Hi, I've been using eventfds to coordinate between userspace threads without any problems. I think that's relevant, although I've never tried eventfds with one end in the kernel. Specifically, I've been using multiple EFD_SEMAPHORE eventfds all added to the same epoll. These are used to communicate between threads that read messages from various sources and a main thread which processes all of them. This means all the threads need to be the same priority, which also avoids any possibility of priority inversions via the eventfds, so I have no idea if priority inversions are a potential problem or not. Hope this helps, Brian Silverman -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
