RFR: 8301465: Remove unnecessary nmethod arming in Full GC of Serial/Parallel

[Thomas Schatzl]

On Tue, 31 Jan 2023 09:18:08 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple removing unnecessary code and adding API documentation.
> 
> Test: hotspot_gc

Changes requested by tschatzl (Reviewer).

src/hotspot/share/code/codeCache.cpp line 880:

> 878: //    nmethods are visited.
> 879: // 2. Used at the end of (stw/concurrent) marking so that nmethod::_gc_epoch is
> 880: //    up-to-date, which provides more accurate estimate of nmethod::is_cold.

I would prefer to have general documentation and usage information about a method in the .hpp file.

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PR: https://git.openjdk.org/jdk/pull/12311