the same here: host debian squeeze: qemu-kvm-0.12.5 guest: windows 2008 server balloon driver: 6.1.7600.16385 10.8.2010
~# virsh -c qemu:///system dominfo 9 | grep Used Used memory: 2064384 kB ~# virsh -c qemu:///system setmem 9 512000 ~# virsh -c qemu:///system dominfo 9 | grep Used Used memory: 2062336 kB the same host, but winXP guest with the same balloon driver is working, looks like balloon driver issue... -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/680758 Title: balloon only resizes by 2M Status in QEMU: New Bug description: when in monitor and running balloon 512 from a 1024M VM, the vm dropped the size to 1020 (this value changes), then every subsequent request to balloon 512 will drop it by another 2M. The system was running at above 60% RAM free when these requests were made. also requesting to up the ram results in no change above 1024 (I'm guessing this is intentional, but was unable to find any documentation) Versions: qemu-kvm 0.13.0 qemu-kvm.git b377474e589e5a1fe2abc7b13fafa8bad802637a Qemu Command Line: ./x86_64-softmmu/qemu-system-x86_64 -drive file=/var/machines/seven.base,if=virtio -net nic,model=virtio,macaddr=02:00:00:00:00:01 -net tap,script=/etc/qemu/qemu-ifup,downscript=/etc/qemu/qemu-ifdown -vga std -usb -usbdevice tablet -rtc base=localtime,clock=host -watchdog i6300esb -balloon virtio -m 1024 -no-quit -smp 2 -monitor stdio Monitor Session: QEMU 0.13.50 monitor - type 'help' for more information (qemu) info balloon balloon: actual=1024 (qemu) balloon 1536 (qemu) info balloon balloon: actual=1024 (qemu) balloon 512 (qemu) info balloon balloon: actual=1020 (qemu) info balloon balloon: actual=1020 (qemu) balloon 512 (qemu) info balloon balloon: actual=1018
