After memory hot unplug via REST API the Defined Memory field in RHV-M displays different values from the free command in the RHEL guest

Issue

• After repeated hot plug and hot unplug attempts via the REST API, the total memory value displayed by the free command on the guest goes out of sync with the Defined Memory value displayed in the RHV-M UI.

  In the RHV-M UI, Compute -> Virtual Machines -> select VM > General tab displays:

  Defined Memory: 4096 MB
  

  RHEL guest displays:

  # free -m
                total        used        free      shared  buff/cache   available
  Mem:          28309         886       26929          10         492       26399
  

  Both memory values should be the same.