RFR: 8237542: JMapHeapConfigTest.java doesn't work with negative jlong values

[Chris Plummer]

On Thu, 24 Aug 2023 09:16:08 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Please test with all current GCs? We have seen regressions in this test with Shenandoah previously.

Passed with G1, Z, ZGenerational, Shenandoah, Serial, and Parallel.

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PR Comment: https://git.openjdk.org/jdk/pull/15368#issuecomment-1692237481