40081: just an attempt

Author: soehms

src/sage/libs/pari/__init__.py

@@ -186,6 +186,11 @@ def _get_pari_instance():
     """
     stack_initial = 1024 * 1024
     stack_max = 1024 * stack_initial
+    try:
+        import khoca
+        stack_initial *= 16
+    except ImportError:
+        pass
     P = Pari(stack_initial, stack_max)
 
     # pari_init_opts() overrides MPIR's memory allocation functions,