RFR: 8315680: java/lang/ref/ReachabilityFenceTest.java should run with -Xbatch

[Tom Rodriguez]

On Tue, 3 Oct 2023 07:47:30 GMT, Gergö Barany <gbarany at openjdk.org> wrote:

> This test requires certain methods to be compiled, but without `-Xbatch` the compiler races against the test code, which can lead to intermittent failures.

Marked as reviewed by never (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/16023#pullrequestreview-1715579342