RFR: JDK-8144464 : WB method to start G1 concurrent mark cycle should be introduced

[Thomas Schatzl]

Hi,

  looks good. Actually it seems that this change applied without any
problems apart from minor line number differences.

On Wed, 2015-12-09 at 00:43 -0800, Shafi Ahmad wrote:
> Hi,
> 
>  
> 
> Please, can I get review for that backport? Thank you!
> 

Thanks,
  Thomas