[jdk17u] RFR: 8275226: Shenandoah: Relax memory constraint for worker claiming tasks/ranges

[Aleksey Shipilev]

On Fri, 12 Nov 2021 07:26:34 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Clean backport to improve Shenandoah performance.
> 
> Additional testing: 
>  - [x] Linux x86_64 fastdebug `hotspot_gc_shenandoah`

Got the push approval.

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PR: https://git.openjdk.java.net/jdk17u/pull/253