[8u-dev] Request for Approval for CR 8198794: Hotspot crash on Cassandra 3.11.1 startup with libnuma 2.0.3

[Gustavo Romero]

Hi,

I would like to request the approval for pushing the following change
that applies cleanly to jdk8u-dev except for an offset correction and
a file path adjust (due to repo consolidation) and fixes a JVM crash
when -XX:+UseNUMA is used on a system with libnuma 2.0.3 or older:

Bug          : https://bugs.openjdk.java.net/browse/JDK-8198794
Change       : http://hg.openjdk.java.net/jdk/hs/rev/7fb0ad2d8749
Review Thread: http://mail.openjdk.java.net/pipermail/hotspot-dev/2018-March/030657.html

This change is in shared code but is of very low risk since it can be
regarded as addressing a sort of corner case on libnuma API v2
implementation where numa_nodes_ptr variable is not defined before
the libnuma 2.0.5 (2010). Thus nothing changes for any system that
uses a recent libnuma (from Oct 2010 to the present), hence for the
great majority of Linux distros releases in use today.

Thank you.


Best regards,
Gustavo