From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5E2B4C79FAD for ; Wed, 9 Sep 2026 12:48:57 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 4FADA6B0095; Wed, 9 Sep 2026 08:48:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4D3546B0096; Wed, 9 Sep 2026 08:48:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3C2C46B0098; Wed, 9 Sep 2026 08:48:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 1004A6B0095 for ; Wed, 9 Sep 2026 08:48:56 -0400 (EDT) Received: from smtpin25.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 9ECE1401C5 for ; Wed, 9 Sep 2026 12:48:54 +0000 (UTC) X-FDA: 85194203388.25.90B0A12 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf06.hostedemail.com (Postfix) with ESMTP id CE9C0180007 for ; Wed, 9 Sep 2026 12:48:52 +0000 (UTC) Authentication-Results: imf06.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=NVevUqrf; spf=pass (imf06.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-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1788958132; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=WiiAwtPF6Pku3MR8Pkjyi8U+d6UdSbkK4PO/kbMV8OQ=; b=UFEOh7bWwfA0svptL5fZd5Rcyeakh4+BnU3DSp5H8Bm8gjHV1vL2ljGHxUkC+YDLogqZdO Ydam75aYCzx4hksBmFTzomaYlgFmTNilVMOMeQOOkzE8VktvaHUFgEiArJ9cjxwrNxIjGv 9ro21C8d4wOeTR5lZrZbtT0I8CaFdWs= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1788958132; b=XauhQF/GMDoNDVDt75uAjghE+Gs/0bEO0rR6gduuxGgQ2DioD9OGhPfFqt4Ix8qNpN7nWS EWCuM6zPN+fsyZcE+cRo68PpZovv5naHABwVc5vZgWhocz193NfaUkj3pV39VizVS72eRk rWSYIA07+iPLZzfQ6umNulKyq30L7UA= ARC-Authentication-Results: i=1; imf06.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=NVevUqrf; spf=pass (imf06.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 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id EF00843D34; Wed, 9 Sep 2026 12:48:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C6AD11F00A3A; Wed, 9 Sep 2026 12:48:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788958131; bh=WiiAwtPF6Pku3MR8Pkjyi8U+d6UdSbkK4PO/kbMV8OQ=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=NVevUqrfuep5jObjd5o/zvYSPczEA7v7+UvplrdxdXCtSfnFwpi4z1WPkFyaLIWY0 eDC4IcRjsOMO+wWGoMwArnhEAuCe6WwQdH3uukrUDOoIZGgK9+tLoFoQjdedi54r0q No6g/T9QZvdUGbrcdaLmX/UNnyOZN/qPHv8JMNuMODiVI3D5UYQkCc8l3oPIXN85eA O1P8QhR/jP1MQxFUX2h0VY2WEEmJVGBs0hsaDbTPPPTZ5AHfMMNCz7dawF4ClEuXr8 A1YjORvfwzsnm+wkP6jJ/Pg3PFf4SePyCVT3V/3C3HpZAMmEJOPsixBxbO2AWrQw5Q Iu3VRVH3VjZ5g== Message-ID: Date: Wed, 9 Sep 2026 14:48:45 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 09/17] mm/sparse: initialize memory sections earlier To: Muchun Song Cc: Muchun Song , Andrew Morton , Oscar Salvador , Mike Rapoport , Vlastimil Babka , Lorenzo Stoakes , Michal Hocko , David Laight , "Liam R . Howlett" , Suren Baghdasaryan , Qi Zheng , linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20260825084608.47437-1-songmuchun@bytedance.com> <20260825084608.47437-10-songmuchun@bytedance.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: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: CE9C0180007 X-Stat-Signature: hojswa7en6udgpsi5nd8hhxqqp5xbugc X-Rspam-User: X-HE-Tag: 1788958132-65487 X-HE-Meta: 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 jhJN+GoF FLPvyv/GcVpE2ofRGDuRdbWWhuiWA1kpkjKjs7Nmj7wklF1ZSUh7HqZphxWUD8mAvNQFr3OdyLUkh7UrkZoAVBRqHSYlcTuVEcTSHXqFo+OXezwLm6g9NfYH4GlbYBOHc+7JplwMh7tniB0H7UNpb+uFvRYelq1eS2ZyuyBsq8OSdcIztutWd4O37fmTfysETUWBM7fQ3IWNdSCOoD7/UjQ/UdqQ/cLGlCG7kqppjOl9P3VFDserOSOia8DgEPMiAjtGI2L3rODGmPG1mYIDkCtH7YN2Xp0jhv2qISPLHRRKeoz9oEeIr+VOdACOzjRhxjxtAjCzE0MhWJWVbLK9afgid5A== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > >> >> I have patches to get rid of __section_mark_present() and just set them all to >> SECTION_IS_EARLY|SECTION_IS_ONLINE such that we can just iterate early sections >> and get rid of that PRESENT monstrosity. >> >> Apart from that LGTM, even though I don't particularly enjoy splitting us now >> having two init entry points >> >> sparse_init > > Maybe this one should be sparse_memmap_init? If yes, it could be another separate > cleanup patch. It does way more than that. In my patches I factor some of sparse_init out and call it sparse_metadata_init() -- memmap and usemap. -- Cheers, David