# HG changeset patch
# User coleenp
# Date 1383243062 14400
# Node ID 067dd79671286b07558f7b6c85f1e0f54738edcd
# Parent  cf4ca6e73f1ce01c6aaa74ea27078c0114d4ad08
8027616: Off by one error in putback for compressed oops nashorn performance improvement
Summary: Should compare bounds greater than or equal 4G when deciding if shift is needed or CDS area + compressed class space are within 4G of each other.
Reviewed-by: stefank, hseigel, zgu

diff -r cf4ca6e73f1c -r 067dd7967128 hotspot/src/share/vm/memory/metaspace.cpp
--- a/hotspot/src/share/vm/memory/metaspace.cpp	Wed Oct 30 09:26:44 2013 -0700
+++ b/hotspot/src/share/vm/memory/metaspace.cpp	Thu Oct 31 14:11:02 2013 -0400
@@ -2869,7 +2869,7 @@
 
   Universe::set_narrow_klass_base(lower_base);
 
-  if ((uint64_t)(higher_address - lower_base) < UnscaledClassSpaceMax) {
+  if ((uint64_t)(higher_address - lower_base) <= UnscaledClassSpaceMax) {
     Universe::set_narrow_klass_shift(0);
   } else {
     assert(!UseSharedSpaces, "Cannot shift with UseSharedSpaces");
@@ -2885,7 +2885,7 @@
   address lower_base = MIN2((address)metaspace_base, cds_base);
   address higher_address = MAX2((address)(cds_base + FileMapInfo::shared_spaces_size()),
                                 (address)(metaspace_base + compressed_class_space_size()));
-  return ((uint64_t)(higher_address - lower_base) < UnscaledClassSpaceMax);
+  return ((uint64_t)(higher_address - lower_base) <= UnscaledClassSpaceMax);
 }
 
 // Try to allocate the metaspace at the requested addr.