On 8 Jun 2020, at 07:43, Michal Skrivanek <michal.skrivanek@redhat.com> wrote:



On 5 Jun 2020, at 20:23, Vinícius Ferrão <ferrao@versatushpc.com.br> wrote:

Hi Michal

On 5 Jun 2020, at 04:39, Michal Skrivanek <michal.skrivanek@redhat.com> wrote:



On 5 Jun 2020, at 08:19, Vinícius Ferrão via Users <users@ovirt.org> wrote:

Hello, I’m trying to run ppc64le VM’s on POWER9 but qemu-kvm fails complaining about NUMA issues:

that is not a line you should be looking at, it’s just a harmless warning.
I suppose it’s the other one, about spectre fixes

VM ppc64le.local.versatushpc.com.br is down with error. Exit message: internal error: qemu unexpectedly closed the monitor: 2020-06-05T06:16:10.716052Z qemu-kvm: warning: CPU(s) not present in any NUMA nodes: CPU 4 [core-id: 4], CPU 5 [core-id: 5], CPU 6 [core-id: 6], CPU 7 [core-id: 7], CPU 8 [core-id: 8], CPU 9 [core-id: 9], CPU 10 [core-id: 10], CPU 11 [core-id: 11], CPU 12 [core-id: 12], CPU 13 [core-id: 13], CPU 14 [core-id: 14], CPU 15 [core-id: 15] 2020-06-05T06:16:10.716067Z qemu-kvm: warning: All CPU(s) up to maxcpus should be described in NUMA config, ability to start up with partial NUMA mappings is obsoleted and will be removed in future 2020-06-05T06:16:11.155924Z qemu-kvm: Requested safe indirect branch capability level not supported by kvm, try cap-ibs=fixed-ibs.

Any idea of what’s happening?

I found some links, but I’m not sure if they are related or not:

yes, they look relevant if that’s the hw you have. We do use pseries-rhel7.6.0-sxxm machine type in 4.3 (not in 4.4. that would be the preferred solution, to upgrade).
If you don’t care about security you can also modify the machine type per VM (or in engine db for all VMs) to "pseries-rhel7.6.0"

I’m using an AC922 machine.

and is it oVirt  4.3 or 4.4?
Bug 1732726 is on RHEL 8, so relevant only for oVirt 4.4, i.e. you’d have to have a 4.3 cluster level?
if you really want to keep using -sxxm you need to modify it to add the extra flag the bug talks about

this shouldn’t be needed in 4.4 cluster level though

Hi Michal, I’m running 4.3.10. Not in 4.4 yet.

So the workaround would be add cap-ibs=fixed-ibs to VM parameters so sxxm would work? Where do I add this? Do you know?

Thanks.



In fact I can boot the VMs with pseries-rhel7.6.0 but not with pseries-rhel7.6.0-sxxm; how do you made pseries-rhel7.6.0-sxxm works on 4.3 release?

# lscpu
Architecture:          ppc64le
Byte Order:            Little Endian
CPU(s):                128
On-line CPU(s) list:   0-127
Thread(s) per core:    4
Core(s) per socket:    16
Socket(s):             2
NUMA node(s):          6
Model:                 2.2 (pvr 004e 1202)
Model name:            POWER9, altivec supported
CPU max MHz:           3800.0000
CPU min MHz:           2300.0000
L1d cache:             32K
L1i cache:             32K
L2 cache:              512K
L3 cache:              10240K
NUMA node0 CPU(s):     0-63
NUMA node8 CPU(s):     64-127
NUMA node252 CPU(s):   
NUMA node253 CPU(s):   
NUMA node254 CPU(s):   
NUMA node255 CPU(s): 

Thank you for helping out.


Thanks,
michal

Thanks,

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