RFR: 8272447: Remove 'native' ranked Mutex

Thomas Stuefe stuefe at openjdk.java.net
Sun Aug 15 07:44:30 UTC 2021

On Fri, 13 Aug 2021 21:13:04 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.

Hi Coleen, the metaspace-related changes are fine. The others look good to me too.

Cheers, Thomas


Marked as reviewed by stuefe (Reviewer).

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

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