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 BEDCAEC1106 for ; Mon, 23 Feb 2026 16:28:52 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id F35426B0088; Mon, 23 Feb 2026 11:28:51 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id F0D6C6B0089; Mon, 23 Feb 2026 11:28:51 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E2CFC6B008A; Mon, 23 Feb 2026 11:28:51 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id CFDBF6B0088 for ; Mon, 23 Feb 2026 11:28:51 -0500 (EST) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id 845C21A01ED for ; Mon, 23 Feb 2026 16:28:51 +0000 (UTC) X-FDA: 84476255262.10.FF3913B Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf26.hostedemail.com (Postfix) with ESMTP id A0FAC140004 for ; Mon, 23 Feb 2026 16:28:49 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=ofecjYvj; spf=pass (imf26.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=1771864129; 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=DSB+twJ8RQrq+fHV4d1Hxvqhv9VsSzrh8s/dkyStF/k=; b=txIemxoblbpk1O3yQhHzsYjsd9SPpBLQeEKqQ6rOrU4iwIV5mZXHOKAKfedB2TgIw7BJQ3 cJaD96XiGMV64X72ptPkaR1cGn7iw1Xb4hFdzFsJpkCgxTrZGYCNKiaMVBrhDott791Oic TVO8AbzmUnr2i4SoB8T8JbugmNKuDN4= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=ofecjYvj; spf=pass (imf26.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=1771864129; a=rsa-sha256; cv=none; b=8FQ+BDyERJdrnYHdU2fLE3YpqFoEgLXjuU5X/4r1uKcGuKPaLEWB/fNrMqt/Y+1WNUV8bw XTuZmASwHb/rljzNRJznR4IDZTWB2oZkzLx8nlVk9Jv3eTYfqMLnQ34N+86nAt9P51URqz DczYXY5yWIgU01zRiJOsc/sQD4M3plw= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id AE91A43708; Mon, 23 Feb 2026 16:28:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BFF94C116D0; Mon, 23 Feb 2026 16:28:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771864128; bh=dl4eqRFk/KrviE517x++cn1PZar9Tp8XEK8Khfk13J8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ofecjYvj20dCGmilmiV0LD/TRrNYIpF4QAIatXjGsQlCf6bxawsnZT4iLzxnyjcwb vPK4jm4v1nSB79/4C2tCu+RcNOWvkxrNXL1Tf0krqX/aLBf854IXa9c5CBDqhX+odn MJKXGuK+IB+by+V4P448oY2VabEbcviBV7rAkOtPYUN7GJAJcMj5Ir1PoKbLZ9x+uj QBlMnsc8VNOqUctFBiBmh1OWLptKyOfw5xukfKmFbUA73OgOoax2hsGeRh4aDFIcvz kx302ts42lzqGTu/SlFjQ1vIcowYoKANs+ztvM9mvEHXxsohO6aBy9ny+yq1MxRQNl FJPwAJ6L2FiJg== Message-ID: Date: Mon, 23 Feb 2026 17:28:41 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [LSF/MM/BPF TOPIC] Per-process page size To: Matthew Wilcox , Dev Jain Cc: Pedro Falcato , lsf-pc@lists.linux-foundation.org, ryan.roberts@arm.com, catalin.marinas@arm.com, will@kernel.org, ardb@kernel.org, hughd@google.com, baolin.wang@linux.alibaba.com, akpm@linux-foundation.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Jens Axboe References: <20260217145026.3880286-1-dev.jain@arm.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-Rspam-User: X-Rspamd-Queue-Id: A0FAC140004 X-Stat-Signature: wp9ygkwr8j4e5e8aw45faec1tzy9erb8 X-HE-Tag: 1771864129-914480 X-HE-Meta: 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 MsmPtP8G IcHEadQZMiYQBSae0KUWctR9Yk/3ow6Vi06IN+OJknd+B9A2jebpn7hc5a1kbQ4lylRF5wRycZu4cYifeGV/bVbEOabMHDv+dQ1skecVDDXrxad9KYRWYOYshym/xa4Xlv39ygX7N8jH/sCl87pyi9XYCEqAf/v0KTzbDc3M2TbPXraBhfupejeIFgCc5lhcoqONmJUIaWD0gZBbjQhsp0b8peijJX/rS0jPVGXRhKBL+uhycltZGU65T4xuu9PdB+MMC X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 2/23/26 16:18, Matthew Wilcox wrote: > On Mon, Feb 23, 2026 at 10:37:55AM +0530, Dev Jain wrote: >> I didn't understand the reclaimable reference, but yes we need to make this efficient. > > this goes over 80 columns so much and so often, it's painful to read. > so i didn't. I just found out that Thunderbird was lying to me the whole time. If you're using "Toggle Line Wrap" plugin you might think that mails are properly wrapped, you know, like *they are displayed*. And even lore displays them properly. But in the back, Thunderbird set "format=flowed" and screws you. So, if anyone else believes that they are sending properly wrapped mails with Thunderbird, read Documentation/process/email-clients.rst and make sure that "mailnews.send_plaintext_flowed" is set to false. Thanks Jens for the pointer! -- Cheers, David