RFR: 8237825: ZGC: Replace -XX:ZPath with -XX:AllocateHeapAt

[erik.osterlund at oracle.com]

Hi Per,

Looks good!

/Erik

On 1/24/20 3:49 PM, Per Liden wrote:
> ZGC has the option -XX:ZPath to allow a user to explicitly specify 
> where the backing file system is located. However, after ZPath was 
> introduced, a new generic option -XX:AllocateHeapAt was introduced. 
> This option is used the other GCs and have the same meaning/purpose 
> and it's arguably better named. There's no good reason why ZGC 
> shouldn't use that too, instead of -XX:ZPath.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8237825
> Webrev: http://cr.openjdk.java.net/~pliden/8237825/webrev.0
>
> /Per