There does seem to be a problem with broadcast on some kernels - I can confirm (yes, you already knew that but I've seen it for myself now!) If you try to create a lockspace (eg using one of the dlm/tests/usertest programs) and the thing hangs with SM: send_broadcast_message error -13 SM: send_broadcast_message error -13 SM: send_broadcast_message error -13 on the console, then I have what you're seeing. I'm working on it... -- patrick