FreeBSD 5.1

• Features

  • PAE, NSS, libkse, libthr, HTT, amd64, NFS locking, jail management, lazy context switch, SCHED_ULE, dynamic major numbers, EHCI, various USB network drivers, reduced tcp state on connection close, volume labels on UFS and UFS2, / on vinum, DIRECTIO, dump snapshots, thread-safe rtld, ACPI updates, ...

• More stability, performance

  • Lock pushdowns
  • Much broader exposure, testing