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Wed, 25 Feb 2026 11:58:34 -0800 (PST) MIME-Version: 1.0 References: <67a62716952c806c2a512e98bcac1f5224ada324.1770854662.git.ackerleytng@google.com> In-Reply-To: <67a62716952c806c2a512e98bcac1f5224ada324.1770854662.git.ackerleytng@google.com> From: James Houghton Date: Wed, 25 Feb 2026 11:57:58 -0800 X-Gm-Features: AaiRm52wU6KkL251Z2G8sJq02VAiPYyNCCNpcDmsxM2CKPU8i6iZmZDmernmq44 Message-ID: Subject: Re: [RFC PATCH v1 3/7] mm: hugetlb: Move mpol interpretation out of dequeue_hugetlb_folio_vma() To: Ackerley Tng Cc: akpm@linux-foundation.org, dan.j.williams@intel.com, david@kernel.org, fvdl@google.com, hannes@cmpxchg.org, jgg@nvidia.com, jiaqiyan@google.com, kalyazin@amazon.com, mhocko@kernel.org, michael.roth@amd.com, muchun.song@linux.dev, osalvador@suse.de, pasha.tatashin@soleen.com, pbonzini@redhat.com, peterx@redhat.com, pratyush@kernel.org, rick.p.edgecombe@intel.com, rientjes@google.com, roman.gushchin@linux.dev, seanjc@google.com, shakeel.butt@linux.dev, shivankg@amd.com, vannapurve@google.com, yan.y.zhao@intel.com, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 0116216000F X-Stat-Signature: x8mwqju5cwr65hkfqj3z363ruowhocai X-Rspam-User: X-HE-Tag: 1772049516-955846 X-HE-Meta: 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 P47P2BtS zbwnU1glqfA2sds4Fj2+yqtR9dpfcp01Ipdu6+o+XR5xSrKkq0jcapWeHukpRKP1XTGAs033uoJyXQVkZ9pkVv+OFker61nUkh4Vp2p4gI6WQljFws5q/KE5yph6e7dIRGzlu5HaUTawvGFxM+9HEliLJzNW1QjqqbctltoEmVewoSicl7/eAfkoC8mi0fApTkGsOvdMBzcqBKlKxVT861y9EMPtTztLSMGPHlJ/RSuIDqXlon0XbJVMvML25AUyrp/j7q0JIgQ8E8UjwS5dHeG50KyoM1x1AWAZIV5HetGv24Ac/hWsyPPH+bF7KeinCqHrTmMfUHX6OV8FHsMKBIcEmY22r+lU6KTKEf0DXPILaJlWpnEjjpENkK0+lzflie7/ec7aR+Dm2FFE= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Feb 11, 2026 at 4:37=E2=80=AFPM Ackerley Tng wrote: > > Move memory policy interpretation out of dequeue_hugetlb_folio_vma() and > into alloc_hugetlb_folio() to separate reading and interpretation of memo= ry > policy from actual allocation. > > Also rename dequeue_hugetlb_folio_vma() to > dequeue_hugetlb_folio_with_mpol() to remove association with vma and to > align with alloc_buddy_hugetlb_folio_with_mpol(). > > This will later allow memory policy to be interpreted outside of the > process of allocating a hugetlb folio entirely. This opens doors for othe= r > callers of the HugeTLB folio allocation function, such as guest_memfd, > where memory may not always be mapped and hence may not have an associate= d > vma. > > No functional change intended. > > Signed-off-by: Ackerley Tng Reviewed-by: James Houghton