RFR: Empty task queues when cancelled partial GC

[Zhengyu Gu]

Or can empty the queue at the beginning of each cycle.

-Zhengyu

On 03/20/2017 12:27 PM, Roman Kennke wrote:
> When partial GC gets cancelled, we need to empty the task queues.
>
> I also added a small check to verify this, even for release build
> (shuold we make this debug-only?)
>
> http://cr.openjdk.java.net/~rkennke/fixemptyq/webrev.00/
> <http://cr.openjdk.java.net/%7Erkennke/fixemptyq/webrev.00/>
>
> Ok?
>
>
>