--- old/src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.cpp	2013-05-20 22:05:24.000000000 +0200
+++ new/src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.cpp	2013-05-20 22:05:24.000000000 +0200
@@ -285,6 +285,7 @@
       _bt.verify_not_unallocated((HeapWord*)fc, fc->size());
       _indexedFreeList[mr.word_size()].return_chunk_at_head(fc);
     }
+    coalBirth(mr.word_size());
   }
   _promoInfo.reset();
   _smallLinearAllocBlock._ptr = NULL;