RFR: 8361204: Parallel: Skip visiting per-thread nmethods during young GC

Wed Jul 2 10:07:18 UTC 2025

Small patch of removing per-thread nmethod visiting during young-gc, because relevant nmethods for young-gc are already tracked by `ScavengableNMethods`.

Test: tier1-8

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Commit messages:
 - pgc-skip-nmethod

Changes: https://git.openjdk.org/jdk/pull/26089/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26089&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361204
  Stats: 3 lines in 1 file changed: 1 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/26089.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26089/head:pull/26089

PR: https://git.openjdk.org/jdk/pull/26089