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 4EF9DEA3F27 for ; Wed, 11 Feb 2026 09:52:32 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id AD9296B0005; Wed, 11 Feb 2026 04:52:31 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A868F6B0089; Wed, 11 Feb 2026 04:52:31 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 989B56B008A; Wed, 11 Feb 2026 04:52:31 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 892B96B0005 for ; Wed, 11 Feb 2026 04:52:31 -0500 (EST) Received: from smtpin16.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 37FEA1B34A7 for ; Wed, 11 Feb 2026 09:52:31 +0000 (UTC) X-FDA: 84431710902.16.2964665 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf11.hostedemail.com (Postfix) with ESMTP id 693A24000A for ; Wed, 11 Feb 2026 09:52:29 +0000 (UTC) Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=D7y272Pw; spf=pass (imf11.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=1770803549; 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=MznkiduodhFwqc6+s4tdAQKjuitI7SIA33mvKF2Zmj0=; b=tzzUuqSAJGHNZO60HWgS6SovTXB0jcOwIe6aMeCP8lmSx7P0zu9b0LMEMyl013An50BWef qe5/r+8rOoAiQkzz/1RXjzrPg2UY04zjEa6tNatKxLv2YVLKWMzRtzziSmklLeaHPhhPQs eu/QZYbfE0SAkiJGyNFBPebDFNeh91o= ARC-Authentication-Results: i=1; imf11.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=D7y272Pw; spf=pass (imf11.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=1770803549; a=rsa-sha256; cv=none; b=6WHYjvZt1Pg4NU0Tb77b4U0E+ywDobUn1PQQ6PYZYy9HNVeC6JGoRONo9+sRWwcqwSVvxY LIEbPkMrb13joKt/mY/3260mpLMZK4w/1Wj9dHR1sAJAhEaIbWEp94x0gljGSQ0Si8OSAy Mv1MOTVLhgz+lOXSboQJSnB0qkrhMz4= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 5607540C1C; Wed, 11 Feb 2026 09:52:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 14F36C4CEF7; Wed, 11 Feb 2026 09:52:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770803548; bh=jZE7p6/Tv2joRtC8XY1WotTMk8EeJ2cN3zlOCKCCW/8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=D7y272Pw07UiclTv6Ke7GjHzbWPj31xJLtLZxihUrsfYCYOC+KEXlnBcepfQpmEEM ibl72TcF8jxAjdy2n/KD5ZFvBOn4bqZn2Qb3SHmAAaoo8tLMDy5Yqj94OHtEsjR/5u WJtqNIatEzBwsLk+IEn3/UG42hYwZ4TtCSWYMihVDmrKS4qNbo/yt8b5Hu13yipqd9 WoH+CuCxowHU4f+fkQv7b2ZwsGY6SFO4lYh01XpypD3yrLDjVpCGkwmZss2t2xzXIF um2LslDR9HlTxT9rtNVcdAdGHM9l1ce9EmfTeAfiwzt+Dn+RYx0oSDvUgArXAGFDm4 R6KNvmWrWgOJQ== Message-ID: <2359d7d3-61fa-4b29-9205-b9ad96839729@kernel.org> Date: Wed, 11 Feb 2026 10:52:19 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC 00/17] mm, kvm: allow uffd suppot in guest_memfd To: Mike Rapoport Cc: Peter Xu , linux-mm@kvack.org, Andrea Arcangeli , Andrew Morton , Axel Rasmussen , Baolin Wang , Hugh Dickins , James Houghton , "Liam R. Howlett" , Lorenzo Stoakes , Michal Hocko , Muchun Song , Nikita Kalyazin , Oscar Salvador , Paolo Bonzini , Sean Christopherson , Shuah Khan , Suren Baghdasaryan , Vlastimil Babka , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org References: <20260127192936.1250096-1-rppt@kernel.org> <0032ac8b-06ba-4f4b-ad66-f0195eea1c15@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; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 693A24000A X-Stat-Signature: 7be87un4tji1h4z9ez67dekme3wiascq X-Rspam-User: X-HE-Tag: 1770803549-385708 X-HE-Meta: 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 ewi23nr7 DyRZeLLALFbHC+18nDFS3wjzEYYB73k1yXNZIPAOcGB5Y0D/+uP4+awjuUfWcVfo+mNEA5t480STIHu0Czl3cr8V4tqGtgaLng8w/KPO3KoUAyPtg3RysQFGDsACgTqPgyL7ix2g5xDwMBagFqECND4a28sxA2m8e5otqVq86qAbZps03HSuum2H8xBV9dsLAHaOH7p+71JmFqcGLXm8nMWbwlHCYr+tJ6xw6NzfTANLq0tHkqj2h9lUbEKv1+/CC501mEzPfDO5nWddDWM+ymzsLhQmDJzoGmqZGu8QuXPFnPJSIzY/8mM/yiA== 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: >>> - >>> /* folio not in the pagecache, try to allocate */ >>> if (IS_ERR(folio)) >>> folio = __kvm_gmem_folio_alloc(inode, vmf->pgoff); >> >> That looks better in general. We should likely find a better/more consistent >> name for fault_process_userfaultfd(). > > __do_userfault()? :) Yes, that matches the naming scheme :) -- Cheers, David