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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9F6E7CA5FC4 for ; Fri, 2 Oct 2026 16:11:54 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4hxDLd0pLjz30DK; Sat, 03 Oct 2026 02:11:53 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip="2600:3c04:e001:324:0:1991:8:25" ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1790957513; cv=none; b=b4iN4+yZbTFyW3E3sT4x5MOTDa1NoX0wtLse66sifCbthqjG86r3IZAwPRnELywNJ9+L+cpUXXAGDamnzTJN35H9NDtQ8ZBAIecZaTXwODxF9BOkZteqbm6cQbVhr8daHK90BTmsQAB2CHrn4BS2P+L2MtaZTnWMfd4vRaqAISuoKBd0BcQX0dPt1c2+epDaRO0lc8TMN70YtlJ2vROJ1aKy6Xic4xA0OHtfMmjGSAsmKrNk8ivQU8NbclNJTbQrfTxXB7a6yvGJH4V2tHaN9n1D9amb+51Q3yz60kiVf5X5DM0rQT17LpIQOi5s8OJikFP8j9I25R0sP+SmUnMDNw== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1790957513; c=relaxed/relaxed; bh=d/BWqh3I+o1TpqkOrGVewyRNzXZFs+ZGIdSCNuZrwAQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=EW5ITBAL8TNjkdpadUh6dGARkTV+MyEgTZPdRb3+2RYPOjv67945MUN80i4nkQALv++28yN8IIc/R40WMc8RKoPQo2h835CMuN01ar4wcSmSQ6XK1uXuYtWmchcXRyMxlYiaFBHuFewZS+PIHUhsCINaSNOoAvu6dTErIKZNe665YlWGgavcE3RyBcJL4iSsoqQlmxMfptWMLleE79f1vigDgQ9xR9K3JW8X9n532/s/Qrw0meIbT0gzZNXHFRBJ0JWJKzX+49dj0RDq0wzkOfaqs1mQAAOszeXDHVb/CFOIE+GcfO92Yj7Uai7uP8PLrPcL5bxYcRuOKtfEy0hvxg== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=KlPBNFEO; dkim-atps=neutral; spf=pass (client-ip=2600:3c04:e001:324:0:1991:8:25; helo=tor.source.kernel.org; envelope-from=ljs@kernel.org; receiver=lists.ozlabs.org) smtp.mailfrom=kernel.org Authentication-Results: lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=KlPBNFEO; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=2600:3c04:e001:324:0:1991:8:25; helo=tor.source.kernel.org; envelope-from=ljs@kernel.org; receiver=lists.ozlabs.org) Received: from tor.source.kernel.org (tor.source.kernel.org [IPv6:2600:3c04:e001:324:0:1991:8:25]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4hxDLb63sjz2ygK for ; Sat, 03 Oct 2026 02:11:51 +1000 (AEST) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 868EE60A8C; Fri, 2 Oct 2026 16:11:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8488D1F000FF; Fri, 2 Oct 2026 16:11:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790957508; bh=d/BWqh3I+o1TpqkOrGVewyRNzXZFs+ZGIdSCNuZrwAQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=KlPBNFEOE0gGia6RZAPeBTgVB7HNktDmiscBZ7dS/dxuvyJV5qZ4EBnMmKRqBWf+p NlxsjCUCHTgzOy14NdmetFcItytYbmQN/W1Cz9uNprrziSxnI2AwI/H7kvg7pcE0Th apHw1PmIMxp0r8Tb82ZsCAY6CdcYuqB/iILLMgb+Hd9L8Z04owEifByqirNGM+qtq7 tnLVDa9jv/B19Ic1romkl3FQeHLFBdffX1K2/Z3MGzjcMTPK1VcbUS2u0EawxZYH+y GpQjr2jGxvYJz4PqGTUmJEW1o60Sr6vup0HAlwN8d+g/2nFyPIqzdSzcGp8to062lR qxk5wHC7LEjbQ== Date: Fri, 2 Oct 2026 17:11:18 +0100 From: "Lorenzo Stoakes (ARM)" To: "David Hildenbrand (Arm)" Cc: Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Jann Horn , Pedro Falcato , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonathan Corbet , Greg Kroah-Hartman , Dennis Dalessandro , Jason Gunthorpe , Leon Romanovsky , Paul Moore , Stephen Smalley , Jaroslav Kysela , Takashi Iwai , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Eduard Zingerman , Kumar Kartikeya Dwivedi , Zi Yan , Baolin Wang , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Usama Arif , Kiryl Shutsemau , Doug Gilbert , "James E.J. Bottomley" , "Martin K. Petersen" , Jaya Kumar , Simona Vetter , Helge Deller , Sebastian Reichel , John Hubbard , Peter Xu , Masami Hiramatsu , Oleg Nesterov , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Rik van Riel , Harry Yoo , Juri Lelli , Vincent Guittot , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Will Deacon , "Aneesh Kumar K.V" , Nick Piggin , Arnd Bergmann , Muchun Song , Oscar Salvador , "Matthew Wilcox (Oracle)" , Jan Kara , Marc Zyngier , Oliver Upton , Catalin Marinas , Madhavan Srinivasan , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , "David S. Miller" , Andreas Larsson , Alexander Viro , Christian Brauner , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Baoquan He , Youngjun Park , Johannes Weiner , Qi Zheng , Shakeel Butt , Axel Rasmussen , Yuanchu Xie , Wei Xu , Chengming Zhou , Michal Hocko , Miklos Szeredi , Xu Xin , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-usb@vger.kernel.org, linux-rdma@vger.kernel.org, selinux@vger.kernel.org, linux-sound@vger.kernel.org, bpf@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-trace-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, fuse-devel@lists.linux.dev Subject: Re: [PATCH v3 40/40] mm/vma: introduce and use vma[_flags]_can_gup() Message-ID: References: <20260917-b4-mmap-prepare-vma-flag-sanify-v3-0-4583d8a23bca@kernel.org> <20260917-b4-mmap-prepare-vma-flag-sanify-v3-40-4583d8a23bca@kernel.org> <202033a0-ea65-44de-8119-689e0df0b78e@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <202033a0-ea65-44de-8119-689e0df0b78e@kernel.org> On Fri, Oct 02, 2026 at 09:48:14AM +0200, David Hildenbrand (Arm) wrote: > Long story short: I wonder whether vma[_flags]_can_gup() is the right > abstraction, especially for users that don't actually *use* gup but just want > slightly similar semantics (no VM_IO|VM_PFNMAP). OK confirmed off-list that you would prefer this be dropped for now. -- Cheers, Lorenzo