RFR: 8264818: G1: Improve liveness check for empty pinned regions after full gc marking [v2]
Thomas Schatzl
tschatzl at openjdk.java.net
Thu Apr 15 08:38:47 UTC 2021
> Hi all,
>
> can I have reviews for this small change improving the check for empty Open Archive regions using information that has recently been added to the full gc in [JDK-8263495](https://bugs.openjdk.java.net/browse/JDK-8263495) instead of scanning the region?
>
> Testing: tier1-3, manual check that the freeing still works using some hack to create a dummy Open Archive region which contents are completely unreferenced and then running a "Hello World" app doing a system.gc. The patch for the VM to create that archive is [here](https://github.com/openjdk/jdk/commit/47d740d244b09b104df635c07ee49f89f480ebc6).
Thomas Schatzl has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains two commits:
- Merge branch 'master' into 8264818-improve-liveness-check
- Initial commit
-------------
Changes: https://git.openjdk.java.net/jdk/pull/3485/files
Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3485&range=01
Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
Patch: https://git.openjdk.java.net/jdk/pull/3485.diff
Fetch: git fetch https://git.openjdk.java.net/jdk pull/3485/head:pull/3485
PR: https://git.openjdk.java.net/jdk/pull/3485
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