[jdk11u-dev] RFR: 8265231: (fc) ReadDirect and WriteDirect tests fail after fix for JDK-8264821

[Zhengyu Gu]

I would like to backport this patch to 11u for parity with Oracle 11.0.13.

11u patch has been reviewed: https://mail.openjdk.java.net/pipermail/jdk-updates-dev/2021-May/006348.html and the test passed.

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Commit messages:
 - Backport d1b28e7ad07bda33cd4e35b58b7f6dccfac3435c

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/13/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=13&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265231
  Stats: 6 lines in 1 file changed: 0 ins; 1 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/13.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/13/head:pull/13

PR: https://git.openjdk.java.net/jdk11u-dev/pull/13