Index: libcfa/src/concurrency/kernel/private.hfa
===================================================================
--- libcfa/src/concurrency/kernel/private.hfa	(revision 6a4ef0c58dbf5d0381bd99ba85707bbd8e3b205a)
+++ libcfa/src/concurrency/kernel/private.hfa	(revision a757ba179bb7ccc193cf855ee3b82d2d47d342eb)
@@ -41,13 +41,4 @@
 }
 
-// Defines whether or not we *want* to use io_uring_enter as the idle_sleep blocking call
-// #define CFA_WANT_IO_URING_IDLE
-
-// Defines whether or not we *can* use io_uring_enter as the idle_sleep blocking call
-#if defined(CFA_WANT_IO_URING_IDLE) && defined(CFA_HAVE_LINUX_IO_URING_H)
-	#if defined(CFA_HAVE_IORING_OP_READ) || (defined(CFA_HAVE_READV) && defined(CFA_HAVE_IORING_OP_READV))
-		#define CFA_WITH_IO_URING_IDLE
-	#endif
-#endif
 // #define READYQ_USE_LINEAR_AVG
 #define READYQ_USE_LOGDBL_AVG
Index: libcfa/src/concurrency/kernel/startup.cfa
===================================================================
--- libcfa/src/concurrency/kernel/startup.cfa	(revision 6a4ef0c58dbf5d0381bd99ba85707bbd8e3b205a)
+++ libcfa/src/concurrency/kernel/startup.cfa	(revision a757ba179bb7ccc193cf855ee3b82d2d47d342eb)
@@ -115,7 +115,4 @@
 KERNEL_STORAGE(thread$,	             mainThread);
 KERNEL_STORAGE(__stack_t,            mainThreadCtx);
-// KERNEL_STORAGE(__scheduler_RWLock_t, __scheduler_lock);
-KERNEL_STORAGE(eventfd_t,            mainIdleEventFd);
-KERNEL_STORAGE(io_future_t,          mainIdleFuture);
 #if !defined(__CFA_NO_STATISTICS__)
 KERNEL_STORAGE(__stats_t, mainProcStats);
@@ -235,8 +232,4 @@
 	(*mainProcessor){};
 
-	mainProcessor->idle_wctx.rdbuf = &storage_mainIdleEventFd;
-	mainProcessor->idle_wctx.ftr   = (io_future_t*)&storage_mainIdleFuture;
-	/* paranoid */ verify( sizeof(storage_mainIdleEventFd) == sizeof(eventfd_t) );
-
 	__cfa_io_start( mainProcessor );
 	register_tls( mainProcessor );
@@ -384,9 +377,8 @@
 	register_tls( proc );
 
-	// used for idle sleep when io_uring is present
-	io_future_t future;
-	eventfd_t idle_buf;
-	proc->idle_wctx.ftr = &future;
-	proc->idle_wctx.rdbuf = &idle_buf;
+	// io_future_t future;
+	// eventfd_t idle_buf;
+	// proc->idle_wctx.ftr = &future;
+	// proc->idle_wctx.rdbuf = &idle_buf;