Bug 865340 - RFE: Do not enable the ballooning device
RFE: Do not enable the ballooning device
Product: Red Hat OpenStack
Classification: Red Hat
Component: openstack-nova (Show other bugs)
1.0 (Essex)
Unspecified Unspecified
unspecified Severity medium
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Assigned To: Daniel Berrange
Yaniv Kaul
: Improvement
Depends On:
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Reported: 2012-10-11 05:20 EDT by Yaniv Kaul
Modified: 2013-07-03 22:52 EDT (History)
4 users (show)

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Doc Type: Enhancement
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Last Closed: 2012-12-17 10:18:55 EST
Type: Bug
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Description Yaniv Kaul 2012-10-11 05:20:27 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)

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Comment 3 Daniel Berrange 2012-12-17 10:18:55 EST
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.

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