RFR: JDK-8304954: SegmentedCodeCache fails when using large pages [v4]

[Thomas Stuefe]

On Mon, 24 Jul 2023 14:15:38 GMT, Damon Fenacci <dfenacci at openjdk.org> wrote:

>> I'd limit this to linux only. No need to run on OSes that don't support large pages.
>> 
>> (If we want to be really correct, windows too, but I'm not so sure how stable and well-tested large page support there is)
>
>> Why not Z?
> 
> It seems that ZGC requires large pages of specific given size (2MB. The test fails with *Incompatible -XX:LargePageSizeInBytes, only 2M large pages are supported by ZGC* otherwise).

Oh right. But this issue is not strictly speaking limited to 1G. It could happen on 2M, too, if you were to allocate a code cache size < 8*2, e.g. 15M. If one gets the JVM to run with that little code cache.

Up to you, though. I'm fine with leaving Zgc out too.

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PR Review Comment: https://git.openjdk.org/jdk/pull/14903#discussion_r1272335437