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Fri, 1 Aug 2025 08:42:28 +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 oYZ4FPR9jGg9LAAAD6G6ig (envelope-from ); Fri, 01 Aug 2025 08:42:28 +0000 Message-ID: <61ef9a4e-cc9d-46c9-94cf-4d9231ded749@suse.cz> Date: Fri, 1 Aug 2025 10:42:27 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/2] mm: limit the scope of vma_start_read() Content-Language: en-US To: Suren Baghdasaryan , akpm@linux-foundation.org Cc: jannh@google.com, Liam.Howlett@oracle.com, lorenzo.stoakes@oracle.com, pfalcato@suse.de, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20250731151919.212829-1-surenb@google.com> 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: <20250731151919.212829-1-surenb@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 36D6CC0014 X-Stat-Signature: kdpg5yjnnqn44exddt35u7wo6eu7pmk1 X-HE-Tag: 1754037749-207193 X-HE-Meta: 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 NYF3Qg45 jSbp88xNiTxUwiXS0po4N2Z1tCzrdNEjjrBJ9uQAGwsgwDEfCZrh+lCpyZeJraSyOWDNO2U13KImpArJmHe5CrpunH0GZIJba3nMs7sjkL4kSpYJFdqR/4xDi9t5Zjn9xgiQZXFi3zg1tHhVt+kz+FQtTUVN6dXlt4CjjWxcRGTwp6ikq7nVKCPs0qyJl1cAM0QRgvN9nVVAQyYiU1eoAcMzlLBB6T/GN4v8ar48OirJ2Oezq1EkNkHinGlH8jnh3mR7z4Pi3uSREzvfZCfeqZ4qq6ubR4LiKeB4TY85lJow2trdAy9DoLsptDqSANYE9v7f9oeZALPJFNyw+kc1t59R1c6i4zVW3vash 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 7/31/25 17:19, Suren Baghdasaryan wrote: > Limit the scope of vma_start_read() as it is used only as a helper for > higher-level locking functions implemented inside mmap_lock.c and we are > about to introduce more complex RCU rules for this function. > The change is pure code refactoring and has no functional changes. > > Suggested-by: Vlastimil Babka > Signed-off-by: Suren Baghdasaryan Reviewed-by: Vlastimil Babka