RFR: 8368954: G1: Document why G1 uses TLS storage for the current card table reference

[Albert Mingkun Yang]

On Tue, 30 Sep 2025 15:55:23 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> But G1 can embed the address of the value in the code stream, similar to Serial/Parallel (which embed the actual base address). The emphasis should be on the embedding, not what is embedded.
>
> maybe just remove the "an address" to avoid the confusion?

It's my misunderstanding then. How about just dropping "similar to Serial/Parallel"? I don't see any benefit of referencing them here.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27573#discussion_r2392112959