RFR: 8286943: G1: With virtualized remembered sets, maximum number of cards configured is wrong

[Thomas Schatzl]

Hi all,

  can I get reviews for this change that fixes passing a wrong parameter value to card set configuration that

* prevents upgrading a Howl container to Full with virtualized remembered sets (Heap regions >= 64M) as the (default) threshold for coarsening from Howl to Full is max_cards_in_cardset * 0.9, which is always higher than the value tested against (65k, max card set container element number).
* and also unnecessarily increases the bits used for inline ptrs

I added some basic parameter verification to the main constructor which would have caught this issue.

Testing: gha, tier1-3

Thanks,
  Thomas

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Commit messages:
 - More checks
 - Initial changes, add more consistency checks

Changes: https://git.openjdk.java.net/jdk/pull/8773/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8773&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8286943
  Stats: 35 lines in 4 files changed: 28 ins; 0 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8773.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8773/head:pull/8773

PR: https://git.openjdk.java.net/jdk/pull/8773