[ovirt-users] Memory hot plug

[Eduardo Mayoral]

Thanks for your reply!

You are right. I tried with a CentOS 6 and a CentOS 7 guest and both
picked the extra memory with no problem.

Seems it was a particular issue with the guest that I tried first.
Kernel version was older and I had to activate the memory bank as
described in https://kb.vmware.com/s/article/1012764 (different
hypervisor, but the principle is the same).

Best regards,

Eduardo Mayoral Jimeno (emayoral at arsys.es)
Administrador de sistemas. Departamento de Plataformas. Arsys internet.
+34 941 620 145 ext. 5153

On 21/03/18 15:45, Luca 'remix_tj' Lorenzetto wrote:
> Hello Eduardo,
>
> On Wed, Mar 21, 2018 at 3:17 PM, Eduardo Mayoral <emayoral at arsys.es> wrote:
>> Hi,
>>
>>     I recently tried to hot plug some memory on a VM running CentOS 6.9 with
>> ovirt-guest-tools installed.
>>
>>     oVirt version is 4.2.1.6-1.el7.centos
>>
>>     I was careful to increment a multiple of 256 MB as specified in
>> https://www.ovirt.org/develop/release-management/features/virt/hot-plug-memory/
>> (4 GB -> 6 GB , maximum memory configured for the VM was 8 GB)
>>
>>     However the VM was marked as with a pending change for next reboot. Am I
>> missing some non-default configuration requiered for memory hot-plug to
>> work?
>
> No, you're not. Now the vm is seeing the base memory (4GB) you were
> seeing at boot, plus additional memory (2GB added). Next time you'll
> boot the vm, the system will see a single block of 6 GB.
>
> That's the difference.
>
> Luca
>