The libxl driver does not set the new memory value in the active domain def after a successful balloon. This results in the old memory value in <currentMemory>. E.g. virsh dumpxml test | grep currentMemory <currentMemory unit='KiB'>20971520</currentMemory> virsh setmem test 16777216 --live virsh dumpxml test | grep currentMemory <currentMemory unit='KiB'>20971520</currentMemory> Set the new memory value in active domain def after a successful call to libxl_set_memory_target(). Signed-off-by: Jim Fehlig <jfehlig(a)suse.com&gt; --- src/libxl/libxl_driver.c | 1 + 1 file changed, 1 insertion(+) diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c index e30c9891d2..f11597b0d7 100644 --- a/src/libxl/libxl_driver.c +++ b/src/libxl/libxl_driver.c @@ -1676,6 +1676,7 @@ libxlDomainSetMemoryFlags(virDomainPtr dom, unsigned long newmem, " with libxenlight"), vm->def->id); goto endjob; } + vm->def->mem.cur_balloon = newmem; } if (flags & VIR_DOMAIN_MEM_CONFIG) { -- 2.19.2