RFR: 8375359: Improve GC serviceability init staging [v2]

[Aleksey Shipilev]

On Wed, 18 Feb 2026 12:21:48 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> I wonder if `Universe::heap()->initialize_serviceability();` can be moved inside `MemoryService::set_universe_heap(Universe::heap());` -- in the context of `universe_post_init`, it's not obvious whether the relative ordering is critical (but it is).

That's a good suggestion. It looks even cleaner to move and sequence both `initialize_serviceability()` and `add_metaspace_memory_pools()`. Please take a look at new commit. It passes stress tests as well.

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PR Comment: https://git.openjdk.org/jdk/pull/29254#issuecomment-3921460993