RFR: 8265842: G1: Introduce API to run multiple separate tasks in a single gangtask [v8]

[Thomas Schatzl]

On Thu, 29 Apr 2021 09:42:33 GMT, Ivan Walulya <iwalulya at openjdk.org> wrote:

>> Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   sjohanss review
>
> lgtm!

Thanks @walulyai @kstefanj @albertnetymk @lkorinth for your reviews!

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PR: https://git.openjdk.java.net/jdk/pull/3653