RFR: Unconditional conditional card marking

Fri Apr 21 18:14:03 UTC 2023

On Fri, 21 Apr 2023 15:32:43 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> For the overwhelming majority of current systems, it makes little sense to run without conditional card marks enabled. G1, for example, makes its card marks unconditional. In other words, G1 does not respond to `UseCondCardMark`. This also simplifies code, eliminates one additional testing configuration, and provides safety for the cases where `UseCondCardMark` is accidentally disabled.
> 
> Additional testing: 
>  - [x] macos-aarch64-server-fastdebug, `hotspot_gc_shenandoah`

LGTM

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

Marked as reviewed by wkemper (Committer).

PR Review: https://git.openjdk.org/shenandoah/pull/264#pullrequestreview-1396216096