Index: libcfa/src/concurrency/io.cfa
===================================================================
--- libcfa/src/concurrency/io.cfa	(revision e8616b6271f88a2d29036c310ad330f23fbd5136)
+++ libcfa/src/concurrency/io.cfa	(revision 7ce88736e34bf185c4d55149f3117c28e91f9106)
@@ -432,4 +432,5 @@
 
 		disable_interrupts();
+		__STATS__( true, if(!lazy) io.submit.eagr += 1; )
 		processor * proc = __cfaabi_tls.this_processor;
 		$io_context * ctx = proc->io.ctx;
Index: libcfa/src/concurrency/io/call.cfa.in
===================================================================
--- libcfa/src/concurrency/io/call.cfa.in	(revision e8616b6271f88a2d29036c310ad330f23fbd5136)
+++ libcfa/src/concurrency/io/call.cfa.in	(revision 7ce88736e34bf185c4d55149f3117c28e91f9106)
@@ -34,4 +34,5 @@
 #include "kernel.hfa"
 #include "io/types.hfa"
+#include "stats.hfa"
 
 //=============================================================================================
@@ -226,5 +227,7 @@
 	async_{name}( future, {args}, submit_flags );
 
-	wait( future );
+	__attribute__((unused)) bool parked;
+	parked = wait( future );
+	__STATS__(false, if(!parked) io.submit.nblk += 1; )
 	if( future.result < 0 ) {{
 		errno = -future.result;
Index: libcfa/src/concurrency/io/setup.cfa
===================================================================
--- libcfa/src/concurrency/io/setup.cfa	(revision e8616b6271f88a2d29036c310ad330f23fbd5136)
+++ libcfa/src/concurrency/io/setup.cfa	(revision 7ce88736e34bf185c4d55149f3117c28e91f9106)
@@ -229,6 +229,4 @@
 		#if !defined(CFA_WITH_IO_URING_IDLE)
 			// Step 4 : eventfd
-			// io_uring_register is so f*cking slow on some machine that it
-			// will never succeed if preemption isn't hard blocked
 			__cfadbg_print_safe(io_core, "Kernel I/O : registering %d for completion with ring %d\n", procfd, fd);
 
@@ -240,4 +238,19 @@
 			__cfadbg_print_safe(io_core, "Kernel I/O : registered %d for completion with ring %d\n", procfd, fd);
 		#endif
+
+		// #if defined(CFA_HAVE_IORING_REGISTER_IOWQ_MAX_WORKERS)
+		// 	// Step 5 : max worker count
+		// 	__cfadbg_print_safe(io_core, "Kernel I/O : lmiting max workers for ring %d\n", fd);
+
+		// 	unsigned int maxes[2];
+		// 	maxes[0] = 64; // max number of bounded workers (Regular files / block)
+		// 	maxes[1] = 64;  // max number of unbounded workers (IOSQE_ASYNC)
+		// 	int ret = syscall( __NR_io_uring_register, fd, IORING_REGISTER_IOWQ_MAX_WORKERS, maxes, 2);
+		// 	if (ret < 0) {
+		// 		abort("KERNEL ERROR: IO_URING MAX WORKER REGISTER - %s\n", strerror(errno));
+		// 	}
+
+		// 	__cfadbg_print_safe(io_core, "Kernel I/O : lmited max workers for ring %d\n", fd);
+		// #endif
 
 		// some paranoid checks
Index: libcfa/src/concurrency/stats.cfa
===================================================================
--- libcfa/src/concurrency/stats.cfa	(revision e8616b6271f88a2d29036c310ad330f23fbd5136)
+++ libcfa/src/concurrency/stats.cfa	(revision 7ce88736e34bf185c4d55149f3117c28e91f9106)
@@ -46,4 +46,6 @@
 			stats->io.submit.fast       = 0;
 			stats->io.submit.slow       = 0;
+			stats->io.submit.eagr       = 0;
+			stats->io.submit.nblk       = 0;
 			stats->io.flush.external    = 0;
 			stats->io.flush.dirty       = 0;
@@ -116,4 +118,6 @@
 			tally_one( &cltr->io.submit.fast      , &proc->io.submit.fast       );
 			tally_one( &cltr->io.submit.slow      , &proc->io.submit.slow       );
+			tally_one( &cltr->io.submit.eagr      , &proc->io.submit.eagr       );
+			tally_one( &cltr->io.submit.nblk      , &proc->io.submit.nblk       );
 			tally_one( &cltr->io.flush.external   , &proc->io.flush.external    );
 			tally_one( &cltr->io.flush.dirty      , &proc->io.flush.dirty       );
@@ -197,4 +201,6 @@
 					sstr | "fast," | eng3(io.submit.slow) | "slow (" | ws(3, 3, avgfasts) | "%)" | nonl;
 				}
+				sstr | " - eager" | eng3(io.submit.eagr) | nonl;
+				sstr | " - no-wait" | eng3(io.submit.nblk) | nonl;
 				sstr | nl;
 
Index: libcfa/src/concurrency/stats.hfa
===================================================================
--- libcfa/src/concurrency/stats.hfa	(revision e8616b6271f88a2d29036c310ad330f23fbd5136)
+++ libcfa/src/concurrency/stats.hfa	(revision 7ce88736e34bf185c4d55149f3117c28e91f9106)
@@ -92,4 +92,6 @@
 				volatile uint64_t fast;
 				volatile uint64_t slow;
+				volatile uint64_t eagr;
+				volatile uint64_t nblk;
 			} submit;
 			struct {