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 7C6E9ED7BBE for ; Tue, 14 Apr 2026 11:03:53 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E9A286B0088; Tue, 14 Apr 2026 07:03:52 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E23EB6B008A; Tue, 14 Apr 2026 07:03:52 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D12F96B0092; Tue, 14 Apr 2026 07:03:52 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id C0E496B0088 for ; Tue, 14 Apr 2026 07:03:52 -0400 (EDT) Received: from smtpin14.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 7064816056F for ; Tue, 14 Apr 2026 11:03:52 +0000 (UTC) X-FDA: 84656876304.14.6A075B3 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf14.hostedemail.com (Postfix) with ESMTP id 903C510000C for ; Tue, 14 Apr 2026 11:03:50 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b="G5Y/8fD8"; spf=pass (imf14.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=1776164630; 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=Jgyc/BJGxRwJ6A71YcyER0JDzVxGbts5eocxffYmMGg=; b=l1ZVEZLXqu2hANh+g8Kxj+yJZUl88zV1Du7lejhz5LzfW0nN0wEmpEaPSO6uFk5DdaJwsh E+B0C10SSlcHkCQLuvKlbMmo58T/125X9cerJLJt3fjC69jWHGErJ4dTOlRWn40EjZNk1k yHmiPXJS/xI3LNOvDJYrPVmY/jNRKGI= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b="G5Y/8fD8"; spf=pass (imf14.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=1776164630; a=rsa-sha256; cv=none; b=wFkou9CDrEu7cYxlOCd5oelHLrTTPoZbpgKsY8ZqGinXR1miu06PC0xOBZgz/s5cCUt6U+ UHHfZttet6Ht1P9jhdnAPLlYKbU+XJ44XnDWTFly9fm1sEyTKtttNIiJUeYC1PWeTYICup ZXpgSW0V1Aa9IIKfgdKf1AkBFvpf1wM= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 9991F4321A; Tue, 14 Apr 2026 11:03:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3EB2CC19425; Tue, 14 Apr 2026 11:03:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776164629; bh=SrWPhnGntZWEhwfx7DzHlkqjUcIXkV1FnkHFmTuU8zc=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=G5Y/8fD8Y3ySpBce9Z9booc3YvxmpqO/2krLoBKNrMw8NezaR0DalOybg3Fub+6Rg yf5qTn7uuQYd7kQVmq9OD1vnheXF/UV9wYDl1BeKjpdZN18nM/dPz/Kml6AHNRwQsH keO3WJV6TtEghMhlv2r/lar6jqRWUYn4shDs9CG5I8oRWFYBgRTBw9IMaCFbSWjMS2 Ddv4lr3Q3Q0OBSiEolfYw/m6FWEY7MRykTgHOKR/dB/hUJtNVJ3THauISF1GHPFpUx CXRAmoL4GrGQCFpsofvy6Px4HN37VscAX7eeiUog0y/oGcbjyiG6RW3y8c/EGHCgwb bucy8JBds9K3Q== Message-ID: <5a3aab32-e96a-4cf7-86f1-7991d924bcdf@kernel.org> Date: Tue, 14 Apr 2026 13:03:39 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 7.2 v2 08/12] mm/huge_memory: remove folio split check for READ_ONLY_THP_FOR_FS To: Zi Yan , Matthew Wilcox Cc: Song Liu , Chris Mason , David Sterba , Alexander Viro , Christian Brauner , Jan Kara , Andrew Morton , Lorenzo Stoakes , Baolin Wang , "Liam R. Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Shuah Khan , linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org References: <20260413192030.3275825-1-ziy@nvidia.com> <20260413192030.3275825-9-ziy@nvidia.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-Rspam-User: X-Rspamd-Queue-Id: 903C510000C X-Stat-Signature: 19xjts63hs687rgmg9rg6fzdnshay3to X-Rspamd-Server: rspam06 X-HE-Tag: 1776164630-591692 X-HE-Meta: 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 5aeo1XHE 0bHgmO2k3VvqDmUe/6V5TYPyyN5fw2vfbi0ETgraofvu5vw+/wcXkvV/BKlgLlNfmHkg3D97KknlC8UBKnh82hhB94qWI220u3baGQK7B4OWLuwe3C0FZ/5CQDf23TsfRP9O/lvNBVt6DoPxYfvZRdAEtgImGNhtM6O74+qQn8g5gTjYEUQVPVzxggCUN0eNkPg5nkjB27YOcJYNRa6TUOx72IvWO7NDKzDOYkFTsvcjNWEitJVKdrmuik+FeSbd93NjKiVAeSex5zllgnAvXkvFiY0NE27klETUCdPjFAlGGFUV4kAl+jrGJBNlRFrxrDtmqLwfHRRk/b/Q= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 4/13/26 22:46, Zi Yan wrote: > On 13 Apr 2026, at 16:41, Matthew Wilcox wrote: > >> On Mon, Apr 13, 2026 at 03:20:26PM -0400, Zi Yan wrote: >>> + /* order-1 is not supported for anonymous THP. */ >> >> It's also not supported for file folios, right? Or do we just skip >> adding order-1 file folios to the deferred split list? Either way, > > order <= 1 folios are not added to deferred split list. See > deferred_split_folio(). > > IIUC, we have order-1 file folios but not order-1 anon folios. And only anon folios are ever added to the deferred split list. Acked-by: David Hildenbrand (Arm) -- Cheers, David