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imf28.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=nNwzPSZO; spf=pass (imf28.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 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=1779484580; a=rsa-sha256; cv=none; b=Nrq11AwVsDCpKKHrQT+MfvMk+Mutll0am3f4qtIBs3a1bnjn0jAV5A5hXo3SlPhzC7aq+s 1KVUA1qQX0CuCkLrvW9PPQeuG9L+z7tpPBdUPZcKKBlB1gowlPTqhT9RHf3ZauAoOnl9Fq IzVxfvm1/FIIsa3uebQwctwQxUod/eo= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 87A9740B49; Fri, 22 May 2026 21:16:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 495371F000E9; Fri, 22 May 2026 21:16:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779484579; bh=tGmWZbG2XGjAGwpaog1iRNN4n31HKv4MBqTgH3eSn90=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=nNwzPSZO0ZEHyiAgw1qN6z/KxhNwy1BnxwrzxfF8GndiwcyyMdaCY7X5j2j5LaUFr G4mnI05/cCDFJiSr3ohFweFxCMAqT1/Sr3dWxKvh7WtB8uu+PHmsa+HaLZqJ1RuLGB YVzdC29OzzaPwCvyalyJNimn0BpZ9tbCAlDt/D+J6czOdZcvA+5feY/Ir603AcWDX/ EqvZN4LVid2f38MiJSe36TPmXRyJulrZcWynCXZjhnZ0/+FEyhtffNgG5HaY3IKmGs 9+7+hTgeuJDZX9ZCdi6abfB+XMebg6A9RgpDtVNy5oQsnvENBtYj7zGbUOB5bIXWm+ fRJIkUqBUP8Zw== Message-ID: Date: Fri, 22 May 2026 23:16:01 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH mm-unstable v18 03/14] mm/khugepaged: rework max_ptes_* handling with helper functions To: Nico Pache , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org Cc: aarcange@redhat.com, akpm@linux-foundation.org, anshuman.khandual@arm.com, apopple@nvidia.com, baohua@kernel.org, baolin.wang@linux.alibaba.com, byungchul@sk.com, catalin.marinas@arm.com, cl@gentwo.org, corbet@lwn.net, dave.hansen@linux.intel.com, dev.jain@arm.com, gourry@gourry.net, hannes@cmpxchg.org, hughd@google.com, jack@suse.cz, jackmanb@google.com, jannh@google.com, jglisse@google.com, joshua.hahnjy@gmail.com, kas@kernel.org, lance.yang@linux.dev, liam@infradead.org, ljs@kernel.org, mathieu.desnoyers@efficios.com, matthew.brost@intel.com, mhiramat@kernel.org, mhocko@suse.com, peterx@redhat.com, pfalcato@suse.de, rakie.kim@sk.com, raquini@redhat.com, rdunlap@infradead.org, richard.weiyang@gmail.com, rientjes@google.com, rostedt@goodmis.org, rppt@kernel.org, ryan.roberts@arm.com, shivankg@amd.com, sunnanyong@huawei.com, surenb@google.com, thomas.hellstrom@linux.intel.com, tiwai@suse.de, usamaarif642@gmail.com, vbabka@suse.cz, vishal.moola@gmail.com, wangkefeng.wang@huawei.com, will@kernel.org, willy@infradead.org, yang@os.amperecomputing.com, ying.huang@linux.alibaba.com, ziy@nvidia.com, zokeefe@google.com, Usama Arif References: <20260522150009.121603-1-npache@redhat.com> <20260522150009.121603-4-npache@redhat.com> 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: <20260522150009.121603-4-npache@redhat.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Stat-Signature: 7ye5qu3gzssx9tuthj5regs53pztrzxt X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: B5A8FC0005 X-HE-Tag: 1779484580-62756 X-HE-Meta: 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 GbpZBd/A kFYnlKu9/6RsEXyQk7rGMzuc0na2IQOb+++99W8wTI/lfItuNNAknVhfPdDx9T3u5xwvMRuU38K4gjLDgKq2dTpjx2YR0tn22oGjbaenr3N6ZORbX8HqMDzmdId7EjnNOJ3WFPlOLP9ito4AiXmOa7559mMcX/pROWBGMzX5D0AObb06AHXei0sqK8Z/7qV9NevpAWNbZrCdS3/svqgz4YkShgaAipW8KbXqJXAUL3N649NUB6iUZ4dTDOJ71f1Bz8Z830vFupm/7eoSxo8QA27OnrjBu1gsNtS0ekIUgci7p14ELJBUsoYnG+V1+hVZSDJlp8XVMAZxWno1KsqCtiXYWnWy/F5Fj8cvvYgWwtYj1ejyd5fElT2ClaQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > int hugepage_madvise(struct vm_area_struct *vma, > vm_flags_t *vm_flags, int advice) > { > @@ -540,6 +598,8 @@ static enum scan_result __collapse_huge_page_isolate(struct vm_area_struct *vma, > unsigned long start_addr, pte_t *pte, struct collapse_control *cc, > struct list_head *compound_pagelist) > { > + const unsigned int max_ptes_none = collapse_max_ptes_none(cc, vma); > + const unsigned int max_ptes_shared = collapse_max_ptes_shared(cc); Yeah, it's good that these are all const now. -- Cheers, David