--- old/src/hotspot/share/gc/g1/g1CollectedHeap.cpp	2018-05-09 00:05:44.710207148 +0200
+++ new/src/hotspot/share/gc/g1/g1CollectedHeap.cpp	2018-05-09 00:05:44.564208958 +0200
@@ -62,6 +62,7 @@
 #include "gc/g1/heapRegionSet.inline.hpp"
 #include "gc/g1/vm_operations_g1.hpp"
 #include "gc/shared/adaptiveSizePolicy.hpp"
+#include "gc/shared/collectedHeap.inline.hpp"
 #include "gc/shared/gcHeapSummary.hpp"
 #include "gc/shared/gcId.hpp"
 #include "gc/shared/gcLocker.hpp"
@@ -392,10 +393,14 @@
 }
 
 HeapWord*
-G1CollectedHeap::mem_allocate(size_t word_size,
+G1CollectedHeap::mem_allocate(size_t word_size, Klass* klass, Thread* thread,
                               bool*  gc_overhead_limit_was_exceeded) {
   assert_heap_not_locked_and_not_at_safepoint();
 
+  HeapWord* obj = allocate_from_tlab(klass, thread, word_size);
+  if (obj != NULL) {
+    return obj;
+  }
   if (is_humongous(word_size)) {
     return attempt_allocation_humongous(word_size);
   }