--- a/hotspot/src/os_cpu/windows_x86/vm/os_windows_x86.cpp	Wed Sep 03 14:39:13 2014 +0200
+++ b/hotspot/src/os_cpu/windows_x86/vm/os_windows_x86.cpp	Thu Sep 04 13:11:25 2014 +0400
@@ -639,3 +639,8 @@
 #endif
 }
 #endif
+
+int os::extra_bang_size_in_bytes() {
+  // JDK-8050147 requires the full cache line bang for x86.
+  return VM_Version::L1_line_size();
+}