RFR: 8333129: Move ShrinkHeapInSteps flag to Serial GC

[David Holmes]

On Wed, 29 May 2024 12:36:40 GMT, Zhengyu Gu <zgu at openjdk.org> wrote:

> A trivial change that moves Serial GC specific flag `ShrinkHeapInSteps` to `serial_globals.hpp`

Okay. Thanks

Apologies, I was mistakenly thinking that moving the flag would cause a runtime error for code not using Serial GC, but it will only cause an error if a VM were built without Serial GC support, which I don't think is possible.

I will file a RFE to get the GC Tuning guide updates (if @kimbarrett doesn't beat me to it :) ).

I also note that component-specific global flags don't advertise the fact they are global-specific.

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Marked as reviewed by dholmes (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/19452#pullrequestreview-2089935612
PR Comment: https://git.openjdk.org/jdk/pull/19452#issuecomment-2141270467