This is fixed by commit: c275a57f5ec3056f732843b11659d892235faff7 (xen/balloon: Set balloon's initial state to number of existing RAM pages)
which requires part of commit: 7ee3d4e8cd560500192d80ca84d7f15d6dee0807 (mm: introduce helper function mem_init_print_info() to simplify mem_init())
This is fixed by commit: f732843b11659d8 92235faff7 (xen/balloon: Set balloon's initial state to number of existing RAM pages)
c275a57f5ec3056
which requires part of commit: 0192d80ca84d7f1 5d6dee0807 (mm: introduce helper function mem_init_ print_info( ) to simplify mem_init())
7ee3d4e8cd56050