RFR: 8243961: ForceNUMA and only one available NUMA node fails assertion on Windows

[Kim Barrett]

> On May 5, 2020, at 4:53 AM, stefan.johansson at oracle.com wrote:
> 
> 
> 
> On 2020-05-02 11:59, Kim Barrett wrote:
>> New webrev:
>> https://cr.openjdk.java.net/~kbarrett/8243961/open.01/
> Looks good. Just one small thing and I know people have different opinions about this, so ignore this if you like. NUMA isn't supported on AIX, so I think it would make more sense to use FLAG_SET_DEFAULT there.

I think a "default" should not override an explicit command line
option.  I think it would be confusing to have the output from
-XX:+PrintFlagsFinal with an explicit -XX:+UseNUMA indicate in the
output that the default value was used.  By using FLAG_SET_ERGO the
output will have "command line, ergonomic".