RFR [8u]: Bulk backport to sh/jdk8u

[Roman Kennke]

Am 21.11.2017 um 11:53 schrieb Aleksey Shipilev:
> On 11/21/2017 11:53 AM, Roman Kennke wrote:
>>
>>> http://cr.openjdk.java.net/~shade/shenandoah/backports/jdk8u-20171120/webrev.01/
>>>
>>> Important performance changes:
>>>
>>> rev 10197 : [backport] Passive should opt-in the barriers, not opt-out
>>> rev 10198 : [backport] Enable biased locking for Shenandoah by default
>>>
>>> Barrier change was amended with two guards to make tests pass.
>>>
>>> Testing: hotspot_gc_shenandoah {fastdebug|release}
>>>
>>> Thanks,
>>> -Aleksey
>>>
>>>
>> So we don't have any ways to exlude acmp, storeval, etc barriers in 8u?
> 
> That's right, we don't. I am working on that.
> 
> -Aleksey
> 

Ok. Push the backport as is.

Roman