Red Hat Bugzilla – Bug 865340
RFE: Do not enable the ballooning device
Last modified: 2013-07-03 22:52:27 EDT
Description of problem:
Currently, we enable the ballooning device, although we don't use it. It only takes a PCI slot, and provides no value whatsoever.
(-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 in the QEMU command line)
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Even if the balloon device isn't used for ballooning memory, it can still be used to access guest OS memory statistics, which does provide value. I don't believe typical cloud deployment is going to be running into the PCI device slot limit for virtio disks, and even if it did, we would be better off using virtio-scsi to increase the max disk limit, rather than dropping virtio balloon which merely gains you 1 extra disk.