Right. I’ve never worked in the kernel space, but I wanted to understand the author. As you mentioned, event handlers still only care for certain messages and

Right. I’ve never worked in the kernel space, but I wanted to understand the author. As you mentioned, event handlers still only care for certain messages and ignore others, so the disambiguation must happen. Rereading it; what’s also not clear to me is whether epoll is a single queue, or one queue for each subsystem and handle type. From a handler’s perspective, it seems like an implementation detail? Again, I don’t know about this stuff; just hoping someone knowledgeable can help clear it up.