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  1. JDK
  2. JDK-8313782

Add user-facing warning if THPs are enabled but cannot be used

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    • b11
    • linux

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        We don't warn the user if +UseTransparentHugePages were specified (and nothing else, but this implies +UseLargePages), but the system does not support THPs.

        We used to have warnings in the code, but I checked and they never really worked (I tried older versions of the JDK). The reason is that THP detection had been broken (fixed with https://bugs.openjdk.org/browse/JDK-8310233). The broken detection always reported success even if THPs are disabled, so the user would never have seen this warning even when we had it.

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                stuefe Thomas Stuefe
                stuefe Thomas Stuefe
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