[LAD] Writing to an eventfd from a realtime thread

Hey everybody, I've got this audio app I'm writing which uses message passing to communicate between threads (similar to the actor model). A message channel consists of a ring-buffer for the actual message storage, and then an eventfd so that a thread can block on its channel (or, importantly, several). At the moment, when the audio thread (the JACK callback) needs to send a message over a channel to another thread, it follows the common codepath of appending the message to the channel's ring-buffer and then write()ing to the eventfd. I suspect this is not real-time safe, but is it something I should lose sleep over? -w