[et-mgmt-tools] virt-manager doesn't update the memory usage in the list

[Daniel P. Berrange]

On Thu, Apr 26, 2007 at 02:43:41PM -0400, Hugh Brock wrote:
> Source wrote:
> >Hello,
> >
> >Well I have created a new virtual machine using virt-manager (hypervisor 
> >Qemu-KVM). Now earlier I had allocated 256MB RAM to the virtual machine. 
> >Now when I try to change it from right clicking the VM (in the list 
> >shown by virt-manager) and selecting details , hardware , memory and 
> >decreasing it to 128MB it doesn't update it. It shows the updated value 
> >in Hardware->Memory but when I apply it , it doesn't get updated in 
> >Virt-manager main windows VM Lists. So when I restart virt-manager I am 
> >still shown 256MB RAM in the main window and also in 
> >Details>Hardware>Memory.
> >
> >Can't I change the memory limit after creating the VM. It's a redhat 
> >enterprise 5 Fully virtualized guest.
> >
> >And if I can't change it then how can I edit the RAM limits in 
> >Details>Hardware>Memory.
> >
> Hi.
> 
> Unfortunately, you can't modify the vcpus or memory for a fully 
> virtualized guest while it's running. If virt-manager is letting you do 
> that, that's a bug, we should fix it (I assume the guest is running when 
> you do this?).

Well that's fuzzy actually. There's no reason you can't drop an paravirt
balloon driver module into a fullvirt guest if you were so inclined to
write one. Likewise in theory a guest could also do CPU hotplug. So
while we could block those options in the UI for fullvirt, we should
expect to have to unblock them in the future at least :-)


Dan.
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