[jdk21u] RFR: 8312585: Rename DisableTHPStackMitigation flag to THPStackMitigation

Tue Aug 29 10:28:29 UTC 2023

Clean backport. 8312182 introduced a mitigation for THP-related RSS bloat; it came with a switch to switch it off. We then decided to rename the switch. Since the switch should be the same across all releases, this needs to be backported too.

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Commit messages:
 - Merge branch 'openjdk:master' into tstuefe-backport-226cdc69
 - Backport 226cdc696d933fbc174d07b0d9817246dbc0e06c
 - Backport 733250288325bc663afc0376342d4c5a7a471cbd

Changes: https://git.openjdk.org/jdk21u/pull/105/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=105&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8312585
  Stats: 12 lines in 3 files changed: 2 ins; 2 del; 8 mod
  Patch: https://git.openjdk.org/jdk21u/pull/105.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/105/head:pull/105

PR: https://git.openjdk.org/jdk21u/pull/105