8293861: G1: Disable preventive GCs by default

[caojoshua]

Not a clean backport due to neighboring changes in the same file. Patch is simple and manual fixes are trivial.

As mentioned in the JBS issue, preventive GCs has had issues on JDK 17. TrinoDB is impacted and recommends disabling preventive GCs in trinodb/trino#15380. We have seen internal applications that are affected by this issue as well.

GHA are full green. Locally run tier1 tests are all green.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8293861 needs maintainer approval

Issue

• JDK-8293861: G1: Disable preventive GCs by default (Enhancement - P4 - Requested)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev.git pull/1758/head:pull/1758
$ git checkout pull/1758

Update a local copy of the PR:
$ git checkout pull/1758
$ git pull https://git.openjdk.org/jdk17u-dev.git pull/1758/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1758

View PR using the GUI difftool:
$ git pr show -t 1758

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk17u-dev/pull/1758.diff

Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back caojoshua! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @caojoshua This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (784e7c21)