A very large portion of the Linux kernel code can't even run in userspace. It's not your average software project. Here's one integration test project: https:/

A very large portion of the Linux kernel code can't even run in userspace. It's not your average software project. Here's one integration test project: https://linux-test-project.github.io/ https://linux-test-project.github.io/ -- typically (non-platform) subsystem maintainers write their own stress tests. But stress tests are merely probabilistic.