 - 07:00 GMT
KVM Theater
  KVM Forum, KVM