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[2003:cb:c703:d300:8765:6ef2:3111:de53]) by smtp.gmail.com with ESMTPSA id g11-20020a5d540b000000b0022cdeba3f83sm8798705wrv.84.2022.11.14.00.07.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 14 Nov 2022 00:07:36 -0800 (PST) Message-ID: Date: Mon, 14 Nov 2022 09:07:34 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.0 Subject: Re: [PATCH RFC 00/19] mm/gup: remove FOLL_FORCE usage from drivers (reliable R/O long-term pinning) To: Christoph Hellwig , Linus Torvalds Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, etnaviv@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, linux-kselftest@vger.kernel.org, Andrew Morton , Jason Gunthorpe , John Hubbard , Peter Xu , Greg Kroah-Hartman , Andrea Arcangeli , Hugh Dickins , Nadav Amit , Vlastimil Babka , Matthew Wilcox , Mike Kravetz , Muchun Song , Lucas Stach , David Airlie , Oded Gabbay , Arnd Bergmann References: <20221107161740.144456-1-david@redhat.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit ARC-Authentication-Results: i=1; imf20.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=YR0p0aO6; spf=pass (imf20.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1668413261; a=rsa-sha256; cv=none; b=5cV5dWYCb/qHUoVBCpkvaz1GqfYbaJDm/s8m7wJfMHT/DwwzYsSFoKNZCjBFHujqV8c2pH KCwDnq6+O3UFE7ov6ER11H9yAaPQNX85+Z5+tqLgFCMeeNkQBxmukL0czgl19i8bOQb2ET ZUf06XtF4TCdF4dA4Df/q5YG4ykFTeE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1668413261; 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=Sc3OD/33LVOTPB4+NFeZBiaw904aPGsKctdDvYBcdUs=; b=2nMe6RxO8fmSlgO7zG7oAR8F6mf6fdwSG4xywyZj9lQBWw1YzAhgaYLm8ZDUvO3W6q3IAg Ow9Fd3TSaHeCoBokHS678xeyluKIfXaM2I+4SZoOHn1g+W/m1bZ36f2qfeuYn9dJKWgJs3 JxHTqa385N94dxeQ2hRzWQFpZh5AM7k= X-Stat-Signature: cyy1jzzjam83h9icdpc54edsmryct6ny X-Rspamd-Queue-Id: E56C31C0006 X-Rspam-User: Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=YR0p0aO6; spf=pass (imf20.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com X-Rspamd-Server: rspam11 X-HE-Tag: 1668413260-490773 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: On 14.11.22 07:03, Christoph Hellwig wrote: > On Mon, Nov 07, 2022 at 09:27:23AM -0800, Linus Torvalds wrote: >> And I'd really love to just have this long saga ended, and FOLL_FORCE >> finally relegated to purely ptrace accesses. > > At that point we should also rename it to FOLL_PTRACE to make that > very clear, and also break anything in-flight accidentally readding it, > which I'd otherwise expect to happen. Good idea; I'll include a patch in v1. -- Thanks, David / dhildenb