[jdk11u-dev] RFR: 8229147: Linux os::create_thread() overcounts guardpage size with newer glibc (>=2.27) [v3]

[Lutz Schmidt]

> This backport is for parity with 11.0.21-oracle. 
> Fix didn't apply at all, os/linux/os_linux.cpp was too different in particular. 
> I managed to create a working version by massaging and applying the changes manually. 
> 
> There is some risk involved. It is not caused by the intentional change of behavior but by potential collateral damage. 
> 
> Tests (SAP nightly test suite) do not indicate any issues.
> Reviews pending.

Lutz Schmidt has updated the pull request incrementally with one additional commit since the last revision:

  JDK-8229147 follow request from GoeLin

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

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/2035/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/2035/files/33bb61f7..d9e1613c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2035&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2035&range=01-02

  Stats: 7 lines in 1 file changed: 2 ins; 4 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2035.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2035/head:pull/2035

PR: https://git.openjdk.org/jdk11u-dev/pull/2035