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([2001:b07:6468:f312:5e2c:eb9a:a8b6:fd3e]) by smtp.googlemail.com with ESMTPSA id ck30-20020a0564021c1e00b00445d760fc69sm772722edb.50.2022.08.18.02.09.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 18 Aug 2022 02:09:54 -0700 (PDT) Message-ID: Date: Thu, 18 Aug 2022 11:09:52 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.12.0 Subject: Re: [PATCH v7 01/14] mm: Add F_SEAL_AUTO_ALLOCATE seal to memfd Content-Language: en-US To: "Kirill A. Shutemov" Cc: David Hildenbrand , Chao Peng , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org, linux-doc@vger.kernel.org, qemu-devel@nongnu.org, linux-kselftest@vger.kernel.org, Jonathan Corbet , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H . Peter Anvin" , Hugh Dickins , Jeff Layton , "J . Bruce Fields" , Andrew Morton , Shuah Khan , Mike Rapoport , Steven Price , "Maciej S . Szmigiero" , Vlastimil Babka , Vishal Annapurve , Yu Zhang , "Kirill A . Shutemov" , luto@kernel.org, jun.nakajima@intel.com, dave.hansen@intel.com, ak@linux.intel.com, aarcange@redhat.com, ddutile@redhat.com, dhildenb@redhat.com, Quentin Perret , Michael Roth , mhocko@suse.com, Muchun Song References: <20220706082016.2603916-1-chao.p.peng@linux.intel.com> <20220706082016.2603916-2-chao.p.peng@linux.intel.com> <472207cf-ff71-563b-7b66-0c7bea9ea8ad@redhat.com> <20220817234120.mw2j3cgshmuyo2vw@box.shutemov.name> From: Paolo Bonzini In-Reply-To: <20220817234120.mw2j3cgshmuyo2vw@box.shutemov.name> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit ARC-Authentication-Results: i=1; imf15.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=ij1yc1LQ; spf=pass (imf15.hostedemail.com: domain of paolo.bonzini@gmail.com designates 209.85.221.52 as permitted sender) smtp.mailfrom=paolo.bonzini@gmail.com; dmarc=fail reason="SPF not aligned (relaxed), DKIM not aligned (relaxed)" header.from=redhat.com (policy=none) ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1660817023; a=rsa-sha256; cv=none; b=KCCC2zKJynlyx4u883JU/KeU/S400iHm9x2A8ymxH+3IKM7Memh6rpY79Jy/e95hEOrdxG tVMPvSGlZm8m9F9H8DIGH2pirwdMYigAl52xKIiYFGxMr7TMiLIDzi1v6wi+BnrJIkl+Tk 92wU64DAOiHRrb/go7C1aMkja/LOdec= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1660817023; h=from:from:sender: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=OM28IoofemszvZBGCPnenf9hx1PitiC3j3mv8pJzzLY=; b=fjwBjd+O+qmQbuKpXASy+cnNMp72eI5ecGSRASicNHzC67c6UJaihkI7SAaJ16GUOzFv3i po0Fsg3sps4/ePb8ejXf6vPr3FAiRaAcITpfX8V1QLEd1MksghHbL+M8VOn7V8pmRw5YJD mcrHa7ocjV0J37LlFz7XXWmV2a8HFAQ= Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=ij1yc1LQ; spf=pass (imf15.hostedemail.com: domain of paolo.bonzini@gmail.com designates 209.85.221.52 as permitted sender) smtp.mailfrom=paolo.bonzini@gmail.com; dmarc=fail reason="SPF not aligned (relaxed), DKIM not aligned (relaxed)" header.from=redhat.com (policy=none) X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 2C3C7A24D2 X-Stat-Signature: 4quda536zqs6qnbtgyisizg74iyhfxu3 X-Rspam-User: X-HE-Tag: 1660817023-406513 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 8/18/22 01:41, Kirill A. Shutemov wrote: > Note, that userfaultfd is only relevant for shared memory as it requires > VMA which we don't have for MFD_INACCESSIBLE. Oh, you're right! So yeah, looks like userfaultfd is not a problem. Paolo