[pve-devel] [PATCH 10/11] add balloon device

[Dietmar Maurer]

Sorry, but I still not know the purpose of the balloon device. What is the proposed usage scenario?

AFAIR you can use that to hotplug additional memory, but reducing memory does not work?

- Dietmar Maurer

> -----Original Message-----
> From: pve-devel-bounces at pve.proxmox.com [mailto:pve-devel-
> bounces at pve.proxmox.com] On Behalf Of Derumier Alexandre
> Sent: Mittwoch, 07. September 2011 15:35
> To: pve-devel at pve.proxmox.com
> Subject: [pve-devel] [PATCH 10/11] add balloon device
> 
> new vm config option:
> 
> balloon:  1/0    enable/disable balloon device
> 
> Signed-off-by: Derumier Alexandre <aderumier at odiso.com>
> ---
>  PVE/QemuServer.pm |   10 ++++++++++
>  1 files changed, 10 insertions(+), 0 deletions(-)
> 
> diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm index 5cce444..07bc7f1
> 100644
> --- a/PVE/QemuServer.pm
> +++ b/PVE/QemuServer.pm
> @@ -296,6 +296,12 @@ EODESC
>          type => 'string',
>          description => "Action on watchdog event
> reset/shutdown/poweroff/pause/debug/none",
>      },
> +    balloon => {
> +	optional => 1,
> +	type => 'boolean',
> +	description => "Enable/disable Balloon device.",
> +	default => 1,
> +    },
>      hostpci => {
>  	optional => 1,
>          type => 'string', format => 'pve-qm-hostpci', @@ -2037,6 +2043,10 @@
> sub config_to_command {
>      my $kb = $conf->{keyboard} || $defaults->{keyboard};
>      push @$cmd, '-k', $kb if $kb;
> 
> +    # enable balloon device
> +    my $balloon = $conf->{balloon} || $defaults->{balloon};
> +    push @$cmd, '-device', 'virtio-balloon-pci,id=balloon0';
> +
>      # enable watchdog device
>      my $watchdog = $conf->{watchdog} || $defaults->{watchdog};
>      push @$cmd, '-device', $watchdog.',id=watchdog0' if $watchdog;
> --
> 1.7.2.5
> 
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