Microsoft sends Linux kernel patches to make it possible for complete Hyper-V on Linux

Microsoft has in fact sent a series of patches to the Linux kernel with its goal being “to produce a complete virtualization stack with Linux and Microsoft Hypervisor.”

The patches are designated “RFC” (Demand for remarks) and are a very little execution provided for discussion.

The key modification is that with the covered kernel, Linux will run as the Hyper-V root partition. In the Hyper-V architecture, the root partition has direct access to hardware and establishes kid partitions for the VMs it hosts. “Simply think of it like Xen’s Dom0,” stated Microsoft principal software engineer Wei Liu.

Hyper-V’s architecture is more equivalent to Xen than it is to KVM or to VMware’s ESXi, and Liu acknowledged that “we drew motivation from the Xen code in Linux,” particularly for code handing disrupts. Formerly, the Hyper-V root partition required to run Windows.

In the Hyper-V architecture, the root partition has direct access to the hardware and creates child partitions for the VMs. It runs on top of the privileged ring -1 Microsoft Hypervisor.

In the Hyper-V architecture, the root partition has direct access to the hardware and produces kid partitions for the VMs. It runs on leading of the lucky ring -1 Microsoft Hypervisor

Microsoft has actually also ported Intel’s open-source Cloud Hypervisor, a Virtual Machine Screen (VMM) composed in Rust that generally runs on KVM, the hypervisor that is developed into theLinux kernel Cloud Hypervisor itself is currently in “extremely early pre-alpha phase”.

Even when Linux is the root partition, it will still work on leading of Microsoft’s hypervisor, a thin layer running with ring -1 opportunities. It will no longer be required to run Windows on that hypervisor, nevertheless, allowing Microsoft to call the new plan “a total virtualization stack with Linux”.


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With these changes, Microsoft most likely has its Azure cloud facilities in mind. Azure runs more Linux than Windows, as recognized back in July 2019 by Microsoft engineer Sasha Levin who specified: “The Linux use on our cloud has actually exceeded Windows.” The percentage of Linux work looks set to boost with the pattern towards Kubernetes, which is primarily aLinux technology Linux currently runs well on Hyper-V with a Windows root partition, however making this a total Linux stack might enhance performance.

Microsoft is also busy enhancing Linux help in Windows 10, thanks to the Windows Subsystem for Linux (WSL 2), and now ships a Linux kernel with Windows.

Microsoft’s Ignite virtual affair is next week and we can expect the business to state more about its Linux plans then. ®& reg;

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