From: "David Hildenbrand (Red Hat)" <david@kernel.org>
To: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>,
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 12:45:58 +0100 [thread overview]
Message-ID: <89b5b9e7-d8c1-4402-9fe6-b312630b3d50@kernel.org> (raw)
In-Reply-To: <87tsyemocw.ritesh.list@gmail.com>
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
prev parent reply other threads:[~2025-11-28 11:46 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
2025-11-28 11:45 ` David Hildenbrand (Red Hat) [this message]
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