[jdk11u-dev] RFR: 8232533: G1 uses only a single thread for pretouching the java heap

[Yi-Fan Tsai]

8232533: G1 uses only a single thread for pretouching the java heap

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Commit messages:
 - Backport 9611320f6921aab26c2b84fdd0a133fd6dd0eb12

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/751/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=751&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8232533
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/751.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/751/head:pull/751

PR: https://git.openjdk.java.net/jdk11u-dev/pull/751