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[2003:cb:c70c:a600:1e3e:c75:d269:867a]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-38dc5a8a9e4sm15765546f8f.10.2025.02.12.02.23.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 12 Feb 2025 02:23:41 -0800 (PST) Message-ID: <9392618e-32de-4a86-9e1e-bcfeefe39181@redhat.com> Date: Wed, 12 Feb 2025 11:23:39 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH v4 2/3] mm/mempolicy: export memory policy symbols To: Shivank Garg , akpm@linux-foundation.org, willy@infradead.org, pbonzini@redhat.com Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-coco@lists.linux.dev, chao.gao@intel.com, seanjc@google.com, ackerleytng@google.com, vbabka@suse.cz, bharata@amd.com, nikunj@amd.com, michael.day@amd.com, Neeraj.Upadhyay@amd.com, thomas.lendacky@amd.com, michael.roth@amd.com References: <20250210063227.41125-1-shivankg@amd.com> <20250210063227.41125-3-shivankg@amd.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: CC0211C0002 X-Stat-Signature: k7jgfhj6y5ftx5s7hdgn4aq5zzcthsb9 X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1739355825-598961 X-HE-Meta: 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 YCD32UAz rJQnFRA26ySUHn+Vojf82lUn9B1HMGBdbIi26q3sCNEgW3uur2YLAZXS0KNlhB214alc8Iv1kOL70udE4KaGTFlH6wVtq+HYqkFDTShcPKx43Ks+NO+ObpisWf3rGlbOOM4zAXwEM9tI1kA7U78BYxiqmS+2jz03V6p4RFs4CWPO0pFk/EhBkKazFB6lV9/zkDLvDUisp+PXzc1k396avlL9h5DzNuZmH7ELi0K2Y/ubn8eKnXGTuChjot+Bv7wEQsn0DgjuqWACblyP7v4wNchpWoCNI8l1XsdeTGog6NrGLSYsntILtimcrDBRP7ct41tkHNLBdaE1b6PNXOf9nOusyBvlBvtWH+Iy+2iwCs/QKnHsQkZ7GIe1GaC2Cs2p80ro8sgWYNwtlJ2ylcv+Shnfx0vDKoIwNYdEaKBuKc0h5NAI= 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 10.02.25 07:32, Shivank Garg wrote: > Export memory policy related symbols needed by the KVM guest-memfd to > implement NUMA policy support. > > These symbols are required to implement per-memory region NUMA policies > for guest memory, allowing VMMs to control guest memory placement across > NUMA nodes. Probably worth mentioning something like "guest_memfd wants to implement support for NUMA policies just like shmem already does using the shared policy infrastructure. As guest_memfd currently resides in KVM module code, we have to export the relevant symbols. In the future, guest_memfd might be moved to core-mm, at which point the symbols no longer would have to be exported. When/if that happens is still unclear." Acked-by: David Hildenbrand -- Cheers, David / dhildenb