--- a/mercurial/configitems.py Fri Jun 30 03:45:59 2017 +0200
+++ b/mercurial/configitems.py Fri Jun 30 03:46:00 2017 +0200
@@ -161,3 +161,6 @@
coreconfigitem('worker', 'backgroundcloseminfilecount',
default=2048,
)
+coreconfigitem('worker', 'backgroundclosethreadcount',
+ default=4,
+)