--- a/hotspot/src/share/vm/runtime/arguments.cpp	Thu Mar 28 10:27:28 2013 +0100
+++ b/hotspot/src/share/vm/runtime/arguments.cpp	Wed Mar 27 19:21:18 2013 +0100
@@ -1552,6 +1552,15 @@
   }
 }
 
+julong Arguments::limit_by_allocatable_memory(julong limit) {
+  julong max_allocatable;
+  julong result = limit;
+  if (os::has_allocatable_memory_limit(&max_allocatable)) {
+    result = MIN2(result, max_allocatable / MaxVirtMemFraction);
+  }
+  return result;
+}
+
 void Arguments::set_heap_size() {
   if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) {
     // Deprecated flag
@@ -1590,12 +1599,12 @@
       }
       reasonable_max = MIN2(reasonable_max, max_coop_heap);
     }
-    reasonable_max = os::allocatable_physical_memory(reasonable_max);
+    reasonable_max = limit_by_allocatable_memory(reasonable_max);
 
     if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
       // An initial heap size was specified on the command line,
       // so be sure that the maximum size is consistent.  Done
-      // after call to allocatable_physical_memory because that
+      // after call to limit_by_allocatable_memory because that
       // method might reduce the allocation size.
       reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
     }
@@ -1615,14 +1624,14 @@
 
     reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
 
-    reasonable_minimum = os::allocatable_physical_memory(reasonable_minimum);
+    reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
 
     julong reasonable_initial = phys_mem / InitialRAMFraction;
 
     reasonable_initial = MAX2(reasonable_initial, reasonable_minimum);
     reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
 
-    reasonable_initial = os::allocatable_physical_memory(reasonable_initial);
+    reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
 
     if (PrintGCDetails && Verbose) {
       // Cannot use gclog_or_tty yet.
@@ -2608,9 +2617,7 @@
       initHeapSize = MIN2(total_memory / (julong)2,
                           total_memory - (julong)160*M);
 
-      // Make sure that if we have a lot of memory we cap the 32 bit
-      // process space.  The 64bit VM version of this function is a nop.
-      initHeapSize = os::allocatable_physical_memory(initHeapSize);
+      initHeapSize = limit_by_allocatable_memory(initHeapSize);
 
       if (FLAG_IS_DEFAULT(MaxHeapSize)) {
          FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize);