RFR: 8256302: releasing oopStorage when deflating allows for faster deleting [v3]

[Daniel D. Daugherty]

On Mon, 22 May 2023 20:02:21 GMT, Daniel D. Daugherty <dcubed at openjdk.org> wrote:

>> Releasing ObjectMonitor oopStorage earlier when deflating allows ObjectMonitor
>> deletion by a JavaThread (usually the MonitorDeflationThread) to happen while a
>> ThreadBlockInVM helper is in place. This should improve time-to-safepoint.
>
> Daniel D. Daugherty has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:
> 
>  - Merge tag 'jdk-21+23' into JDK-8256302
>    
>    Added tag jdk-21+23 for changeset 6d4782bc
>  - address the easy dholmes and kimbarrett CR comments
>  - 8256302: releasing oopStorage when deflating allows for faster deleting

Couldn't do a normal merge into this PR since it was so old; I was last working
on this PR back in JDK20 and the usual "git merge master" resulted in a failure
because of too many rename guesses.

I ported the previous patches to jdk-21 and then rebased the project to jdk-21+23,
but that required a "force push".

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PR Comment: https://git.openjdk.org/jdk/pull/11296#issuecomment-1557892838