[ovirt-users] [FC22] testing oVirt 3.6.2 : Hot plug memory not working

[wodel youchi]

Hi again,

There is no new memory banks created,
example :
before adding memory to the Cento7.2 VM I have 4 directories under
/sys/devices/system/memory

memory0 to memory3 and their status was online.

I augmented the memory from 512 to 1024
the were no new memoryX added
and I had the error mentioned above:

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

both for Centos6 and Centos7

I stopped the VM Centos7, I added augmented the memory again, then started
the VM, now I have new memoryX directories under /sys/devices/system/memory
memory4 to memory7


2016-02-01 15:17 GMT+01:00 Yaniv Dary <ydary at redhat.com>:

> Try:
>
>    1. Look for memory that appears offline.
>
>    Run this command to check the state of the memory:
>
>    grep line /sys/devices/system/memory/*/state
>
>    2. When memory appears offline, run this command to set it to online:
>
>    echo online >/sys/devices/system/memory/memory[number]/state
>
>
> Yaniv Dary
> Technical Product Manager
> Red Hat Israel Ltd.
> 34 Jerusalem Road
> Building A, 4th floor
> Ra'anana, Israel 4350109
>
> Tel : +972 (9) 7692306
>         8272306
> Email: ydary at redhat.com
> IRC : ydary
>
>
> On Mon, Feb 1, 2016 at 3:46 PM, wodel youchi <wodel.youchi at gmail.com>
> wrote:
>
>> What do mean?
>> I have to use RHEL7? What about Centos7 is this unavailable?
>>
>> Regards.
>>
>> 2016-02-01 14:12 GMT+01:00 Yaniv Dary <ydary at redhat.com>:
>>
>>> You need to use EL7 guest.
>>>
>>> Yaniv Dary
>>> Technical Product Manager
>>> Red Hat Israel Ltd.
>>> 34 Jerusalem Road
>>> Building A, 4th floor
>>> Ra'anana, Israel 4350109
>>>
>>> Tel : +972 (9) 7692306
>>>         8272306
>>> Email: ydary at redhat.com
>>> IRC : ydary
>>>
>>>
>>> On Mon, Feb 1, 2016 at 1:16 PM, wodel youchi <wodel.youchi at gmail.com>
>>> wrote:
>>>
>>>> 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 at 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.
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Users mailing listUsers at ovirt.orghttp://lists.ovirt.org/mailman/listinfo/users
>>>>>
>>>>>
>>>>> --
>>>>> Nathanaël Blanchet
>>>>>
>>>>> Supervision réseau
>>>>> Pôle Infrastrutures Informatiques
>>>>> 227 avenue Professeur-Jean-Louis-Viala
>>>>> 34193 MONTPELLIER CEDEX 5 	
>>>>> Tél. 33 (0)4 67 54 84 55
>>>>> Fax  33 (0)4 67 54 84 14blanchet at abes.fr
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Users mailing list
>>>>> Users at ovirt.org
>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>>
>>>>>
>>>>
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>>>>
>>>
>>
>
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