Microsoft company about the completion of testing of the WSL2 subsystem (Windows Subsystem for Linux), which ensures the launch of Linux executable files on Windows, and its readiness for official delivery as part of the Windows 10 2004 release.
WSL2 edition delivery of a full-fledged Linux kernel instead of an emulator that translates Linux system calls into Windows system calls on the fly. The Linux kernel in WSL2 will not be included in the Windows installation image, but will be loaded dynamically and kept up to date by Windows, similar to how graphics drivers are installed and updated. The standard Windows Update mechanism will be used to install and update the kernel.
Proposed for WSL2 is based on the Linux 4.19 kernel release, which runs in a Windows environment using a virtual machine already running in Azure. WSL2-specific patches applied in the kernel include optimizations to reduce kernel startup time, reduce memory consumption, return memory freed by Linux processes to Windows, and leave the minimum required set of drivers and subsystems in the kernel.
The WSL2 environment runs in a separate disk image (VHD) with an ext4 file system and a virtual network adapter. As in WSL1 userspace components separately and are based on assemblies of various distributions. For example, to install in WSL in the Microsoft Store catalog assembly , , ,
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Source: opennet.ru