RFR: 8272447: Remove 'native' ranked Mutex [v3]

Coleen Phillimore coleenp at openjdk.java.net
Wed Aug 25 13:30:28 UTC 2021

On Fri, 20 Aug 2021 13:17:44 GMT, Coleen Phillimore <coleenp 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.
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
>   revert copyright on file that I didn't end up changing.

Thanks Thomas and Patricio for reviews and David for comments.  This is blocking another change so I'm going to integrate.


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

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