RFR: Load balance remembered set scanning [v4]

[Y. Srinivas Ramakrishna]

On Mon, 8 Aug 2022 16:09:40 GMT, Y. Srinivas Ramakrishna <ysr at openjdk.org> wrote:

>> Thanks very much for figuring out this problem.  I'd like to address this change in a different pull request to keep the history cleaner.
>
> 👍

I left a SPECjbb run overnight with the changes, but alas it still does crash (slowdebug mode) during a deoptimization, presumably because of a bad oop on the stack. I'll file a ticket to track the issue, but it does seem like there's some other issue besides the one pointed out above.

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PR: https://git.openjdk.org/shenandoah/pull/153