RFR: 8229147: Linux os::create_thread() overcounts guardpage size with newer glibc (>=2.27)

[David Holmes]

On Mon, 24 Apr 2023 08:08:44 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> To a degree this is pre-existing behaviour - nothing to do with `AdjustStackSizeForTLS` is glibc-only even though it is. So I would have to change that as well, which broadens the scope and is not something I can, or want to, test!
>
> Okay, up to you then. We can fix this in a cleanup for muslc later.

With the initialization logic reworked I've now made that initialization code GLIBC only.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/13571#discussion_r1177225353