RFR [8], 2018-06-13, Bulk backports to sh/jdk8

[Roman Kennke]

Am 13.06.2018 um 11:57 schrieb Aleksey Shipilev:
> http://cr.openjdk.java.net/~shade/shenandoah/backports/jdk8u-20180613/webrev.01/
> 
> This backports recent bugfixes and performance improvements to sh/jdk8:
> 
>  [backport] Disable UseFastJNIAccessors for Shenandoah
>  [backport] Should cleanup previous/bad versions of redefined classes during full gc
>  [backport] Including metaspace info when reporting heap info
>  [backport] Adaptive CSet selection selects excessively when memory is tight
>  [backport] Parallel +AlwaysPreTouch should run with max workers
>  [backport] Fix TestCommonGCLoads test
>  [backport] Added logging for the number of workers used for GC cycles
>  [backport] C1 shenandoah_wb expects obj in a register
>  [backport] Some trivial-ish cleanups
>  [backport] Replace ShBarrierSet* casts with accessor
>  [backport] Perform gc-state checks with LoadB to fit C2 matchers
> 
> Testing: hotspot_tier3_gc_shenandoah {fastdebug|release}
> 
> Thanks,
> -Aleksey
> 

Looks good!
Thanks,
Roman