RFR: 8319251: [REDO] Change LockingMode default from LM_LEGACY to LM_LIGHTWEIGHT

[Daniel D. Daugherty]

On Tue, 20 Feb 2024 16:40:05 GMT, Daniel D. Daugherty <dcubed at openjdk.org> wrote:

> A fix to change LockingMode default from LM_LEGACY to LM_LIGHTWEIGHT.

These changes were tested with Mach5 Tier{1-8} testing. See
https://bugs.openjdk.org/browse/JDK-8319251?focusedId=14657916&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14657916

I'm also running stress testing, but those runs won't be complete until late Monday or Tuesday
next week.

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PR Comment: https://git.openjdk.org/jdk/pull/17932#issuecomment-2002523614