mercurial/configitems.py

--- a/mercurial/configitems.py	Fri Jun 19 06:15:06 2020 +0200
+++ b/mercurial/configitems.py	Mon Sep 14 11:32:24 2020 -0400
@@ -793,6 +793,9 @@
     b'fsmonitor', b'warn_update_file_count', default=50000,
 )
 coreconfigitem(
+    b'fsmonitor', b'warn_update_file_count_rust', default=400000,
+)
+coreconfigitem(
     b'help', br'hidden-command\..*', default=False, generic=True,
 )
 coreconfigitem(