RFR: 8343782: G1: Use one G1CardSet instance for multiple old gen regions [v12]

[Ivan Walulya]

On Mon, 9 Feb 2026 17:13:38 GMT, luben karavelov <duke at openjdk.org> wrote:

>> Ivan Walulya has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   space
>
> Looks that this causes intermittent data corruption when using zstd-jni. Reported in https://github.com/luben/zstd-jni/issues/377

@luben, could you please file an issue at https://bugreport.java.com/  or send an email to hotspot-gc-dev at openjdk.org  so we can follow up on this outside of the current PR? When filing, please include any relevant hs_err logs or logs with verification enabled to help with diagnosing the issue. Additionally, could you test with JDK 26 to confirm whether the issue persists in later versions?

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PR Comment: https://git.openjdk.org/jdk/pull/22015#issuecomment-3876325802