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Mon, 26 Jan 2026 09:40:13 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id EK9DIn02d2lIZwAAD6G6ig (envelope-from ); Mon, 26 Jan 2026 09:40:13 +0000 Message-ID: <307fc682-3dde-4874-9115-678b8e6ce2d4@suse.cz> Date: Mon, 26 Jan 2026 10:40:13 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 02/10] mm/vma: document possible vma->vm_refcnt values and reference comment Content-Language: en-US To: Lorenzo Stoakes , Andrew Morton Cc: David Hildenbrand , "Liam R . Howlett" , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Shakeel Butt , Jann Horn , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev, Peter Zijlstra , Ingo Molnar , Will Deacon , Boqun Feng , Waiman Long , Sebastian Andrzej Siewior , Clark Williams , Steven Rostedt References: From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSBWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmN6PsLBlAQTAQoAPgIbAwULCQgHAwUVCgkICwUWAgMBAAIe AQIXgBYhBKlA1DSZLC6OmRA9UCJPp+fMgqZkBQJnyBr8BQka0IFQAAoJECJPp+fMgqZkqmMQ AIbGN95ptUMUvo6aAdhxaOCHXp1DfIBuIOK/zpx8ylY4pOwu3GRe4dQ8u4XS9gaZ96Gj4bC+ jwWcSmn+TjtKW3rH1dRKopvC07tSJIGGVyw7ieV/5cbFffA8NL0ILowzVg8w1ipnz1VTkWDr 2zcfslxJsJ6vhXw5/npcY0ldeC1E8f6UUoa4eyoskd70vO0wOAoGd02ZkJoox3F5ODM0kjHu Y97VLOa3GG66lh+ZEelVZEujHfKceCw9G3PMvEzyLFbXvSOigZQMdKzQ8D/OChwqig8wFBmV QCPS4yDdmZP3oeDHRjJ9jvMUKoYODiNKsl2F+xXwyRM2qoKRqFlhCn4usVd1+wmv9iLV8nPs 2Db1ZIa49fJet3Sk3PN4bV1rAPuWvtbuTBN39Q/6MgkLTYHb84HyFKw14Rqe5YorrBLbF3rl M51Dpf6Egu1yTJDHCTEwePWug4XI11FT8lK0LNnHNpbhTCYRjX73iWOnFraJNcURld1jL1nV r/LRD+/e2gNtSTPK0Qkon6HcOBZnxRoqtazTU6YQRmGlT0v+rukj/cn5sToYibWLn+RoV1CE Qj6tApOiHBkpEsCzHGu+iDQ1WT0Idtdynst738f/uCeCMkdRu4WMZjteQaqvARFwCy3P/jpK uvzMtves5HvZw33ZwOtMCgbpce00DaET4y/UzsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZ8gcVAUJFhTonwAKCRAiT6fnzIKmZLY8D/9uo3Ut9yi2YCuASWxr7QQZ lJCViArjymbxYB5NdOeC50/0gnhK4pgdHlE2MdwF6o34x7TPFGpjNFvycZqccSQPJ/gibwNA zx3q9vJT4Vw+YbiyS53iSBLXMweeVV1Jd9IjAoL+EqB0cbxoFXvnjkvP1foiiF5r73jCd4PR rD+GoX5BZ7AZmFYmuJYBm28STM2NA6LhT0X+2su16f/HtummENKcMwom0hNu3MBNPUOrujtW khQrWcJNAAsy4yMoJ2Lw51T/5X5Hc7jQ9da9fyqu+phqlVtn70qpPvgWy4HRhr25fCAEXZDp xG4RNmTm+pqorHOqhBkI7wA7P/nyPo7ZEc3L+ZkQ37u0nlOyrjbNUniPGxPxv1imVq8IyycG AN5FaFxtiELK22gvudghLJaDiRBhn8/AhXc642/Z/yIpizE2xG4KU4AXzb6C+o7LX/WmmsWP