*** old/src/share/vm/memory/threadLocalAllocBuffer.hpp	Tue Aug 16 10:00:32 2011
--- new/src/share/vm/memory/threadLocalAllocBuffer.hpp	Tue Aug 16 10:00:32 2011

*** 122,142 ****
--- 122,133 ----
    inline HeapWord* allocate(size_t size);
  
    // Reserve space at the end of TLAB
    static size_t end_reserve() {
      int reserve_size = typeArrayOopDesc::header_size(T_INT);
      if (AllocatePrefetchStyle == 3) {
        // BIS is used to prefetch - we need a space for it.
        // +1 for rounding up to next cache line +1 to be safe
        int lines = AllocatePrefetchLines + 2;
        int step_size = AllocatePrefetchStepSize;
        int distance = AllocatePrefetchDistance;
        int prefetch_end = (distance + step_size*lines)/(int)HeapWordSize;
        reserve_size = MAX2(reserve_size, prefetch_end);
+     return MAX2(reserve_size, VM_Version::reserve_for_allocation_prefetch());
    }
      return reserve_size;
    }
    static size_t alignment_reserve()              { return align_object_size(end_reserve()); }
    static size_t alignment_reserve_in_bytes()     { return alignment_reserve() * HeapWordSize; }
  
    // Return tlab size or remaining space in eden such that the
    // space is large enough to hold obj_size and necessary fill space.