[CASSANDRA-11576] Add support for JNA mlockall(2) on POWER

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 2.1.15, 2.2.7, 3.0.8, 3.8
• Component/s: Legacy/Core

Environment

POWER architecture

• Assignee: Rei Odaira
• Reporter: Rei Odaira

Authors

Rei Odaira

Reviewers

Joshua McKenzie

• Created: 14/Apr/16 21:11
• Updated: 16/Apr/19 09:30
• Resolved: 17/Jun/16 16:42

Description

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.

WARN  18:51:51 Unknown mlockall error 22

I am going to provide a patch to support JNA mlockall(2) on POWER.