--- old/src/share/vm/gc_implementation/g1/g1HotCardCache.cpp	2014-08-11 10:12:31.221843864 +0200
+++ new/src/share/vm/gc_implementation/g1/g1HotCardCache.cpp	2014-08-11 10:12:31.137845940 +0200
@@ -44,9 +44,7 @@
     _hot_cache_idx = 0;
 
     // For refining the cards in the hot cache in parallel
-    uint n_workers = (ParallelGCThreads > 0 ?
-                        _g1h->workers()->total_workers() : 1);
-    _hot_cache_par_chunk_size = MAX2(1, _hot_cache_size / (int)n_workers);
+    _hot_cache_par_chunk_size = (ParallelGCThreads > 0 ? 32 : _hot_cache_size);
     _hot_cache_par_claimed_idx = 0;
 
     _card_counts.initialize();