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

[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