[Ovirt-devel] how to Increase memory for vm online ?

[pronix pronix]

kernel documentation
ram hotplug
linux-2.6.27/Documentation/memory-hotplug.txt
cpu hotplug
linux-2.6.27/Documentation/cpu-hotplug.txt


2008/12/26 Perry Myers <pmyers at redhat.com>:
> Guido � wrote:
>>
>> On Thu, Dec 25, 2008 at 10:42:48PM +0300, pronix pronix wrote:
>>>
>>> I found virtio_balloon.ko
>>> but can't find how it work.
>>>
>>> 2008/12/25 Perry Myers <pmyers at redhat.com>:
>>>>
>>>> �� wrote:
>>>>>
>>>>> how to increase RAM on running vm ?
>>>>
>>>> As far as I know, kvm doesn't allow memory hotplug.  So in order to give
>>>> a
>>>> vm more memory you need to shut the vm down, adjust the memory and then
>>>> restart.
>>>>
>>>> I'm not sure where memory hotplug is on the list of features for kvm,
>>
>> See the balloon monitor command in recent kvm. This needs to be hooked
>> into libvirt's qemudDomainSetMemory.
>>  -- Guido
>
> Guido,
>
> How does the guest support this?  Do Windows/Linux OSes support hotplug
> (add/remove) of system memory dynamically or are additional guest drivers
> needed for this?
>
> Thanks,
>
> Perry
>