diff -r c97db0855565 -r 758c07667682 src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp
--- a/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp	Tue Feb 04 17:38:01 2020 +0800
+++ b/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp	Tue Feb 04 18:13:14 2020 +0800
@@ -376,7 +376,7 @@
                              MAX2((uint) (MaxNewSize / HeapRegion::GrainBytes),
                                   1U);
       _sizer_kind = SizerMaxAndNewSize;
-      _adaptive_size = _min_desired_young_length == _max_desired_young_length;
+      _adaptive_size = _min_desired_young_length != _max_desired_young_length;
     } else {
       _sizer_kind = SizerNewSizeOnly;
     }