diff --git a/mercurial/pure/parsers.py b/mercurial/pure/parsers.py
--- a/mercurial/pure/parsers.py
+++ b/mercurial/pure/parsers.py
@@ -156,6 +156,14 @@
         index."""
         return nodemaputil.persistent_data(self)
 
+    def update_nodemap_data(self, nm_data):
+        """provide full blokc of persisted binary data for a nodemap
+
+        The data are expected to come from disk. See `nodemap_data_all` for a
+        produceur of such data."""
+        if nm_data is not None:
+            nodemaputil.parse_data(nm_data)
+
 
 class InlinedIndexObject(BaseIndexObject):
     def __init__(self, data, inline=0):
diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -626,6 +626,16 @@
             self._io = rustrevlogio()
         try:
             d = self._io.parseindex(indexdata, self._inline)
+            index, _chunkcache = d
+            use_nodemap = (
+                not self._inline
+                and self.nodemap_file is not None
+                and util.safehasattr(index, 'update_nodemap_data')
+            )
+            if use_nodemap:
+                nodemap_data = nodemaputil.persisted_data(self)
+                if nodemap_data is not None:
+                    index.update_nodemap_data(nodemap_data)
         except (ValueError, IndexError):
             raise error.RevlogError(
                 _(b"index %s is corrupted") % self.indexfile