RFR: 8242459: ForceNUMA and only one available NUMA node hits a guarantee

[Kim Barrett]

> On Apr 27, 2020, at 6:11 AM, Thomas Schatzl <thomas.schatzl at oracle.com> wrote:
> 
> Hi,
> 
> On 27.04.20 05:21, Kim Barrett wrote:
>> Please review this small change to avoid failing assertions when
>> -XX:+ForceNUMA is used to override the decision to disable UseNUMA
>> when there is only one NUMA node being used.  There were a couple of
>> places that assumed that if UseNUMA is true then there must be more
>> than one NUMA node, but that isn't so.
>> CR:
>> https://bugs.openjdk.java.net/browse/JDK-8242459
>> Webrev:
>> https://cr.openjdk.java.net/~kbarrett/8242459/open.00/
>> Testing:
>> mach5 tier1
>> Locally (linux-x64) manually ran the provided test case, verifying
>> failure before changes and working after.
> 
>  looks good.
> 
> Thomas

Thanks.