RFR: 8170067: -XX:ExplicitGCInvokesConcurrentAndUnloadsClasses is not implemented for G1

Erik Helin erik.helin at oracle.com
Mon Nov 28 21:20:39 UTC 2016

Hi everyone,

thanks for all your feedback!

Taking all the suggestions into account and discussing this patch with 
others, I now withdraw this review request. I now think it makes more 
sense to deprecate this flag, see 
for details.


On 11/23/2016 02:05 PM, Erik Helin wrote:
> Hi all,
> I just added support for
> -XX:ExplicitGCInvokesConcurrentAndUnloadsClasses in G1. Since G1 already
> unloads classes after a concurrent mark by default, I just made
> -XX:+ExplicitGCInvokesConcurrentAndUnloadsClasses enable
> -XX:+ExplicitGCInvokesConcurrent. I also added a constraint function to
> check for some bad flag combinations and a corresponding test.
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8170067
> Webrev:
> http://cr.openjdk.java.net/~ehelin/8170067/00/
> Testing:
> - JPRT
> - New jtreg test
> Thanks,
> Erik

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