JDK-8272138 introduced an unbound membar release() between the object copy and the forwarding table insertion.

Thread A (Relocation):
copy();
release();
cas_forwarding_table();
cas_self_heal();

The membar guarantees that the contents of the forwarded object are ready after a forwarding entry is loaded. Since load_object_content(ref) depends on the result of load_forwarding_table(), load_acquire can be safely changed to a simple load.

Thread B (Remapping/Relocation):
ref = load_forwarding_table(); // acquire (current version) -> relaxed (our proposal)
load_object_content(ref);

Our experiment on heapothesys demonstrates >5% time reduction spent on concurrent mark/relocation on AArch64.