RFR: 8318053: GenShen: Control thread may ignore requests to start concurrent GC

[Y. Srinivas Ramakrishna]

On Thu, 12 Oct 2023 23:42:43 GMT, William Kemper <wkemper at openjdk.org> wrote:

> If a request to interrupt an old cycle is accepted, but there is an allocation failure before the requested cycle begins, then the control thread may become stuck in a state where it believes it should ignore further concurrent cycle requests.

Thanks for the extra logging!

Changes look good to me.

Can you add into the ticket the command-line that was used for inducing the errant behavior?

Also can you add into this PR how you tested to confirm that it no longer occurs after the fix?

Thanks!

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Marked as reviewed by ysr (Committer).

PR Review: https://git.openjdk.org/shenandoah/pull/339#pullrequestreview-1675423288