Linux Kernel Run Directly in a Browser for the First Time — Without Installation or Virtual Machines
The project demonstrated the significant potential of WebAssembly for running complex system components.
The project demonstrated the significant potential of WebAssembly for running complex system components.
Developer Joel Savolainen presented an experimental build of the Linux kernel, ported to the WebAssembly format, allowing it to run directly in a browser. The demo version operates in a shell environment and supports basic commands, but its stability leaves much to be desired—using it in Google Chrome quickly leads to crashes.
According to the author, this project does not aim for practical application and is rather considered a technical experiment. He emphasizes that current limitations of both platforms—both Linux and WebAssembly—hinder the implementation of full support, but they are not insurmountable in themselves.
Given interest from the community and a willingness to adapt the architectural specifics of both systems, such barriers could be eliminated. Changes in the WebAssembly implementation itself are particularly important, as refining its key elements will be necessary for comfortable operation.
The kernel port relies on modified components—including adapted versions of Linux, LLVM, the Musl libc library, initramfs, and BusyBox. The project's source code is publicly available on GitHub, and the demo itself is hosted on GitHub Pages and can be run directly in a browser window. It runs in a minimal user environment, allowing users to explore the capabilities of WebAssembly using a full-fledged operating system as an example.
Despite its experimental status, the project illustrates the potential of WebAssembly as a universal platform for running complex system components that previously required native execution. The discussion about the porting has been posted on the LKML and has already sparked a lively reaction within the technical community. The implementation raises questions about the prospects of using WebAssembly not only for client applications but also for low-level OS components.
