--- a/src/hotspot/share/services/virtualMemoryTracker.cpp	Tue Mar 06 17:15:16 2018 -0500
+++ b/src/hotspot/share/services/virtualMemoryTracker.cpp	Tue Mar 06 17:45:31 2018 -0500
@@ -38,12 +38,6 @@
   ::new ((void*)_snapshot) VirtualMemorySnapshot();
 }
 
-void VirtualMemorySummary::snapshot(VirtualMemorySnapshot* s) {
-  // Snapshot current thread stacks
-  VirtualMemoryTracker::snapshot_thread_stacks();
-  as_snapshot()->copy_to(s);
-}
-
 SortedLinkedList<ReservedMemoryRegion, compare_reserved_region_base>* VirtualMemoryTracker::_reserved_regions;
 
 int compare_committed_region(const CommittedMemoryRegion& r1, const CommittedMemoryRegion& r2) {
@@ -292,26 +286,6 @@
   }
 }
 
-address ReservedMemoryRegion::thread_stack_uncommitted_bottom() const {
-  assert(flag() == mtThreadStack, "Only for thread stack");
-  LinkedListNode<CommittedMemoryRegion>* head = _committed_regions.head();
-  address bottom = base();
-  address top = base() + size();
-  while (head != NULL) {
-    address committed_top = head->data()->base() + head->data()->size();
-    if (committed_top < top) {
-      // committed stack guard pages, skip them
-      bottom = head->data()->base() + head->data()->size();
-      head = head->next();
-    } else {
-      assert(top == committed_top, "Sanity");
-      break;
-    }
-  }
-
-  return bottom;
-}
-
 bool VirtualMemoryTracker::initialize(NMT_TrackingLevel level) {
   if (level >= NMT_summary) {
     VirtualMemorySummary::initialize();
@@ -486,32 +460,6 @@
   }
 }
 
-// Walk all known thread stacks, snapshot their committed ranges.
-class SnapshotThreadStackWalker : public VirtualMemoryWalker {
-public:
-  SnapshotThreadStackWalker() {}
-
-  bool do_allocation_site(const ReservedMemoryRegion* rgn) {
-    if (rgn->flag() == mtThreadStack) {
-      address stack_bottom = rgn->thread_stack_uncommitted_bottom();
-      size_t stack_size = rgn->base() + rgn->size() - stack_bottom;
-      size_t committed_size = os::committed_stack_size(stack_bottom, stack_size);
-      if (committed_size > 0) {
-        ReservedMemoryRegion* region = const_cast<ReservedMemoryRegion*>(rgn);
-        NativeCallStack ncs; // empty stack
-
-        // Stack grows downward
-        region->add_committed_region(rgn->base() + rgn->size() - committed_size, committed_size, ncs);
-      }
-    }
-    return true;
-  }
-};
-
-void VirtualMemoryTracker::snapshot_thread_stacks() {
-  SnapshotThreadStackWalker walker;
-  walk_virtual_memory(&walker);
-}
 
 bool VirtualMemoryTracker::walk_virtual_memory(VirtualMemoryWalker* walker) {
   assert(_reserved_regions != NULL, "Sanity check");