Re: [PATCH v1 0/2] powerpc/pseries/cmm: two smaller fixes

David Hildenbrand (Red Hat)
2025-11-28T11:46:03Z

On 11/28/25 11:40, Ritesh Harjani (IBM) wrote:
> "David Hildenbrand (Red Hat)" <david@kernel.org> writes:
>
>>>>
>>>> Right. Let me give it a try first with pseries Qemu. Otherwise I have an
>>>> access to pseries LPAR too. I can verify it there.
>>>
>>> Ah, now I realize my problem: I tried with Fedora 43 in a powerpc VM but
>>> the modprobe didn't do anything.
>>>
>>> Looking again:
>>>
>>> # grep CONFIG_CMM /boot/config-6.17.1-300.fc43.ppc64le
>>> CONFIG_CMM=y
>>>
>>> So modprob'ing won't do as the module is built in.
>>
>> Right, so doing "cmm.simulate=1" on the cmdline in a Fedora 43 VMs
>> properly creates the CMM device.
>>
>
> Right verifying using simulate mode is very straightforward. Thanks for that!
> So.. using various random echo X > simulate_loan_target_kb on a VM...
>
> ~# cat /proc/vmstat |grep balloon
> nr_balloon_pages 16
> balloon_inflate 1638
> balloon_deflate 1622
> balloon_migrate 4

Thanks a bunch for the review and testing!

--
Cheers

David