8222271: [s390] optimize register usage in C2 instruction forms for clearing arrays Reviewed-by: mdoerr, lucy

8163363: AArch64: Stack size in tools/launcher/Settings.java needs to be adjusted Summary: Specify a proper min stack size input to -Xss for aarch64 Reviewed-by: aph

8222430: Add tests for ElementKind predicates Reviewed-by: jjg

8222378: Provide mechanism to query preview feature status for annotation processors Reviewed-by: jjg

8222501: [TESTBUG] Docker support is always set to true in jtreg-ext/requires/VMProps.java Summary: Restored prior code Reviewed-by: dcubed

8221711: [TESTBUG] create more tests for JFR in container environment Summary: Added test cases for environment and network events Reviewed-by: egahlin

8222425: Shenandoah: Move commonly used closures to separate files Reviewed-by: shade

8222490: Shenandoah: Remove unused _par_state_string in ShenandoahRootEvacuator Reviewed-by: shade

8222397: x86_32 tests with UseSHA1Intrinsics SEGV due to garbled registers Reviewed-by: kvn, dsamersoff

8222410: java/nio/file/attribute/BasicFileAttributeView/UnixSocketFile hangs when "nc" does not accept "-U" Reviewed-by: alanb

8221397: Support implementation-defined Map Modes Summary: Allow implementation-defined extensions to FileChannel MapMode enum Reviewed-by: alanb

8221644: jquery directory should be renamed Reviewed-by: jjg

8220625: tools/javac/classreader/8171132/BadConstantValue.java failed with "did not see expected error" Reviewed-by: clanger

8222387: Out-of-bounds access to CPU _family_id_xxx array Reviewed-by: dholmes, kvn Contributed-by: Jinke Fan <fanjinke51@yeah.net>