Summary

Deprecate the unused G1RSetScanBlockSize command line option.

Problem

JDK-8213108 removed the code that used the G1SetScanBlockSize product command line option as the algorithm that used it has been completely replaced and does not need it at all.

Solution

Start the removal process by deprecating the G1RSetScanBlockSize command line option in JDK 14.

Specification

--- a/src/hotspot/share/runtime/arguments.cpp   Thu Sep 26 21:57:29 2019 +0200
+++ b/src/hotspot/share/runtime/arguments.cpp   Fri Sep 27 12:01:07 2019 +0200
@@ -534,6 +534,7 @@
   { "FieldsAllocationStyle",        JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
   { "CompactFields",                JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
   { "MonitorBound",                 JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
+  { "G1RSetScanBlockSize",          JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
 
   // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
   { "DefaultMaxRAMFraction",        JDK_Version::jdk(8),  JDK_Version::undefined(), JDK_Version::undefined() },