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 A4806C55179 for ; Mon, 3 Aug 2026 13:37:48 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id C28606B00B6; Mon, 3 Aug 2026 09:37:47 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id BB21C6B00BA; Mon, 3 Aug 2026 09:37:47 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A53766B00D4; Mon, 3 Aug 2026 09:37:47 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 7A7336B00B6 for ; Mon, 3 Aug 2026 09:37:47 -0400 (EDT) Received: from smtpin22.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay03.hostedemail.com (Postfix) with ESMTP id C319BA066F for ; Mon, 3 Aug 2026 09:58:19 +0000 (UTC) X-FDA: 85059507918.22.5A28D62 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf22.hostedemail.com (Postfix) with ESMTP id 161B7C0003 for ; Mon, 3 Aug 2026 09:58:17 +0000 (UTC) Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=P6myUY3X; spf=pass (imf22.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-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1785751098; b=b5AQ6dRUY5IjphpmOsch9nczk3TU0qXNDldzEbBqTOADzhDYaf0BpTJhn2I3oK4JayDFfM EDFGNP5gSFONReccVjEdGwFd/Bd7C5SB4nIgsul3+1tFjvFzYLUX5tMwT8Z56r1IfIQAx4 gZzjUnwenRQ7HDfXJiS/rpYQYZEVYSM= ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=P6myUY3X; spf=pass (imf22.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=1785751098; 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=P8UnGQEOlr9FcmnvZVT8xoq/kYbj2bRkrjLSo5mwrl4=; b=OGBqMSp60o9oXCFJw9kukRhLS5hIVEyBpCJFKJNpTyvNJDuR5AvdsWSq+y8+n/Psf76B0P P0oTztTwXMcaFpT7oBf6UDekK6FUMK6i1AEMv1g9TKe2NHc8/G6SySf7xyoA/utWYm9G7o h7hzxYUeKWYrBjJdMN1M//pxdrnv/Ds= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 5218960A61; Mon, 3 Aug 2026 09:58:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 645551F000E9; Mon, 3 Aug 2026 09:58:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785751096; bh=P8UnGQEOlr9FcmnvZVT8xoq/kYbj2bRkrjLSo5mwrl4=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=P6myUY3Xbz49vwq6IgIb2kslwXvdReafe9z7l3yqlKBhRH6oL6atSWgcmYMMoXryB 11cIYedWL+sawg0/C+41yTk9MksOmpjYvpt5gJ3WtPOaKRTV1uWUJTKKP9ePhTHZwJ 256ALvNtP9ItZaJuqgAknonR7ZqsoUywFna3j9O65jXwkbtmNa9fe32JLcXAi2K51l YFh1GyppfyJUNFqAq/jvXbm9ZpJ94OMo8ow6xM/9JMCOs938n+X7eG5fTQNvPLorCt 2flhCHtXG+2zfcMKBjRy3ciJTg/z8AaFxd4Pq1iwwWT4KNf4aiWuFtmCXEhm6KikRe hQmRIobzYLPvw== Message-ID: <1d84f43f-6f59-4685-bd4d-ac7a724bff5a@kernel.org> Date: Mon, 3 Aug 2026 11:58:02 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 01/15] mm/vma: introduce VMA anon page offset field and add helpers To: "Lorenzo Stoakes (ARM)" Cc: Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato , "Matthew Wilcox (Oracle)" , Jan Kara , Miaohe Lin , Naoya Horiguchi , Rik van Riel , Harry Yoo , Lance Yang , Kees Cook , Zi Yan , Baolin Wang , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Usama Arif , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Peter Xu , Xu Xin , Chengming Zhou , Arnd Bergmann , Greg Kroah-Hartman , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org References: <20260729-b4-scalable-cow-virt-pgoff-v3-0-e8ecfefea812@kernel.org> <20260729-b4-scalable-cow-virt-pgoff-v3-1-e8ecfefea812@kernel.org> <2ac2746f-18b4-4960-8628-82e87c2140ce@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: 48cjj5o8zsg55bdo6jwhjwmyskkisrmk X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 161B7C0003 X-Rspam-User: X-HE-Tag: 1785751097-484257 X-HE-Meta: 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 TsOOTgFD rrzWC8zacdwBt3ysAVSJ5giPgzQ+D3M/CZDo7/28zLVQ0UYBtOPVozVGvKxiKBarx21gwgYd7m7LkOgYdsKNZJTjHuMyJDwrOEUugbSO+Dmckt7w2gE7qYEa24t8ehaz/aCJmAV4TFhT6lIevz22ZTigLSrleAVcanrlX2FT99tYscmvXYxatjMel232Nj3S2V7nff7JshiO9uFfa4eyQzl+icD3SOIGLM+3woYbfOCzMiNy9xdX37PzvSQWh9jtBIXMikdeWrguEzAIr1H1tdT6oue8UOU/a7qT6Y60Z1ttTX0r/gPDH179583n8UZ4U0qNYaYCup0x3Tx0= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: >> The former would be better >> >> __vma_set_start_anon_pgoff(dest, vma_start_anon_pgoff(src)); > > Ack that's fair, will update it. But looking at the existing code vma_set_pgoff(vma, vma_start_pgoff(vma) - delta); etc, maybe we can keep it as is for symmetry. -- Cheers, David