While all of the major new features in the FreeBSD world are queued up for FreeBSD 10.0, FreeBSD 9.2 has its share of improvements:
- FreeBSD's ZFS file-system implementation now supports TRIM for solid-state drives (SSDs) and separately it also supports LZ4 transparent file-system compression.
- VirtIO drivers are now part of the i386 and AMD64 generic kernel configurations.
- DTrace hooks are on by default for the FreeBSD generic kernel. DTrace was also updated to version 1.9.0.
- Unmapped I/O support has been brought in from the latest FreeBSD head code.
The FreeBSD 9.2 release announcement can be viewed at FreeBSD.org.