Index: src/libcfa/concurrency/kernel
===================================================================
--- src/libcfa/concurrency/kernel	(revision de6319f37ab741ed2ba4232a93ee62c240717bcd)
+++ src/libcfa/concurrency/kernel	(revision b4a835dd16cbb368bdb18250055a0e85c62e213c)
@@ -53,4 +53,7 @@
 	// Preemption rate on this cluster
 	Duration preemption_rate;
+
+	// List of idle processors
+	// __dllist_t(struct processor) idles;
 };
 
@@ -124,4 +127,9 @@
 	bool pending_preemption;
 
+	struct {
+		pthread_mutex_t lock;
+		pthread_cond_t  cond;
+	} idle;
+
 #ifdef __CFA_DEBUG__
 	// Last function to enable preemption on this processor