RFR: 8242032: G1 region remembered sets may contain non-coarse level PRTs for already coarsened regions [v2]

[Joakim Nordström]

On Fri, 19 Feb 2021 10:38:35 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Joakim Nordström has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - Clarified comment on re-checking coarsening
>>  - Minor typo
>
> src/hotspot/share/gc/g1/heapRegionRemSet.cpp line 149:
> 
>> 147:     MutexLocker x(_m, Mutex::_no_safepoint_check_flag);
>> 148: 
>> 149:     // Make sure region hasn't been coarsened by other thread.
> 
> Maybe mentioning this is an intentional re-check under lock, sth like, "Rechecking if the region is coarsened while holding the lock."

Yes, thank you!

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PR: https://git.openjdk.java.net/jdk/pull/2545