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Sun, 07 Dec 2025 19:11:32 -0800 (PST) Received: from devgpu015.cco6.facebook.com (2620:10d:c0a8:1b::30) by mail.thefacebook.com (2620:10d:c0a9:6f::237c) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.2562.29; Mon, 8 Dec 2025 03:11:30 +0000 Date: Sun, 7 Dec 2025 19:11:25 -0800 From: Alex Mastro To: Peter Xu CC: , , , Jason Gunthorpe , Nico Pache , Zi Yan , David Hildenbrand , Alex Williamson , Zhi Wang , David Laight , Yi Liu , Ankit Agrawal , Kevin Tian , Andrew Morton Subject: Re: [PATCH v2 4/4] vfio-pci: Best-effort huge pfnmaps with !MAP_FIXED mappings Message-ID: References: <20251204151003.171039-1-peterx@redhat.com> <20251204151003.171039-5-peterx@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20251204151003.171039-5-peterx@redhat.com> X-Originating-IP: [2620:10d:c0a8:1b::30] X-Authority-Analysis: v=2.4 cv=ZIPaWH7b c=1 sm=1 tr=0 ts=693641e4 cx=c_pps a=MfjaFnPeirRr97d5FC5oHw==:117 a=MfjaFnPeirRr97d5FC5oHw==:17 a=kj9zAlcOel0A:10 a=wP3pNCr1ah4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=cCa_CVtDXYSc011Sr6sA:9 a=CjuIK1q_8ugA:10 X-Proofpoint-GUID: i1OkR2zPIMdJjvRRdpVqF_xjZi1juKv5 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjA4MDAyNSBTYWx0ZWRfX5nK+Tc/ZJJsi QhadGeGPvSVp4T22yoZpnRWgwVPvXIObvTMLv/q5HpmzEZ9aAbwzhIqHBWCp/QIGaBmDfuJref1 M6e9US7i0Zap/5ba16bT8drdORPBRsp/ijkfkWcc5kVe+sQuSyp7A2LKKuSfwpcSCuVawQq5MCa cwnUKALCjyJ+dSlOXUDnI0/jANwfFjarErArnOQO+TLf/kOmDc7ARoHladPfiZz9rdvpcCR0lGM lvnPrmVJVz7jIL8OOrcfy903DNdunbEWn4fshx8Rmr/ZQElJ2wr4+QiixNQwJlbQizQVabQdg64 giEypRJBLACssjRlqeyqwLJxcAO8c5eg5pui/UiNtIPW1Cq0pRmmM5URPCRLBA+7C8j680Pqthb GPfaVMG4dr5wOYy0nxktuOJmRrneUQ== X-Proofpoint-ORIG-GUID: i1OkR2zPIMdJjvRRdpVqF_xjZi1juKv5 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-06_02,2025-12-04_04,2025-10-01_01 X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: F278E40002 X-Stat-Signature: 8njr9x7gshh7qr9qo4fporrwi8txwfbg X-Rspam-User: X-HE-Tag: 1765163495-394229 X-HE-Meta: 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 Ic8EBpjd j4x1OlKp+Ks6uouYX+a3S/MssStAuNAciss/dMr0pTWkGaDJYYj6bpmskGE0s9/nePt34ezzCnZvV8xfeXHI12DJ7KpnnwzRTT7FOTSvvj2e3WPYbsfBIpofe3FTnPkmK4c/6Ku1aNJweh6bzqNASutvDDgvlYEBjyueZy26z8WrDIpBuWsw/Y4vDP6PaJ9iRu9LHNy2SE+zdnD71Yxp3I+vZD0HzPjfklqkqM9qBnZ6wY27OcUL+gcOokwP6hcR0UtQN 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 Thu, Dec 04, 2025 at 10:10:03AM -0500, Peter Xu wrote: > To achieve that, a custom vfio_device's get_mapping_hint() for vfio-pci > devices is needed. nit get_mapping_order()