RFR: JDK-8311026: Some G1 specific tests do not set -XX:+UseG1GC

[Thomas Schatzl]

On Fri, 30 Jun 2023 08:11:47 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> Most G1 tests set -XX:+UseG1GC, but a few (e.g. gc/g1/TestVerificationInConcurrentCycle.java) miss that.
> This is usually just fine and no problem because G1 is the default anyway.
> However in some cases, where a custom JVM changes the default GC, those tests start to fail which is not really necessary.

Marked as reviewed by tschatzl (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/14722#pullrequestreview-1507020443