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[87.161.163.214]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3b79c3ac51asm40503091f8f.1.2025.08.11.00.54.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 11 Aug 2025 00:54:59 -0700 (PDT) Message-ID: <9866c69f-e3da-4d47-bbb5-5dc2e91d71a8@redhat.com> Date: Mon, 11 Aug 2025 09:54:58 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] mm/memory-failure: fix infinite UCE for VM_PFNMAP'ed page To: Jinjiang Tu , linmiaohe@huawei.com, nao.horiguchi@gmail.com, akpm@linux-foundation.org, xueshuai@linux.alibaba.com, ziy@nvidia.com, osalvador@suse.de, linux-mm@kvack.org Cc: wangkefeng.wang@huawei.com References: <20250811043323.899130-1-tujinjiang@huawei.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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 B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAmgsLPQFCRvGjuMACgkQTd4Q 9wD/g1o0bxAAqYC7gTyGj5rZwvy1VesF6YoQncH0yI79lvXUYOX+Nngko4v4dTlOQvrd/vhb 02e9FtpA1CxgwdgIPFKIuXvdSyXAp0xXuIuRPQYbgNriQFkaBlHe9mSf8O09J3SCVa/5ezKM OLW/OONSV/Fr2VI1wxAYj3/Rb+U6rpzqIQ3Uh/5Rjmla6pTl7Z9/o1zKlVOX1SxVGSrlXhqt kwdbjdj/csSzoAbUF/duDuhyEl11/xStm/lBMzVuf3ZhV5SSgLAflLBo4l6mR5RolpPv5wad GpYS/hm7HsmEA0PBAPNb5DvZQ7vNaX23FlgylSXyv72UVsObHsu6pT4sfoxvJ5nJxvzGi69U s1uryvlAfS6E+D5ULrV35taTwSpcBAh0/RqRbV0mTc57vvAoXofBDcs3Z30IReFS34QSpjvl Hxbe7itHGuuhEVM1qmq2U72ezOQ7MzADbwCtn+yGeISQqeFn9QMAZVAkXsc9Wp0SW/WQKb76 FkSRalBZcc2vXM0VqhFVzTb6iNqYXqVKyuPKwhBunhTt6XnIfhpRgqveCPNIasSX05VQR6/a OBHZX3seTikp7A1z9iZIsdtJxB88dGkpeMj6qJ5RLzUsPUVPodEcz1B5aTEbYK6428H8MeLq NFPwmknOlDzQNC6RND8Ez7YEhzqvw7263MojcmmPcLelYbfOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCaCwtJQUJG8aPFAAKCRBN3hD3AP+DWlDnD/4k2TW+HyOOOePVm23F5HOhNNd7nNv3 Vq2cLcW1DteHUdxMO0X+zqrKDHI5hgnE/E2QH9jyV8mB8l/ndElobciaJcbl1cM43vVzPIWn 01vW62oxUNtEvzLLxGLPTrnMxWdZgxr7ACCWKUnMGE2E8eca0cT2pnIJoQRz242xqe/nYxBB /BAK+dsxHIfcQzl88G83oaO7vb7s/cWMYRKOg+WIgp0MJ8DO2IU5JmUtyJB+V3YzzM4cMic3 bNn8nHjTWw/9+QQ5vg3TXHZ5XMu9mtfw2La3bHJ6AybL0DvEkdGxk6YHqJVEukciLMWDWqQQ RtbBhqcprgUxipNvdn9KwNpGciM+hNtM9kf9gt0fjv79l/FiSw6KbCPX9b636GzgNy0Ev2UV m00EtcpRXXMlEpbP4V947ufWVK2Mz7RFUfU4+ETDd1scMQDHzrXItryHLZWhopPI4Z+ps0rB CQHfSpl+wG4XbJJu1D8/Ww3FsO42TMFrNr2/cmqwuUZ0a0uxrpkNYrsGjkEu7a+9MheyTzcm vyU2knz5/stkTN2LKz5REqOe24oRnypjpAfaoxRYXs+F8wml519InWlwCra49IUSxD1hXPxO WBe5lqcozu9LpNDH/brVSzHCSb7vjNGvvSVESDuoiHK8gNlf0v+epy5WYd7CGAgODPvDShGN g3eXuA== Organization: Red Hat In-Reply-To: <20250811043323.899130-1-tujinjiang@huawei.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 8h9nI6pZLsz-NjItDv8c7asYSWS68JaGjKgvK2tSKXk_1754898901 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: 9qw8pm3ub5mqocoihmg19g598xi9dn31 X-Rspam-User: X-Rspamd-Queue-Id: EB3F21A0003 X-Rspamd-Server: rspam02 X-HE-Tag: 1754898903-756950 X-HE-Meta: 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 gc0p49Ze 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 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: On 11.08.25 06:33, Jinjiang Tu wrote: > is not ordinarily mapped, but was mapped through > remap_pfn_range(), kill_accessing_process() wouldn't identify it as mapped > even though hwpoison_pte_range() would be prepared to handle it, because > walk_page_range() will skip VM_PFNMAP as default in walk_page_test(). As > a result, walk_page_range() will return 0, assuming "not mapped" and SIGBUS Acked-by: David Hildenbrand -- Cheers, David / dhildenb