problem with hotplug and 64GB ram

[fabian]

the more ram you assign, the bigger the DIMMs that get plugged get -> 64G already means 2G dimms, and the alignment makes it so that 64G is not a valid choice, but 65G is.

 

[jlauro]

I am having the same issue and can't set more than 44GB of RAM.
Trying 65GB I get the error:
kvm: -device pc-dimm,id=dimm59,memdev=mem-dimm59,node=3: a used vhost backend has not enough free memory slots left
TASK ERROR: start failed: QEMU exited with code 1

(Running 8.3.0)