Index: libcfa/src/concurrency/io.cfa
===================================================================
--- libcfa/src/concurrency/io.cfa	(revision 1268ad8ea58487a8428bbedb6801b68c2ddd7c85)
+++ libcfa/src/concurrency/io.cfa	(revision 1539bbdb91258b39bd5f38e1d4e9b88fb0a17547)
@@ -372,4 +372,6 @@
 		verify( (*ring.completion_q.head) == (*ring.completion_q.tail) );
 
+		__cfadbg_print_safe(io_core, "Kernel I/O : Slow poller for ring %p ready\n", &ring);
+
 		while(!__atomic_load_n(&ring.done, __ATOMIC_SEQ_CST)) {
 			#if defined(__CFA_IO_POLLING_USER__)
@@ -392,4 +394,6 @@
 		}
 
+		__cfadbg_print_safe(io_core, "Kernel I/O : Slow poller for ring %p stopping\n", &ring);
+
 		return 0p;
 	}
@@ -399,4 +403,6 @@
 			// Start parked
 			park( __cfaabi_dbg_ctx );
+
+			__cfadbg_print_safe(io_core, "Kernel I/O : Fast poller for ring %p ready\n", &this.ring);
 
 			// Then loop until we need to start
@@ -414,4 +420,6 @@
 				}
 			}
+
+			__cfadbg_print_safe(io_core, "Kernel I/O : Fast poller for ring %p stopping\n", &this.ring);
 		}
 	#endif