x

kernel/proc.c

@@ -450,7 +450,8 @@ scheduler(void)
   c->proc = 0;
   for(;;){
     // The most recent process to run may have had interrupts
-    // turned off; turn them on to avoid deadlock.
+    // turned off; enable them to avoid a deadlock if all
+    // processes are waiting.
     intr_on();
 
     for(p = proc; p < &proc[NPROC]; p++) {