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(p200300cbc707fe00bbeb98e6617adea1.dip0.t-ipconnect.de. [2003:cb:c707:fe00:bbeb:98e6:617a:dea1]) by smtp.gmail.com with ESMTPSA id p125-20020a1c2983000000b0038e6c62f527sm3892909wmp.14.2022.04.29.11.56.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 29 Apr 2022 11:56:04 -0700 (PDT) Message-ID: <9781c7e7-d84e-4911-396b-718514f76b1f@redhat.com> Date: Fri, 29 Apr 2022 20:56:02 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.6.2 Subject: Re: [PATCH v4 12/17] mm: remember exclusively mapped anonymous pages with PG_anon_exclusive To: Andrew Morton Cc: linux-kernel@vger.kernel.org, Hugh Dickins , Linus Torvalds , David Rientjes , Shakeel Butt , John Hubbard , Jason Gunthorpe , Mike Kravetz , Mike Rapoport , Yang Shi , "Kirill A . Shutemov" , Matthew Wilcox , Vlastimil Babka , Jann Horn , Michal Hocko , Nadav Amit , Rik van Riel , Roman Gushchin , Andrea Arcangeli , Peter Xu , Donald Dutile , Christoph Hellwig , Oleg Nesterov , Jan Kara , Liang Zhang , Pedro Gomes , Oded Gabbay , linux-mm@kvack.org References: <20220428083441.37290-1-david@redhat.com> <20220428083441.37290-13-david@redhat.com> <20220429112655.6b44dae1a93a9aa93adb0bcf@linux-foundation.org> From: David Hildenbrand Organization: Red Hat In-Reply-To: <20220429112655.6b44dae1a93a9aa93adb0bcf@linux-foundation.org> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 1D9EC20038 X-Stat-Signature: 3dfq6ybokaycec7sfkmuqywr3amdcujn Authentication-Results: imf31.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=QUpCwF0A; dmarc=pass (policy=none) header.from=redhat.com; spf=none (imf31.hostedemail.com: domain of david@redhat.com has no SPF policy when checking 170.10.133.124) smtp.mailfrom=david@redhat.com X-Rspam-User: X-HE-Tag: 1651258558-955576 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 29.04.22 20:26, Andrew Morton wrote: > On Thu, 28 Apr 2022 10:34:36 +0200 David Hildenbrand wrote: > >> Let's mark exclusively mapped anonymous pages with PG_anon_exclusive as >> exclusive, and use that information to make GUP pins reliable and stay >> consistent with the page mapped into the page table even if the >> page table entry gets write-protected. > > No reviewers on this one? > > Looks like I missed Vlastimils ACK on this one in his second reply: https://lkml.kernel.org/r/abc33620-b0dc-67e3-d3a9-2094475bf16e@suse.cz -- Thanks, David / dhildenb