On Tue, 19 Nov 2024 23:07:21 GMT, William Kemper <wkem...@openjdk.org> wrote:
>> src/hotspot/share/gc/shenandoah/shenandoahMarkingContext.cpp line 44:
>>
>>> 42: for (size_t idx = 0; idx < num_regions; idx++) {
>>> 43: ShenandoahHeapRegion* r = heap->get_region(idx);
>>> 44: if (r->is_affiliated() && heap->is_bitmap_slice_committed(r) &&
>>> !is_bitmap_clear_range(r->bottom(), r->end())) {
>>
>> I don't understand this for single gen mode. In that mode `is_affiliated()
>> == false` always, right? So this check never passes, and `is_bitmap_clear`
>> always returns `true`?
>
> No, in single gen mode regions that are not `FREE` are affiliated with
> `YOUNG`.
That's weird. We have `Young`, `Old` and `Global` generations. Why affiliation
is not `Free`, `Young`, `Old`, and `Global` then?
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PR Review Comment: https://git.openjdk.org/jdk/pull/21273#discussion_r1850665665
