[jdk23u] RFR: 8333522: JFR SwapSpace event might read wrong free swap space size

[Matthias Baesken]

8333522: JFR SwapSpace event might read wrong free swap space size

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Commit messages:
 - Backport de55db2352f84c101f8197ee7aca80d72807fbc5

Changes: https://git.openjdk.org/jdk23u/pull/88/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk23u&pr=88&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333522
  Stats: 4 lines in 1 file changed: 3 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk23u/pull/88.diff
  Fetch: git fetch https://git.openjdk.org/jdk23u.git pull/88/head:pull/88

PR: https://git.openjdk.org/jdk23u/pull/88