RFR: 8377035: [s390x] Disable JSR166 test cases which uses virtual threads [v2]

[Alan Bateman]

On Fri, 6 Feb 2026 06:05:34 GMT, Harshit470250 <duke at openjdk.org> wrote:

> `OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x000003efa8500000, 16384, 0) failed; error='Not enough space' (errno=12)` I will add the failure logs.

ReentrantReadWriteLock20Test creates 64k virtual threads. If the s390 port doesn't have the VM continuations implementation then the fallback/alternative implementation will create a native thread to execute each virtual thread. So I assume this commit is thread stack or some other resources when create a native thread.

Should be easy to duplicate on other platforms with -XX:+UnlockExperimentalVMOptions -XX:-VMContinuations.

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PR Comment: https://git.openjdk.org/jdk/pull/29555#issuecomment-3858476125