On Tue, Jan 05, 2010 at 09:43:32AM +0200, Dor Laor wrote:
On 01/04/2010 07:13 PM, Adam Litke wrote:
The behavior for the qemu balloon device has changed. Formerly, a virtio balloon device was provided by default. Now, '-balloon virtio' must be specified on the command line to enable it. This patch causes libvirt to add '-balloon virtio' to the command line whenever the -balloon option is available.
Why add it automatically? I rather have the user state explicitly that a balloon is required. If the balloon is not used, we're just wasting a pci slot and enlarge the hypervisor signature.
I'm in favor of using the balloon driver, but there are occasions it won't be required or we won't have a guest driver for it.
Not having the balloon driver present is a regression from earlier libvirt behaviour, and likewise requiring it to be explicitly added to a guest will cause an immediate regression for all apps using libvirt Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|