RFR: 8272447: Remove 'native' ranked Mutex

Coleen Phillimore coleenp at openjdk.java.net
Thu Aug 19 14:27:24 UTC 2021

On Sun, 15 Aug 2021 07:41:52 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> See JBS issue for more details.  The locks that were native ranking should have a real mutex ranking and participate in the deadlock detection mechanism.  The MonitoringSupport_lock is taken out after the Notification_lock, which is aliased to the Service_lock if -XX:-UseNotificationThread.  Service_lock is ranked tty-2 which is the same as access rank, so I made a new service rank for these two locks to share.  As a future change we should verify that rank+-number doesn't overlap with a different rank.
>> Tested with tier1-6 in mach5.
> Hi Coleen, the metaspace-related changes are fine. The others look good to me too.
> Cheers, Thomas

Thanks @tstuefe for reviewing!


PR: https://git.openjdk.java.net/jdk/pull/5116

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