Guest post by systemd, the new init system created by Lennart Poettering, has added a couple of interesting features. First, he has added support for chroot-style isolation capabilities, but instead of chroot he used the powerful per-process filesystem and PID namespaces supported by the Linux kernel. Second, he has added a new tool, systemd-analyze, which shows how much time took each service to start, so you can optimize your bootup time easily. It can even create simple bootchart-style graphs.
… is it supported now?
Nope
Refer to
http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
There is nothing systemd specific about it and systemd in fact is perfectly fine with a separate /usr partition.
Cool! I like SystemD, is nice.