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Fri, 30 May 2025 07:17:37 +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 /koFFZFbOWhaTAAAD6G6ig (envelope-from ); Fri, 30 May 2025 07:17:37 +0000 Message-ID: <51d7af3f-a5a1-4a93-967d-dc4866060a28@suse.cz> Date: Fri, 30 May 2025 09:17:37 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 4/4] tools/testing/selftests: add VMA merge tests for KSM merge Content-Language: en-US To: Lorenzo Stoakes , Andrew Morton Cc: Alexander Viro , Christian Brauner , Jan Kara , "Liam R . Howlett" , Jann Horn , Pedro Falcato , David Hildenbrand , Xu Xin , Chengming Zhou , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Stefan Roesch References: <6dec7aabf062c6b121cfac992c9c716cefdda00c.1748537921.git.lorenzo.stoakes@oracle.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: <6dec7aabf062c6b121cfac992c9c716cefdda00c.1748537921.git.lorenzo.stoakes@oracle.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 24E894000A X-Stat-Signature: kqeo8446s6e87zag6t6wnkqzcxqax4bk X-Rspam-User: X-HE-Tag: 1748589459-467315 X-HE-Meta: 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 9duIm5EU vrPokdAJkEnxVSMFmeITc/L1fqjmJJJ9Y20mKrIrDmyjdMm0xWsyAMHbpPjrqZ8CQIcRAD5dhI8iky6H0q1jxaaOHLgsr4UEgptZ7B+Z7IekCXiq1Lp8QkkYOx24xkuz4PCHwGG0khzCWf3b3QTE8QnMIAnE3DyUPuA47bHeOCLLq6QFpIBh9Tj7U6Q4K82CTaVPmOnCLadteWJaZNEHu4Zo3ukjZqCAow8D6I2cYMNqmXqTUuP0rUQ23jFGTDq0iJXlfgRomjJm1fYLiIgx6b4/Jg/bGO7/aIwqTbwd2i29laSN3q3TyIVshUdjDjJrk1JmYa2rEOd1aqcClH98iKMGSetvQNDi7Ly1i 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 5/29/25 19:15, Lorenzo Stoakes wrote: > Add test to assert that we have now allowed merging of VMAs when KSM > merging-by-default has been set by prctl(PR_SET_MEMORY_MERGE, ...). > > We simply perform a trivial mapping of adjacent VMAs expecting a merge, > however prior to recent changes implementing this mode earlier than before, > these merges would not have succeeded. > > Assert that we have fixed this! > > Signed-off-by: Lorenzo Stoakes > Reviewed-by: Chengming Zhou > Tested-by: Chengming Zhou > Reviewed-by: Liam R. Howlett Acked-by: Vlastimil Babka