diff -r f9643f2771bc -r 0c3b36b3e812 src/mem/simple_dram.cc
--- a/src/mem/simple_dram.cc	Tue Feb 19 14:43:35 2013 +0000
+++ b/src/mem/simple_dram.cc	Tue Feb 19 14:44:19 2013 +0000
@@ -396,8 +396,11 @@
     }
 
     // Once you're done emptying the write queue, check if there's
-    // anything in the read queue, and call schedule if required
-    schedule(nextReqEvent, busBusyUntil);
+    // anything in the read queue, and call schedule if required. The
+    // retry above could already have caused it to be scheduled, so
+    // first check
+    if (!nextReqEvent.scheduled())
+        schedule(nextReqEvent, busBusyUntil);
 }
 
 void