[jdk25u] RFR: 8367869: Test java/io/FileDescriptor/Sync.java timed out [v2]

[SendaoYan]

> Hi all,
> 
> This pull request contains a backport of commit [61c5245b](https://github.com/openjdk/jdk/commit/61c5245bf7d6626b0c816612adcb0d94d6863644) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by SendaoYan on 23 Sep 2025 and was reviewed by Jaikiran Pai, Aleksey Shipilev and Roger Riggs.
> 
> Thanks!

SendaoYan has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'openjdk:master' into backport-sendaoYan-61c5245b-master
 - Backport 61c5245bf7d6626b0c816612adcb0d94d6863644

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

Changes:
  - all: https://git.openjdk.org/jdk25u/pull/230/files
  - new: https://git.openjdk.org/jdk25u/pull/230/files/70f34cce..aedb4adf

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk25u&pr=230&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk25u&pr=230&range=00-01

  Stats: 10263 lines in 308 files changed: 5335 ins; 3814 del; 1114 mod
  Patch: https://git.openjdk.org/jdk25u/pull/230.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/230/head:pull/230

PR: https://git.openjdk.org/jdk25u/pull/230