use coroutine/task id

Author: loongs-zhang

core/src/net/event_loop.rs

@@ -304,7 +304,7 @@ impl<'e> EventLoop<'e> {
             // have already consumed all pending SQEs, making `_count == 0` even
             // when completed CQEs are sitting in the completion queue.
             for cqe in &mut cq {
-                let token = u64::try_from(cqe.user_data()).expect("token overflow");
+                let token = cqe.user_data();
                 if crate::common::constants::IO_URING_TIMEOUT_USERDATA == token {
                     continue;
                 }