RFR: Expand old on demand [v42]

[Kelvin Nilsen]

On Wed, 10 May 2023 23:58:51 GMT, Kelvin Nilsen <kdnilsen at openjdk.org> wrote:

>> src/hotspot/share/gc/shenandoah/heuristics/shenandoahHeuristics.hpp line 176:
>> 
>>> 174:   virtual void initialize();
>>> 175: 
>>> 176:   virtual size_t evac_slack(size_t region_to_be_recycled);
>> 
>> should be regions_to_be_recycled
>
> also explain what the argument means.

I'm renaming evac_slack() to bytes_of_allocation_runway_before_gc_trigger().  I'm renaming the argument young_regions_to_be_reclaimed.  I'm adding comments to improve the description of this function and its argument.

-------------

PR Review Comment: https://git.openjdk.org/shenandoah/pull/248#discussion_r1205926157