Withdrawn: 8338534: GenShen: Handle alloc failure differently when immediate garbage is pending

[duke]

On Wed, 21 Aug 2024 14:48:55 GMT, Kelvin Nilsen <kdnilsen at openjdk.org> wrote:

> Several changes are implemented here:
> 
> 1. Re-order the phases that execute immediately after final-mark so that we do concurrent-cleanup quicker (but still after concurrent weak references)
> 2. After immediate garbage has been reclaimed by concurrent cleanup, notify waiting allocators
> 3. If an allocation failure occurs while immediate garbage recycling is pending, stall the allocation but do not cancel the concurrent gc.

This pull request has been closed without being integrated.

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PR: https://git.openjdk.org/shenandoah/pull/479