BSDForums.org says, Poul-Henning Kamp has released a devfs patch for your test and review. This patch eliminates the need for atomic instructions and does away with the “overflow” table along with other updates. Back when devfs was first introduced, it was necessary to isolate the device driver context(s) from the filesystem context(s) and a lot of atomic instructions went into that. Now that MPng and various cleanups have simplified the world a bit, this patch eliminates all the atomic fireworks and does away with the “overflow” table and other nastyness. Read more.