RFR: 8232722: G1 archive region deallocation may shrink the heap below -Xms

[Thomas Schatzl]

On Thu, 25 May 2023 14:31:24 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> src/hotspot/share/gc/g1/heapRegionManager.cpp line 568:
>> 
>>> 566:     }
>>> 567:     HeapRegion* curr_region  = _regions.get_by_index(curr_index);
>>> 568:     if (!curr_region->is_free()) {
>> 
>> What happens with regions committed before this false return?
>
> They will be abandoned and in a weird state... I'll file a bug (this is pre-existing). It never happened because the only case where this is called is CDS loading which happens very early during execution.

I.e. the next region verification will complain.

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

PR Review Comment: https://git.openjdk.org/jdk/pull/14145#discussion_r1205610246