Hi,

I tried with the Centos6x64 VM, I didn't work, in ovirt's webui I have this error :

VDSM Noveria command failed: unsupported configuration: unknown device type 'memory'
Failed to hot set memory to VM mail10. Underlying error message: unsupported configuration: unknown device type 'memory'

Looking into /sys/devices/system/memory there is no new memory banks added.

But, I tested with another VM, Centos7x64 which I updated with latest packages : CentOS Linux release 7.2.1511 (Core)

I tried to add memory, but I had the same error on ovirt's webui, I did not work neither with el6x64 or el7x64

and /sys/devices/system/memory didn't change, there are no new entries

Regards

2016-02-01 10:30 GMT+01:00 Nathanaël Blanchet <blanchet@abes.fr>:

Hi,

the hot add features starts working out of the box from centos 7.2 guest.
On previous el7.x, two ways to do that:

5.2. How to online memory
------------
Even if the memory is hot-added, it is not at ready-to-use state.
For using newly added memory, you have to "online" the memory block.

For onlining, you have to write "online" to the memory block's state file as:

% echo online > /sys/devices/system/memory/memoryXXX/state

or to be active at boot, add this udev rule in /lib/udev/rules.d/55-ovirt-guest-agent.rules :

SUBSYSTEM=="memory", ACTION=="add", TEST=="state", ATTR{state}=="offline", ATTR{state}="online"

I can't tell you if this works on el6 guest, but why not testing for us ;)

Le 01/02/2016 10:04, wodel youchi a écrit :
Hi,

I am using oVirt 3.6.2 on FC22 box, all-in-one installation, my purpose is to test it.

I am using a simple Desktop :
- one cpu core i5 3550 with 4 cores

- 2x4 Go of RAM

I installed a Centos 6x64 VM with all updates + ovirt guest agent.

I tried to augment the memory from 1024 to 1536 (+512Mo) it didn't work I had to shutdown the VM for the change to take effect.

Hot plug memory does it have something to do with the underneath hardware?

or does it depend on the guest OS?

or something else?

Regards.
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