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 89C7EC79FB9 for ; Thu, 10 Sep 2026 11:08:04 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 384DE6B009F; Thu, 10 Sep 2026 07:08:03 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 35AF16B00A1; Thu, 10 Sep 2026 07:08:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 271736B00A4; Thu, 10 Sep 2026 07:08:03 -0400 (EDT) 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 E78956B009F for ; Thu, 10 Sep 2026 07:08:02 -0400 (EDT) Received: from smtpin14.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 3DC341C1E42 for ; Thu, 10 Sep 2026 11:08:02 +0000 (UTC) X-FDA: 85197578004.14.56E808C Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf26.hostedemail.com (Postfix) with ESMTP id 7BFD9140007 for ; Thu, 10 Sep 2026 11:08:00 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=UfY+BBiU; spf=pass (imf26.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 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=1789038480; 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=pCce3z8dCVOONWkuUk8CK4oY+wdLNQBPcWJtewhDSRE=; b=n7SeO+VW5E5JEEMcgFgUw6V6taBQ2L2eE79smTmtNdAk+XoI1a2ken+C9TvpKc+DSsE9rr HER+k5rU2WCX7x31Tqtqx/dTYryHNc2Gl47tgpPErOo1GTalNyuo/S7ZJduzEyZEXu0lUz Lzl8Tk+jrrGRj+AtpeKrfx0nVlnmYh4= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1789038480; b=MmGHYHq6slCBkgKjHgPfdkS1tdjrhb/UJcJK/ga1tCKikohMZgTIphFgi0bBcjIzXEtfMH Y1eTykWvZdgcG6ouq/sOKCm59YI+L6trTrFTN5K/FXZ3aBEFqhwX+Gt7IIZ2YJJVnzmV/U wzK7kPVBUf1VWYXWQaRjOy7CY+b+aC4= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=UfY+BBiU; spf=pass (imf26.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 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 tor.source.kernel.org (Postfix) with ESMTP id EB9FB600C8; Thu, 10 Sep 2026 11:07:59 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6AB01F000FF; Thu, 10 Sep 2026 11:07:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789038479; bh=pCce3z8dCVOONWkuUk8CK4oY+wdLNQBPcWJtewhDSRE=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=UfY+BBiU3GmNgRgmnmlEVQehpWmEe6l86q3IxlwNWdQOeajZTek9GZluUhB+HWPpl ZUMpUSW4rTr6yoabrHmMs71qKbsBXqcJWBE7a0xczru8ePO5yh+L3rzSheSHvNPqEW 5jc21Yg2bOquawBDYkm2pXvYjuB/fLxQFnAA9Tlis1zCXUW5VaQzOH/bXisEQMdeGo 0eqTHhaNNVQgs2/X7Krzkzc18IAblcwPYjYpiQA62vH+OP0H7lRaN408h2QTybMQ78 yoWNU+D7kzbTs08abGRCeZbCDNqXI7WXPYPJeOyz2c4hkikZnOCWGCkWydxGtAFrOg QcND5/OLUro9g== Message-ID: <4f90d69e-e1a5-40ee-a3ef-38e38c1efb8a@kernel.org> Date: Thu, 10 Sep 2026 13:07:43 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC v3 15/21] x86: mm: skip collapse_pud_page() when CONFIG_X86_DIRECT_GBPAGES disabled To: Yeoreum Yun , Russell King , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , Catalin Marinas , Will Deacon , Arnd Bergmann , Andrew Morton , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Johannes Weiner , Michal Hocko , Lorenzo Stoakes , Tianrui Zhao , Bibo Mao , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonas Bonn , Stefan Kristiansson , Stafford Horne Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-openrisc@vger.kernel.org References: <20260902-dummy_ptxp3-v3-0-5d8f5b17c25c@arm.com> <20260902-dummy_ptxp3-v3-15-5d8f5b17c25c@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: <20260902-dummy_ptxp3-v3-15-5d8f5b17c25c@arm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam04 X-Rspam-User: X-Stat-Signature: hc86d8emu8nwca4ytgq693gxkin85r4x X-Rspamd-Queue-Id: 7BFD9140007 X-HE-Tag: 1789038480-202526 X-HE-Meta: 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 1mYONjA7 dcdEeNB84eByWKzEENa3iXG54ZFbc75kxKZTQL+1ghRjfZ1KiQ6mwtAdcoZNSdSgIweSD1+egSyjxZZbhx+jPrXD9icJWHz778H4D1vtT0o3YXx6G8Hi4juaic4fccN20SEH+cWsNm3IDmiJZHw/EDeTzTZdmwPQi14VWozYXu/XeEtR/PPqe6Fsmv7QlgeHrl7plj5PmbHso5s1JD2g056M3L3V/PnQqYnNKkuAuH3dymj5+PrFs5FMRxI9MSsdGwItkn0XDdiFD0GtPO91K5U6YDLY7phn5rAEx88RN25bfDl6tlniTT7a7iw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/2/26 13:56, Yeoreum Yun wrote: > The behaviour of pXd_page() will change with generic compile-time folded > page tables by disallowing its use and triggering a compile-time error > when it's used improperly, ensuring that the actual pXd_page() is used > instead. > > To prepare fot that, skip collapse_pud_page() when s/fot/for/ Agreed that Dave's patch is better :) -- Cheers, David