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([2a09:80c0:192:0:5dac:bf3d:c41:c3e7]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a892e52b9esm15783021f8f.61.2025.07.02.02.44.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 02 Jul 2025 02:44:20 -0700 (PDT) Message-ID: <32a0cfdd-3f6e-47af-86f6-248149ae51ae@redhat.com> Date: Wed, 2 Jul 2025 11:44:19 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1] mm/vmscan: Account hwpoisoned folios in reclaim statistics To: 18810879172@163.com, akpm@linux-foundation.org Cc: zhengqi.arch@bytedance.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, wangxuewen References: <20250702093440.146967-1-18810879172@163.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/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz 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+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <20250702093440.146967-1-18810879172@163.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: cbRu0qNvd--zxUuwLwlDBVai2fIQw5CfteYji59tJzQ_1751449461 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: z59bs5578x7bb3xc5grfidc8dokpbopo X-Rspamd-Queue-Id: 578AA10000C X-Rspam-User: X-Rspamd-Server: rspam07 X-HE-Tag: 1751449464-208251 X-HE-Meta: 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 T9+GoxfE 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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 02.07.25 11:34, 18810879172@163.com wrote: > From: wangxuewen > > When encountering a hardware-poisoned folio in shrink_folio_list(), > we unmap and release the folio but fail to account it in the reclaim > statistics (sc->nr_reclaimed). This leads to an undercount of > actually reclaimed pages, potentially causing unnecessary additional > reclaim pressure. I'll just note that this kind-of makes sense: the memory is not actually reclaimed -- we don't get free memory back. The hwpoisoned page is lost. -- Cheers, David / dhildenb