src/share/vm/gc_implementation/g1/g1PageBasedVirtualSpace.cpp

rev 7555 : imported patch 8067469-g1-ignores-alwayspretouch

@@ -129,10 +129,13 @@
                               err_msg("Failed to commit pages from "SIZE_FORMAT" of length "SIZE_FORMAT, start, size_in_pages));
   }
   _committed.set_range(start, start + size_in_pages);
 
   MemRegion result((HeapWord*)page_start(start), byte_size_for_pages(size_in_pages) / HeapWordSize);
+  if (AlwaysPreTouch) {
+    os::pretouch_memory((char*)result.start(), (char*)result.end());
+  }
   return result;
 }
 
 MemRegion G1PageBasedVirtualSpace::uncommit(uintptr_t start, size_t size_in_pages) {
   guarantee(is_area_committed(start, size_in_pages), "checking");