[PATCH v1 0/2] powerpc/pseries/cmm: two smaller fixes
Ritesh Harjani (IBM)
ritesh.list at gmail.com
Fri Nov 28 21:40:47 AEDT 2025
"David Hildenbrand (Red Hat)" <david at 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
-ritesh
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