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 F22EBCD4F26 for ; Tue, 12 May 2026 07:47:43 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 657C26B0096; Tue, 12 May 2026 03:47:43 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 609196B0098; Tue, 12 May 2026 03:47:43 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4F8006B0099; Tue, 12 May 2026 03:47:43 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 3B28A6B0096 for ; Tue, 12 May 2026 03:47:43 -0400 (EDT) Received: from smtpin04.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay04.hostedemail.com (Postfix) with ESMTP id D82551A03CC for ; Tue, 12 May 2026 07:47:42 +0000 (UTC) X-FDA: 84757988364.04.7982204 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf12.hostedemail.com (Postfix) with ESMTP id 2F06240004 for ; Tue, 12 May 2026 07:47:41 +0000 (UTC) Authentication-Results: imf12.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=KfH8aFKm; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf12.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1778572061; a=rsa-sha256; cv=none; b=1y/bqBnyvylT1QDiwLpBt+BKQe+oqpU/B2PgqdnAKwreY9s6BxEPA+et11mkHiyhceIUcq OBXfwI8HxpkivGZ+tVobdEELfWH62VlDXL1vEcpzMkS3IMTJe7SxYGyXQHMh1VqKnTPJzu A4vOdZzUzlc37sXMjJ1nBch8/Zu7JW0= ARC-Authentication-Results: i=1; imf12.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=KfH8aFKm; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf12.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1778572061; 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=0ntK6tjYBwRe/++/oh1AWSHRhzJGu/i+Tgo4xSvW+lU=; b=ggDW1eeADMjSEEngXh4490E5J7Em1MCsHYlnyJVkTPNW13zz0QGzYRBJGqrXnQ7GhGGxW8 I/EkM8AqMHfb9SeMeA1FujK7RB7sNmY7Jqyd+PueV53GN+63uWv86057yCQnwrq+hu2hwC jX8P3RNID1hd1MDOOePYmY+77Sm2w6o= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 995BA60055; Tue, 12 May 2026 07:47:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EAD3FC2BCB8; Tue, 12 May 2026 07:47:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778572060; bh=SqZ7JuR9aZYiSNIjFrM9/Owp7pj1r/N+r9S6ZbflLLs=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=KfH8aFKm9U4WSzucyrLYsh/QmdVCSVlPGKBRnnS5gmbsYLlAGMaD5dfTgD3OJJtxQ SrIzwEEBr+JLyyxd6cSDlD+Yb/V6jguPm4vjh3hNlVrJERzxAZecZwXlFgBhjqUJCP fq2iNIHqnKcOTKN5VVQRmdEg4FtJq83TkTTMR6iIq+GGGmP9JtcM/S47L81kQd4O+c FrJe0I5Pk7GS7XZzb+SW1CGEpirOjbkeUCe5Z9qpO4HgSMGVCfKdLtdgax9fMGnFJV DoJD8cUmo93tkso5BAxtd/wJxsVLSkUS/0pnLKkpOqh/VP6Y4F0c6r0o++ZwL6ExyH HHTZm8Epupc7w== Message-ID: Date: Tue, 12 May 2026 09:47:34 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 5/8] mm/bootmem_info: stop marking the pgdat as NODE_INFO To: Michal Hocko Cc: "David S. Miller" , Andreas Larsson , Mike Rapoport , Andrew Morton , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Suren Baghdasaryan , sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org References: <20260511-bootmem_info_prep-v1-0-3fb0be6fc688@kernel.org> <20260511-bootmem_info_prep-v1-5-3fb0be6fc688@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: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Stat-Signature: wt5j13z96muxarnh61sfaqwxkuwzdt4x X-Rspam-User: X-Rspamd-Queue-Id: 2F06240004 X-Rspamd-Server: rspam07 X-HE-Tag: 1778572061-142627 X-HE-Meta: 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 DiAhUK9a 2Lei/Z4jRsPImtvzTeGZwd3spM2z2Mr5z3s7gq4frejDYGlqapTkuHanhnOY6TKYNLEjQ0p3ARIZzs3LVfIf3ru7zkubakl6NSU+qXV292l+zLgHZak2nEuILnY/4sLh9EJ3A94X02t+35SA64MQkYFAhA17+ibraLsAmMYEZhAk8v+ofURBXUxToFs4cPOkJXU6jyGAYmBTlG4yr1ztb3ZfBf2nhP6rLxMnXw0krx5ndQ3sVVDQhv1pxWUWxSneis0DoOXzu/S8PEIH67Xl4MYmVuiZCwUlM208EjqdJ9FAiG1wNXWXeIJgWPA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 5/12/26 09:45, Michal Hocko wrote: > On Mon 11-05-26 16:05:33, David Hildenbrand wrote: >> We removed the last user of NODE_INFO in commit 119c31caa59e ("mm/sparse: >> remove !CONFIG_SPARSEMEM_VMEMMAP leftovers for CONFIG_MEMORY_HOTPLUG"). >> >> But it really was never used it besides for safety-checks ever since it was >> introduced in commit 04753278769f ("memory hotplug: register section/node >> id to free"), where we had the comment: >> >> 5) The node information like pgdat has similar issues. But, this >> will be able to be solved too by this. >> (Not implemented yet, but, remembering node id in the pages.) >> >> Of course, that never happened, and we are not planning on freeing the >> node data (pgdat/pglist_data), during memory hotunplug. >> >> So let's just stop marking the pgdat as NODE_INFO. > > With the last user, shouldn't we simply drop NODE_INFO? I'll drop the whole thing in part 2. I actually had both parts together until I stumbled into the vmmemmap x86 freeing issue that now causes conflicts until upstream and synced to the MM tree. -- Cheers, David