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(p200300d82f099c0081732a94640ddd31.dip0.t-ipconnect.de. [2003:d8:2f09:9c00:8173:2a94:640d:dd31]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3cf270fbd01sm25242063f8f.13.2025.09.03.13.05.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 03 Sep 2025 13:05:45 -0700 (PDT) Message-ID: <701a1718-fddc-4ae1-817d-d9549ad71a09@redhat.com> Date: Wed, 3 Sep 2025 22:05:44 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 01/12] mm: pass number of pages to __folio_start_writeback() To: "Darrick J. Wong" Cc: Joanne Koong , linux-mm@kvack.org, brauner@kernel.org, willy@infradead.org, jack@suse.cz, hch@infradead.org, jlayton@kernel.org, linux-fsdevel@vger.kernel.org, kernel-team@meta.com References: <20250829233942.3607248-1-joannelkoong@gmail.com> <20250829233942.3607248-2-joannelkoong@gmail.com> <20250903200210.GJ1587915@frogsfrogsfrogs> 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 ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20250903200210.GJ1587915@frogsfrogsfrogs> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 9EdA-AIJyWCAG6dqT9xVWIjR1uLGQVf0MwO7Tp8UbfY_1756929947 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 3C26810000A X-Stat-Signature: fmr4k8uizpbuhf4ubahtbkszyehbb596 X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1756929951-400150 X-HE-Meta: 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 Wkj849S1 CuPFYusiTmf8MvLOZ5I8Q+Js5ipThqMyex4khXBDs0yzW0vVKwPao1oBjLaNTdDuC13xvTH81NYvjK8nF22t6Vh73uJpqNJ7thaqJpla4oDSL00GZBSR4jMxDjDJ9DT4jWp2CInPfOvwv1rJyoEDGfpqS5mUQn0Jyt1ie+U48YEldsYtBKdiA4gMt3lxuCBJYCjPx3s5p74c+n8PIVkKd5Yq4FplWBdzbm7VSLCpLEK39zXY2U2jyfaXKAOzBvYmOLwBHo2nmm21IriXrodssdxr/4rG7hxbyaSFqiDrtTRhGyK84tIT1lCdeaHSr3O1G+iR27Fmxpo+LfyvMryFxbGYss6NctcDNStUMFha6S7qpHcg4TjCyWmX1zKdGSXNG8nlUo0tgWQTaHwBKaor+pkFpLttzH+jPwtvVfrS8zB5+gE1m4lozWPxQGA8OPqUfx8SiGmgFosdGuWFI0A1+qWaKwHlPnC5I1i5Y 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 03.09.25 22:02, Darrick J. Wong wrote: > On Wed, Sep 03, 2025 at 01:48:41PM +0200, David Hildenbrand wrote: >> On 30.08.25 01:39, Joanne Koong wrote: >>> Add an additional arg to __folio_start_writeback() that takes in the >>> number of pages to write back. >> >> Usually we pass something like page+nr_pages so we know the actual range. I >> assume here this is not required, because we only care about using the >> #pages for accounting purposes, right? > > I think all the "nr_pages" here are actually the number of dirty pages > in the folio, right? Or so I gather since later patches have iomap > walking bitmaps to find all the set/clear bits. Perhaps that parameter > ought to be called nr_dirty(_pages)? That would make perfect sense to me :) -- Cheers David / dhildenb