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===== 2. Map Illumos Features to FreeBSD =====
* '''cgroups''': Start by reviewing <code>lx_cgroups.c</code>. You could either:
** Implement a minimal cgroups shim in the Linuxulator that maps to FreeBSD’s <code>rctl</code> or a new subsystem.
** Port Illumos’s cgroups implementation directly, adapting it to FreeBSD’s kernel architecture.
* '''Namespaces''': Look at <code>lx_namespace.c</code>. FreeBSD jails and VNET provide a foundation, but you’d need to extend the Linuxulator to handle <code>clone()</code> and <code>unshare()</code> with namespace flags, possibly by mapping them to jail-like constructs.
* '''System Calls''': Compare Illumos’s <code>lx_syscalls.c</code> with FreeBSD’s <code>sys/compat/linux/linux_sysent.c</code>. Add missing syscalls (e.g., <code>pidfd_open()</code>, <code>clone3()</code>) by adapting Illumos’s implementations or writing new ones based on Linux kernel source (e.g., from kernel.org).
* '''Fanotify''': Use <code>lx_fanotify.c</code> as a model to build a translation layer from <code>fanotify</code> to <code>kqueue</code>.