RFR: 8317371: GenShen: Needs improved support for humongous allocation [v3]

[William Kemper]

On Fri, 13 Oct 2023 00:38:09 GMT, Kelvin Nilsen <kdnilsen at openjdk.org> wrote:

>> I'm not sure which member fields you are recommending here.
>> 
>> ShenandoahFreeSet remembers first and last indexes of the OldCollector free set, but the range we are interested in here includes all retired old-gen regions in addition to the free regions.
>> 
>> If I'm misunderstanding your suggestion, please clarify.
>
> Not sure which member fields.  Please clarify.

It looks like `fragmentation_trigger_reason` just copies the values of the member fields into its arguments.

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PR Review Comment: https://git.openjdk.org/shenandoah/pull/336#discussion_r1358640725