1.libvirt
https://github.com/libvirt/libvirt.git
2.qemu
3.kvm
kvm/kvm.git - kernel-based virtual machine - kvm
4.linux
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
All major manufacturers conduct private iterative development and maintenance based on a stable version of the community. Each team in a major manufacturer will have a group of people dedicated to the community (highly active communities (openstack, K8s, docker, etc.), communities with forward-looking business value , the development of underlying core technology-based communities (virtualization, kernel, etc.), etc., and if possible, valuable private features will be pushed to the community to increase the company's influence in the community. ps: tencent's influence in the kvm community is domestically It is second to none; of course, we can also introduce community code into private projects. ps: When private project code encounters bugs, we can first go to Upstream project to find the answer. After all, Upstream project gathers the crystallization of outstanding masters from all over the world. Most of them Bugs can be perfectly fixed; if the Upstream project has no relevant bug fixes, congratulations, you may become the developer who planted trees.