Hi, I just released LTTng 0.86 for kernel 2.6.28.1, which includes a x86_64 lockdep irq tracer fix in entry_64.S which makes sure the lockdep irq flag tracking works properly. Mathieu -- Mathieu Desnoyers OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68