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Fri, 9 Aug 2024 15:09:14 +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 YIBFMxoxtmZNHwAAD6G6ig (envelope-from ); Fri, 09 Aug 2024 15:09:14 +0000 Message-ID: Date: Fri, 9 Aug 2024 17:09:14 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH] vm: align vma allocation and move the lock back into the struct Content-Language: en-US To: Suren Baghdasaryan , Mateusz Guzik Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Liam.Howlett@oracle.com, lstoakes@gmail.com, pedro.falcato@gmail.com References: <20240808185949.1094891-1-mjguzik@gmail.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+fMgqZkBQJkBREIBQkRadznAAoJECJPp+fMgqZkNxIQ ALZRqwdUGzqL2aeSavbum/VF/+td+nZfuH0xeWiO2w8mG0+nPd5j9ujYeHcUP1edE7uQrjOC Gs9sm8+W1xYnbClMJTsXiAV88D2btFUdU1mCXURAL9wWZ8Jsmz5ZH2V6AUszvNezsS/VIT87 AmTtj31TLDGwdxaZTSYLwAOOOtyqafOEq+gJB30RxTRE3h3G1zpO7OM9K6ysLdAlwAGYWgJJ V4JqGsQ/lyEtxxFpUCjb5Pztp7cQxhlkil0oBYHkudiG8j1U3DG8iC6rnB4yJaLphKx57NuQ PIY0Bccg+r9gIQ4XeSK2PQhdXdy3UWBr913ZQ9AI2usid3s5vabo4iBvpJNFLgUmxFnr73SJ KsRh/2OBsg1XXF/wRQGBO9vRuJUAbnaIVcmGOUogdBVS9Sun/Sy4GNA++KtFZK95U7J417/J Hub2xV6Ehc7UGW6fIvIQmzJ3zaTEfuriU1P8ayfddrAgZb25JnOW7L1zdYL8rXiezOyYZ8Fm ZyXjzWdO0RpxcUEp6GsJr11Bc4F3aae9OZtwtLL/jxc7y6pUugB00PodgnQ6CMcfR/HjXlae h2VS3zl9+tQWHu6s1R58t5BuMS2FNA58wU/IazImc/ZQA+slDBfhRDGYlExjg19UXWe/gMcl De3P1kxYPgZdGE2eZpRLIbt+rYnqQKy8UxlszsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZAUSmwUJDK5EZgAKCRAiT6fnzIKmZOJGEACOKABgo9wJXsbWhGWYO7mD 8R8mUyJHqbvaz+yTLnvRwfe/VwafFfDMx5GYVYzMY9TWpA8psFTKTUIIQmx2scYsRBUwm5VI EurRWKqENcDRjyo+ol59j0FViYysjQQeobXBDDE31t5SBg++veI6tXfpco/UiKEsDswL1WAr tEAZaruo7254TyH+gydURl2wJuzo/aZ7Y7PpqaODbYv727Dvm5eX64HCyyAH0s6sOCyGF5/p eIhrOn24oBf67KtdAN3H9JoFNUVTYJc1VJU3R1JtVdgwEdr+NEciEfYl0O19VpLE/PZxP4wX PWnhf5WjdoNI1Xec+RcJ5p/pSel0jnvBX8L2cmniYnmI883NhtGZsEWj++wyKiS4NranDFlA HdDM3b4lUth1pTtABKQ1YuTvehj7EfoWD3bv9kuGZGPrAeFNiHPdOT7DaXKeHpW9homgtBxj 8aX/UkSvEGJKUEbFL9cVa5tzyialGkSiZJNkWgeHe+jEcfRT6pJZOJidSCdzvJpbdJmm+eED w9XOLH1IIWh7RURU7G1iOfEfmImFeC3cbbS73LQEFGe1urxvIH5K/7vX+FkNcr9ujwWuPE9b 1C2o4i/yZPLXIVy387EjA6GZMqvQUFuSTs/GeBcv0NjIQi8867H3uLjz+mQy63fAitsDwLmR EP+ylKVEKb0Q2A== In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Stat-Signature: ymc4hjd7bybmhawzifsis41horf4hnsu X-Rspamd-Queue-Id: 9854840018 X-Rspamd-Server: rspam11 X-HE-Tag: 1723216156-550072 X-HE-Meta: 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 uh11NE6t 2fUk47AXU8i9jvwOq3j8jcf2LXh8HDZRPbLXwo+/SeDNIawz3fzGpmnUfkR4SwSX0ZC8LG+6QPXED17vg8jk2hGlBAy9cQLXwaAiwBXrJ9AV5OcUMEdIfXX+DMeuYZxpAk/HhIs5T+ZaV7DKwaHyew+NccEuHbl5N2Af9UyD/127x7vRQdRvaoCAVGCEqbpLYKzj4ts6yiFQx9H36Do/Eerh6BneuvFmwpqS8aiNqzIPBtkSS/3r+ot59gv2TMAtMZCcs+kO04sz9FN3GPMePRRmGHX2/KtozcviQq0oWu10WKFUjXL5bTipHOtdX6Y5LUKA25iRQEGGeNQQ= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000438, 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 8/9/24 05:57, Suren Baghdasaryan wrote: > Maybe it has something to do with NUMA? The system I'm running has 2 NUMA nodes: I kinda doubt the NUMA aspect. Whether you allocate a vma that embeds a lock, or a vma and immediately the separate lock, it's unlikely they would end up on different nodes so from the NUMA perspective I don't see a difference. And if they ended up on separate nodes, it would more likely be worse for the case of separate locks, not better.