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b=NCDlaJ1xHq7jQKrG9HYERIFWL4+6bYQzSi84yWcrHIc+mJJJwfcJjCbahGIOCLGJk N9MgQCYV0gXSUhrIFLGQlHDQ1U0Tex0R5nHiCBATbIIrAQMWe5E11T46cKFjg5O5V9 CG8+OGkEC9vfC8Ug9PP3vjliWkM2EKMR8SfSZ8g3P7TetdMKvCyR7Z0GM5i1ZvuPMC /vToiwFKxj/lbcrcxoXnI0JWsQPq3bAAJpmfH86B5oCm/O8ZEGMIRSK6pQ/KOKuWZ+ 65YuH9Bnu9x00I4PG7CLbXhODhUFczkS2h73y9msGtTGRSfiBfcv/4wf1e4K3UiZRg ho3SwP6DLzF4w== Message-ID: <89b5b9e7-d8c1-4402-9fe6-b312630b3d50@kernel.org> Date: Fri, 28 Nov 2025 12:45:58 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 0/2] powerpc/pseries/cmm: two smaller fixes To: "Ritesh Harjani (IBM)" , linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, Andrew Morton , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy References: <20251021100606.148294-1-david@redhat.com> <557b5500-412a-4d26-8c4b-147c9a00d5fd@kernel.org> <87zf86n3vq.ritesh.list@gmail.com> <3cc7d401-c77c-4ac8-abb8-c264fbd9aaf0@kernel.org> <87y0nqmwaz.ritesh.list@gmail.com> <189ac734-b194-4b52-9752-18d8c0b71377@kernel.org> <87tsyemocw.ritesh.list@gmail.com> From: "David Hildenbrand (Red Hat)" Content-Language: en-US In-Reply-To: <87tsyemocw.ritesh.list@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 44EBC40011 X-Rspamd-Server: rspam06 X-Rspam-User: X-Stat-Signature: u9aw9qdcbnex4ue15awe3qn8tgkacd87 X-HE-Tag: 1764330364-471739 X-HE-Meta: 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 1PLuG3R7 SHBxNTLVe4I2RTGcQoYM/se+fIw16p44HLLuQ X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 11/28/25 11:40, Ritesh Harjani (IBM) wrote: > "David Hildenbrand (Red Hat)" 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