Summary

Change experimental flag "LockingMode" to regular product flag.

Problem

The enhancement JDK-8291555 has introduced the experimental option "LockingMode" which improves performance in some scenarios. It is currently not supported in production, so, customers can't benefit from it.

Solution

Make the flag a regular product flag.

Specification

-    product(int, LockingMode, LM_LEGACY, EXPERIMENTAL,                         \
+    product(int, LockingMode, LM_LEGACY,                                       \
              "Select locking mode: "                                           \
              "0: monitors only (LM_MONITOR), "                                 \
              "1: monitors & legacy stack-locking (LM_LEGACY, default), "       \
              "2: monitors & new lightweight locking (LM_LIGHTWEIGHT)")         \
              range(0, 2)                                                       \