.

bigfile/file_zodb.py

@@ -781,9 +781,8 @@ class _ZBigFileH(object):
     def invalidate_page(self, pgoffset):
         return self.zfileh.invalidate_page(pgoffset)
 
-    @property
     def uses_mmap_overlay(self):
-        return self.zfileh.uses_mmap_overlay
+        return self.zfileh.uses_mmap_overlay()
 
 
     # ~~~~ ISynchronizer ~~~~

bigfile/tests/test_filezodb.py

@@ -139,7 +139,7 @@ def test_bigfile_filezodb():
     # evict all loaded pages and test loading them again
     # (verifies ZBlk.loadblkdata() & loadblk logic when loading data the second time)
     reclaimed = ram_reclaim_all()
-    if fh.uses_mmap_overlay:
+    if fh.uses_mmap_overlay():
         assert reclaimed == 0
     else:
         assert reclaimed >= blen    # XXX assumes pagesize=blksize