RFR: 8280029: G1: "Overflow during reference processing, can not continue" on x86_32

[Albert Mingkun Yang]

On Mon, 17 Jan 2022 12:24:05 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> This should fix the intermittent G1 x86_32 failure in GHA. See more investigation in the bug. I think at this point we are better off bumping the default mark stack size for 32-bit builds. Also fix the error message to be less misleading.
> 
> Additional testing:
>   - [x] Affected test on Linux fastdebug x86_32, 100 repeats; used to fail at about 10th iteration, does not fail anymore;
>   - [x] Linux x86_32 fastdebug `tier1`
>   - [x] Linux x86_32 fastdebug `tier2`
>   - [ ] Linux x86_32 fastdebug `tier3`

The fix looks good. However, bailing out with markstack overflow while the used mark stack size is still way below `MarkStackSizeMax` is still quite counterintuitive.

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Marked as reviewed by ayang (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/7109