I took a break from sending Kerbals across the solar system to update modern-xiafs to work with the 3.11.1 Linux kernel. This, I’m happy to say, was a small and quick update; the only changes needed were to xiafs_readdir because they went and changed the directory operations in the kernel subtly for some reason.
There isn’t anything of note here otherwise. Xiafs seems to work as expected with no currently known gotchas. There are many reasons you wouldn’t want to use it in production, but it’s less likely to set your system on fire now (although of course I can’t promise that it won’t).