Hi, Does anybody run with the kernel option ADAPTIVE_MUTEXES in RELENG_5 yet? Is it safe to use or should be used with care? Anybody also using INVARIANTS? The networking stack is already mpsafe i guess, at least by default on RELENG_5 i notice: debug.mpsafenet: 1 The em driver is also giant free or not yet? Bye, Mipam.