Ly6jamSg6tvrdo4/e87lUedEqCtrp2o1xpn5zongf6cQkaLZKQcBQnPmgHO5OG8+50u88D9I rywqgzTUhHFKKF6/9L/lYtrNcHU8Z6Y4Ju/MLUiNYkmtrGIMnkjKCiRqlRrZE/v5YFHbayRD dJKXobXTtCBYpLJM4ZYRpGZXne/FAtWNe4KbNJJqxMvrTOrnIatPj8NhBVI0RSJRsbilh6TE m6M14QORSWTLRg== In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Action: no action X-Rspamd-Server: rspam11 X-Stat-Signature: dc6qoftt9p534hwh39f9ebajqgwpxkox X-Rspam-User: X-Rspamd-Queue-Id: D39DF18000D X-HE-Tag: 1769420415-944096 X-HE-Meta: U2FsdGVkX1+KWOUaUR1kFOrzJ4HrTT8IKIQz1eK1fZ6DWtFmiZqpCLKI/zxu17GYysLCr+OTJPAP1cWOePSFqNectE/4XZsDCm2m/XFEnk5o7WeQaLjf3Ukiq6Pnjrq2PBKya1YDeiG8n2hO4gCHllouExGMyUECHcw9kK/yUIUyDD+nAnuxUs0BAf3mB4/C+sR68JuAI8aPa00wnLvGHDyPCZkCF5w+MVdi65PIV3ydkk1VbyrmEODKG8wnpu+vDpBxmhQDD33ixg5eaT3E0fb5gQ/lOp+mVNC6y5fm9IbjfNt4DHcFlT+PREf5JsL0B27s4ZgW7Ar/f/pTLgZMnZNjjHqUq6jq/e7bmP4/n3DsKsFGvqWCYri0Y0+zXhB58L4OAEk4BNmqqOIKATPpHM3XXkN/CpehKSqC8uIFTbTuizk3WQTMbkMysOk2k/X3Rpry0msVR3QDwz3tNm4PnlevWVQLHU+mZTdfUeCzkZoJb1vPrl62F9/01od2gqBWh7NJKjcezTFopKY2omp/BaA2gd8NEAJUrtd1xKe9pHJA2zZC8rcVWIu0Ul6Vu3ylvfyvAziwOllDCZJchAm904Flw+c250Iw9+rgPe+ENxYPzISpOu8esLnjcw/7tApghyCW4ztBkQPU0nGBuEoBdG4Qicoqd+CJieZX9O3CFzvQXjaH1U7N1Lxt6ufRyFEgW79QdD4EcLY2igR4uzmhDfCiB5Q6+hhK4YPMGcexwRvOdZjCnrtmq1Z2WBEhZlg9m+HbuuA6NMrUVUhujkASWW+fg+n3/zdpST7IFxUa50oUV7dLN8BpfvbApsX3aNlxuTc69bvSpa6UKZkTlwNl0deHdhjoJZIdLQgD3AbEnFX9xsnvUhpiIOwXrs56CU1v2RFOUeFlPki6A5R1kG7COANsHep5M357bFjVaP8bCJh4jBl1s1mNr9GRvmvrB9CMNAwTAzhdBHCf1EWPSro /ddaOtHX VIHBUF5vgyhF+IpcFpMt4+cOCZvh9kFVWkCLx3BdthusFe96PPbZUS1jvdg/LDnTp7f7DwBR28CT5gvFDOq0Vq7N4VQXJiKRmQUwqX6hOO55ZmuFnbTf0nNfX+W1lN1IrjhezRolMaxr4IStpZX26MzJn5c3Lc8CPtOeLnZC6INv9mwuGeXjdGx0R+KWV1Y4Mmj9hX/Dv2l+AROoN31lZ7doP9xAZN2u4DCqztjG8Nq0uBDNZ1k5o07GUHTvZXxXstrhaRGWGeDE0hOJm8s5ioD/KwA0lw6RnvGsvTnezJ74LXvBIlj8IeD23isf2E7hNLa+pOA9cLu2L423FjdlKfFNRLWePgJgkgcRVFidGGkWc3aQL9LVrgu7aeH27sj3kBZ6Gpine0GrzUsh6W8iGRssEVpuP7MinT7w8gh5mRqrIRBE= 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 1/23/26 21:12, Lorenzo Stoakes wrote: > The possible vma->vm_refcnt values are confusing and vague, explain in > detail what these can be in a comment describing the vma->vm_refcnt field > and reference this comment in various places that read/write this field. > > No functional change intended. > > Signed-off-by: Lorenzo Stoakes Reviewed-by: Vlastimil Babka