In G1, "full-young" GCs are GCs that collect only young regions, "partially-young" GCs are GCs that collect both young (eden / survivors) and old regions. We are not very happy with this terminology, especially the latter. So, we would like to rename them to "young" and "mixed". We should at least change all the output to conform to this terminology, i.e., it's not necessary to also change all variable names, comments, etc. - we can do that over time.
It turns out the fields / methods / comments that have the full/fully young / partial terminology are not that many. So, I'm going to go ahead and rename them. Below are the ones that are used most and how they will be renamed:
_full_young_gcs -> _gcs_are_young
full_young_gcs() -> gcs_are_young()
set_full_young_gcs() -> set_gcs_are_young()
_should_revert_to_full_young_gcs -> _should_revert_to_young_gcs
_last_full_young_gc -> _last_young_gc
_last_young_gc_full -> _last_gc_was_young