For the last couple of weeks, I’ve been playing on a PoC implementation of a file system for the Linux kernel. The goal is to address a fundamental limitation in how container images are stored: the existing overlay model deduplicates at the layer level, but once you want per-file deduplication — so that identical files across different images share a single copy on disk and in the page cache — the current architecture gets in the way and requires awkward workarounds involving hard links or filesystem-specific reflinks.

The giuseppe/crun github project was moved under https://github.com/containers/crun. Moving to the containers organization means the project is no longer a personal experiment but a community-maintained component of the container stack, alongside tools like Podman, Buildah, and fuse-overlayfs. This makes it easier to coordinate changes across the ecosystem and signals that crun is a supported alternative OCI runtime for production use.

Similarly libocispec, used internally by crun for parsing the OCI configuration file was moved to https://github.com/containers/libocispec