--- old/src/hotspot/share/gc/z/zPageAllocator.cpp	2020-05-18 16:30:52.114937169 +0200
+++ new/src/hotspot/share/gc/z/zPageAllocator.cpp	2020-05-18 16:30:51.850928617 +0200
@@ -105,7 +105,7 @@
                                size_t max_reserve) :
     _lock(),
     _virtual(max_capacity),
-    _physical(),
+    _physical(max_capacity),
     _cache(),
     _min_capacity(min_capacity),
     _max_capacity(max_capacity),