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From "Joshua McKenzie (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-11576) Add support for JNA mlockall(2) on POWER
Date Wed, 15 Jun 2016 21:13:09 GMT


Joshua McKenzie commented on CASSANDRA-11576:

Oh, I missed the fact that you were going the octal route. How about we keep them as hex so
we have consistency w/the original declaration they're referring to?

> Add support for JNA mlockall(2) on POWER
> ----------------------------------------
>                 Key: CASSANDRA-11576
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>         Environment: POWER architecture
>            Reporter: Rei Odaira
>            Assignee: Rei Odaira
>            Priority: Minor
>             Fix For: 2.1.x, 2.2.x, 3.0.x, 3.x
>         Attachments: 11576-2.1.txt
> org.apache.cassandra.utils.CLibrary contains hard-coded C-macro values to be passed to
system calls through JNA. These values are system-dependent, and as far as I investigated,
Linux and AIX on the IBM POWER architecture define {{MCL_CURRENT}} and {{MCL_FUTURE}} (for
mlockall(2)) as different values than the current hard-coded values.  As a result, mlockall(2)
fails on these platforms.
> {code}
> WARN  18:51:51 Unknown mlockall error 22
> {code}
> I am going to provide a patch to support JNA mlockall(2) on POWER.

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