An anonymous reader wrote in with a story on OS News about the latest release of the Genode Microkernel OS Framework. Brought to you by the research labs at TU Dresden, Genode is based on the L4 microkernel and aims to provide a framework for writing multi-server operating systems (think the Hurd, but with even device drivers as userspace tasks). Until recently, the primary use of L4 seems to have been as a glorified Hypervisor for Linux, but now that's changing: the Genode example OS can build itself on itself: "Even though there is a large track record of individual programs and libraries ported to the environment, those programs used to be self-sustaining applications that require only little interaction with other programs. In contrast, the build system relies on many utilities working together using mechanisms such as files, pipes, output redirection, and execve. The Genode base system does not come with any of those mechanisms let alone the subtle semantics of the POSIX interface as expected by those utilities. Being true to microkernel principles, Genode's API has a far lower abstraction level and is much more rigid in scope." The detailed changelog has information on the huge architectural overhaul of this release. One thing this release features that Hurd still doesn't have: working sound support. For those unfamiliar with multi-server systems, the project has a brief conceptual overview document.
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