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@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@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-memo... (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