RFR: 8221219: ZGC: Remove ZStallOnOutOfMemory option

[Per Liden]

Thanks Erik!

/Per

On 3/22/19 12:17 PM, Erik Österlund wrote:
> Hi Per,
> 
> Looks good.
> 
> Thanks,
> /Erik
> 
> On 2019-03-21 09:16, Per Liden wrote:
>> I should perhaps clarify that this option is enabled by default, and 
>> it's disabling it that is not so useful.
>>
>> /Per
>>
>> On 3/21/19 9:12 AM, Per Liden wrote:
>>> The ZStallOnOutOfMemory option was added in ZGC's early days, and was 
>>> at that time useful when testing and debugging. These days it's not 
>>> so useful, and I can't really see anyone wanting to use it when 
>>> running a real application as is can/will cause pre-mature OOMEs to 
>>> be thrown. I suggest we remove it.
>>>
>>> Bug: https://bugs.openjdk.java.net/browse/JDK-8221219
>>> Webrev: http://cr.openjdk.java.net/~pliden/8221219/webrev.0
>>>
>>> (Change builds on JDK-8221212, which is out for review)
>>>
>>> /Per
>