RFR: 8268647: Generation::expand_and_allocate has unused "parallel" argument

[Kim Barrett]

On Mon, 14 Jun 2021 15:04:37 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Please review this simplification of the Generation class and the classes
>> derived from it.  There are no callers of expand_and_allocate that pass the
>> third argument explicitly, so its value is always the default (false) value.
>> 
>> This change removes the argument and updates the two implementations of this
>> virtual function accordingly.
>> 
>> [The "parallel" argument is probably a leftover from CMS support.]
>> 
>> Testing:
>> mach5 tier1.
>
> Marked as reviewed by ayang (Committer).

Thanks @albertnetymk and @tschatzl for reviews.

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PR: https://git.openjdk.java.net/jdk/pull/4485