RFR: 8256302: releasing oopStorage when deflating allows for faster deleting [v2]

[Daniel D. Daugherty]

> 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 incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - address the easy dholmes and kimbarrett CR comments
 - Merge branch 'JDK-8291418' into JDK-8256302
 - Merge branch 'JDK-8291418' into JDK-8256302
 - 8256302: releasing oopStorage when deflating allows for faster deleting

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/11296/files
  - new: https://git.openjdk.org/jdk/pull/11296/files/7ff580ab..71df9277

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11296&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11296&range=00-01

  Stats: 60150 lines in 1109 files changed: 26665 ins; 20092 del; 13393 mod
  Patch: https://git.openjdk.org/jdk/pull/11296.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11296/head:pull/11296

PR: https://git.openjdk.org/jdk/pull/11296