From: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
To: "David Hildenbrand (Red Hat)" <david@kernel.org>,
linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org,
Andrew Morton <akpm@linux-foundation.org>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>
Subject: Re: [PATCH v1 0/2] powerpc/pseries/cmm: two smaller fixes
Date: Fri, 28 Nov 2025 16:10:47 +0530 [thread overview]
Message-ID: <87tsyemocw.ritesh.list@gmail.com> (raw)
In-Reply-To: <189ac734-b194-4b52-9752-18d8c0b71377@kernel.org>
"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
-ritesh
next prev parent reply other threads:[~2025-11-28 10:44 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-21 10:06 David Hildenbrand
2025-10-21 10:06 ` [PATCH v1 1/2] powerpc/pseries/cmm: call balloon_devinfo_init() also without CONFIG_BALLOON_COMPACTION David Hildenbrand
2025-11-28 9:07 ` Ritesh Harjani
2025-10-21 10:06 ` [PATCH v1 2/2] powerpc/pseries/cmm: adjust BALLOON_MIGRATE when migrating pages David Hildenbrand
2025-11-28 10:12 ` Ritesh Harjani
2025-11-26 15:40 ` [PATCH v1 0/2] powerpc/pseries/cmm: two smaller fixes David Hildenbrand (Red Hat)
2025-11-28 5:05 ` Ritesh Harjani
2025-11-28 7:36 ` David Hildenbrand (Red Hat)
2025-11-28 7:49 ` Ritesh Harjani
2025-11-28 8:10 ` David Hildenbrand (Red Hat)
2025-11-28 8:24 ` David Hildenbrand (Red Hat)
2025-11-28 10:40 ` Ritesh Harjani [this message]
2025-11-28 11:45 ` David Hildenbrand (Red Hat)
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