RFR: 8310015: ZGC: Unbounded asynchronous unmapping can lead to running out of address space

Mon Jun 19 07:48:20 UTC 2023

Hi all,

This pull request contains a backport of commit [4229baf9](https://github.com/openjdk/jdk/commit/4229baf9b669ad0af94720cab21a4b80a6ae1c7e) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Erik Österlund on 19 Jun 2023 and was reviewed by Stefan Karlsson and Axel Boldt-Christmas.

Thanks!

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Commit messages:
 - Backport 4229baf9b669ad0af94720cab21a4b80a6ae1c7e

Changes: https://git.openjdk.org/jdk21/pull/28/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21&pr=28&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310015
  Stats: 105 lines in 6 files changed: 93 ins; 6 del; 6 mod
  Patch: https://git.openjdk.org/jdk21/pull/28.diff
  Fetch: git fetch https://git.openjdk.org/jdk21.git pull/28/head:pull/28

PR: https://git.openjdk.org/jdk21/pull/28