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 50E36F94CDB for ; Wed, 22 Apr 2026 07:32:55 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 7A1196B0088; Wed, 22 Apr 2026 03:32:54 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 752316B008A; Wed, 22 Apr 2026 03:32:54 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6408F6B008C; Wed, 22 Apr 2026 03:32:54 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 521956B0088 for ; Wed, 22 Apr 2026 03:32:54 -0400 (EDT) Received: from smtpin12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 012BD13C24C for ; Wed, 22 Apr 2026 07:32:53 +0000 (UTC) X-FDA: 84685375068.12.55B66EF Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf15.hostedemail.com (Postfix) with ESMTP id 1B9EDA0004 for ; Wed, 22 Apr 2026 07:32:51 +0000 (UTC) Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=UWn5Lipx; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf15.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1776843172; a=rsa-sha256; cv=none; b=qUitN3w9xV8CNkof4HxwFWw2RDfzPmF9TlbJHnxKjJqLUQiuo/m7npffvX4DqmYKC9kh+6 xbWQtXF6Ymw2o3YqT24inyRwMwXjut3CZ2Uo79DHgf1cFAE2xutxJqKHB0N9Sdj81letFU hP4mVptNg/1O71QYfAMDpPadA/hU9E8= ARC-Authentication-Results: i=1; imf15.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=UWn5Lipx; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf15.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 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=1776843172; 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=SG3U5Kc9NnIbl1SNYavcCahtb0w4f/92raszKTt9OvQ=; b=LuWnpXiAwTLbRJ2JFNioeuq0KWlOp+++CnfOGkwuz5fG+GyEFF6DcS18V+/kcz+iuF4Wy9 aKS6kbbfCOKHO+280lCPdmBHYeyI09IYHNp0kt9lBs9AvIrBaavnjBtI2tRwQq3NQqmiu8 M877cJY1BYIwge8vxZxL0tpQdtZRIBQ= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 1BEF74401A; Wed, 22 Apr 2026 07:32:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DE5DFC19425; Wed, 22 Apr 2026 07:32:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776843171; bh=tmYp3b+r6xGGwWY4X9h42ZuE85+tMVe7ly8mid2UHH8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=UWn5Lipxf+Sc1LCZpRjv0NROKKlwHt4nvhn6Jbh3rpy+EjEImQpTWKcw4prS4+SfI /ShG9UPAJu6u1N7JAsS7Y3YjJERZ7bT/uFcp+5rA3pGXfO4+rBoiJvSl4OBsHNfINk OSOirgRW4F6GVQYKkNTxwZbhZzG3W8uR+wkBsJ2UR7KeGT34fe4Uncqg8+LTOXXuK0 iVzDTXC37AbkRlxsXuXQCRyQMCSSIEeUo74D43jkEY7rR+Q9oOrCvYO9j2ETn+i/gZ Y/i5NoODH8hLdiT6+2JEfX+Q1KV+I28bq3uh676yDdct4zQeyU3wGGmtI+hKX1aU+c Q7UDCrUTZn9lA== Message-ID: <51c8ef87-761e-4357-a99d-e5d60cf77ca1@kernel.org> Date: Wed, 22 Apr 2026 09:32:43 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] mm/page_alloc: fix initialization of tags of the huge zero folio with init_on_free To: linux-arm-kernel@lists.infradead.org Cc: Catalin Marinas , Will Deacon , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan , Lance Yang , Ryan Roberts , Mark Brown , Dev Jain , linux-kernel@vger.kernel.org, linux-mm@kvack.org, stable@vger.kernel.org References: <20260421-zerotags-v2-1-05cb1035482e@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: <20260421-zerotags-v2-1-05cb1035482e@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam10 X-Stat-Signature: 73m337h113ag1daz93n9j96izmju48n3 X-Rspam-User: X-Rspamd-Queue-Id: 1B9EDA0004 X-HE-Tag: 1776843171-27219 X-HE-Meta: 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 3SRTJUvF NYdj7YfkR+Ddkv2Ydk2jRxxEwjHcvS046J415O7TIZ2x45TFZ/eHllrEewVqMqiuqe033vppi30j5jcMMjlv+2xaztquhLvjYS7IIcljEAeOZa/TjIf2aebSn5VQqaspGrcRrahAATdR4alQ5RAH7SU4SWNkEhyhKxMplujkbdk3pKyEbh+e9lYJvRs1wBuG6vG1vPtUpFbpUo6xUjM5EBolKLTG4bGj4W4ts/5YkWtOEbotQQlL89I2etW+RutbLWNKMNCX+i8X4MFJkdLwE4m6iPY4U0vmm33AVqRtQtTCiqlOeTpTOcohJvQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > } > diff --git a/include/linux/gfp_types.h b/include/linux/gfp_types.h > index 6c75df30a281..d79049291b1a 100644 > --- a/include/linux/gfp_types.h > +++ b/include/linux/gfp_types.h > @@ -273,11 +273,11 @@ enum { > * > * %__GFP_ZERO returns a zeroed page on success. > * > - * %__GFP_ZEROTAGS zeroes memory tags at allocation time if the memory itself > - * is being zeroed (either via __GFP_ZERO or via init_on_alloc, provided that > - * __GFP_SKIP_ZERO is not set). This flag is intended for optimization: setting > - * memory tags at the same time as zeroing memory has minimal additional > - * performance impact. > + * %__GFP_ZEROTAGS zeroes memory tags at allocation time. Setting memory tags at > + * the same time as zeroing memory (e.g., with __GPF_ZERO) has minimal As pointed out by AI review s/__GPF_ZERO/__GFP_ZERO/. I assume this can be fixed up when applying. -- Cheers, David