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imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=b0q2M1Y1; spf=pass (imf25.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1770370986; a=rsa-sha256; cv=none; b=IWbJVuyMDs1T5UT6YRnKeBXNuududGUtGCYV5orDuHGjqbbmkCDsnx9P3zdoiihPBYBsj1 qCZEtOpD4DUWAHw3TteqmGy5sllXeQ1DZ0oDTDHInYj5uOFh8hCT/toUg8HlWCo5thB94I D6cogdKpoToqVjWspa10Xz5SxmTLGmI= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 4DDE2600AD; Fri, 6 Feb 2026 09:43:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4C084C116C6; Fri, 6 Feb 2026 09:43:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770370986; bh=opKNMeKc5dUGPWp6AFdxTH7O+3QX2spoWarAppjxqc0=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=b0q2M1Y1+zFPHhE8ZfPQRp3VzxIogdG5i7e6pVAmwCnkqZPgiOkhMl2qkj3kC5NEg Axto48z8EEp6E+zuf9FLH4pnYtMWe46vAG4eYCOmfS+gE2nvNHhyCacw8WicO7aJFN iSH/EqOPEgf+At3uRYkyWNwfZZNKNh9bPQUVdLdW5QDEojnAfrnUJA5DKNufmuLMHd GH6RBqlMqSwoEKrcIyfmIS5x0Z1ZkDgRhnPL6MfhgJfpbvx6UJz2WqOfW7JACfIbgF GN1R89A+idESDTjIRjGwz1hS/d6rNe5iGfc9RKewY6R+4qqVJj4clFyq6YJNw8/AQA KIT3r+LwgJSTw== Message-ID: <33e5e080-6e07-4cc0-88da-0cb55c9d0ae2@kernel.org> Date: Fri, 6 Feb 2026 10:42:59 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCHv6 14/17] mm/hugetlb: Remove hugetlb_optimize_vmemmap_key static key To: Kiryl Shutsemau , Andrew Morton , Muchun Song , Matthew Wilcox , Usama Arif , Frank van der Linden Cc: Oscar Salvador , Mike Rapoport , Vlastimil Babka , Lorenzo Stoakes , Zi Yan , Baoquan He , Michal Hocko , Johannes Weiner , Jonathan Corbet , Huacai Chen , WANG Xuerui , Palmer Dabbelt , Paul Walmsley , Albert Ou , Alexandre Ghiti , kernel-team@meta.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org References: <20260202155634.650837-1-kas@kernel.org> <20260202155634.650837-15-kas@kernel.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20260202155634.650837-15-kas@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: D9549A000F X-Stat-Signature: b6j834fbezaw7smmfds3hdht18ip3u49 X-Rspam-User: X-HE-Tag: 1770370986-667295 X-HE-Meta: U2FsdGVkX19Mv33pgeJNEdE48PaTxvVgI8ld97adkC1Y/nCD2FayKJU2J41VJbQ+qh7BWl/aXuipO+ouDHCvRwrcjVjNtKVaR1ZHbXD+CEABgLNa9lVaXD7dNiVFhkCZHpm+vqfUGHU75i5O3XiMssRd8FkmNEDPvgLKFqZutLrU0vLZpG/L/BV7nhBK8F6AOqZ8rIKxXih9AASSstEryLMEep0uIby/xvhD3BEMd/pOFb4FwDFtVHlEh51m+iY/bj0s9pylCbc1vap8/nsXaq/Cx5uSZzVUJVP0iNr5SdfzK3JM1SPdGgZ+H3s/cJUst3H6xUZJ3J2HnqbWkrcrvoIoa4CsyUQlwuJewPdG3SYR+R0/USXN8jxsNTKNGf3a1eX/n14WE7RSigVhhNGznpl0+CFwxnhml27emD2B14q/NjbMqvjpErLurop5+TiXsy/a3aGS6E1cfaDVkrZQVKgi02M5Q2kw3hfgBkyF7tpOPdyrPYCN2MHsxwkPtsdd14oG/DZIhGGmvMYeUDXcpVfxX+ZeE4RUgGEVg53M98MQDqDEJjm2I5ovS85roN/KY/cgmrY4YnZSl9bVa1pBYeMsrn4bZapES1N4z++W8oMLtkUDNmW26J+iYwh3ERWa5ZWTL0bYwO0swsMWvJ3TWlGxomWW29qwIK/JVwgrt/VeZDCoG1FvHc8Kua1l3LhdmgJmY+BHB3JbKu9euVfwBBEovE/jCIqldVhqIqMR4NbdXZ79wVCFuavLm3JAlNNWbpgMz2XyrMGBI28IwKhhJ3KKhpyzpzMeGnjb8KsyG7IGswGxiRkii5+skk7iqZjyLtWD41BYUkYSgczSaPxIpQ1vowXx9OUeEZg+SwfIU57qMwBymrRLSqTwGcFP54mcKQ8S7BidE9P7nzTyfyXTidxAgic1azGF8fa/xbRcYflxa1z5BJzCY5YqjOatUXQy7UwycRpi+hbKPm0gdnJ NXB8W1X8 tn1xQ+DsUpyH8oDO6OnUvNFCFT28lTLO5HLQOukligEbS55n4YHk45aFHUHvr0Z5qpULftPN4DVmcLfnoUuwinApv+bjdCf2TyElCa6meOo7dVnvkJxnKQIwpF54aUGB8gJ48Klv7AgG4XPA61Qb0+sm/hqQzKOny6CYEj/KDIWwxPS7wSIh/g6i4UCCz2DEO5fqSRuG59g5Hc/GGrwTKSSDAVWJkWqoVRw5f1+k8WJ8Y3Ys8rktVihEI/TubVguw+Ky2Cs8ssvaBnnEa6qf7zFmVHr56JGBgxELV+EBEbfpm08xpinbiWKgDL71Kw3UJemFBcIketazy0Sc= 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 2/2/26 16:56, Kiryl Shutsemau wrote: > The hugetlb_optimize_vmemmap_key static key was used to guard fake head > detection in compound_head() and related functions. It allowed skipping > the fake head checks entirely when HVO was not in use. > > With fake heads eliminated and the detection code removed, the static > key serves no purpose. Remove its definition and all increment/decrement > calls. > > Signed-off-by: Kiryl Shutsemau > Reviewed-by: Muchun Song Acked-by: David Hildenbrand (Arm) -- Cheers, David