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(unknown []) by gzsmtp2 (Coremail) with SMTP id PSgvCgAH9a9hN4doAzUWCQ--.8415S2; Mon, 28 Jul 2025 16:40:02 +0800 (CST) From: Chi Zhiling To: willy@infradead.org, akpm@linux-foundation.org Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Chi Zhiling Subject: [PATCH v1 0/2] Tiny optimization for large read operations Date: Mon, 28 Jul 2025 16:39:50 +0800 Message-ID: <20250728083952.75518-1-chizhiling@163.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:PSgvCgAH9a9hN4doAzUWCQ--.8415S2 X-Coremail-Antispam: 1Uf129KBjvdXoW7Jr1UCw4fJr4fZw17GF4fAFb_yoWfCrc_ur WkZ34kGr42yFW3Ja1xAFZxXrZxt3yq9ryfZa40qFy3Gryjyrn7XFZ2kryfuF1UXr4xGFsx GanrXr93Zr17XjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7IU83Ef5UUUUU== X-Originating-IP: [116.128.244.169] X-CM-SenderInfo: hfkl6xxlol0wi6rwjhhfrp/1tbiFBSUnWiBj9Y5uAABs5 X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 47C521C0003 X-Stat-Signature: orjmws3t1xc7atzydpga41kmt9rz8iay X-HE-Tag: 1753692015-587064 X-HE-Meta: U2FsdGVkX1+A6vxm/x3ESDIwR+S88pKL161+U5XrE6OQkp1RQz2deLghSBfh2rV2tovpO5QDKWuDFDSEyvwL+gpz0MxElkahF3ReVUpZqG2ZW2gEfuXqzgH960gGHkeLozrO3VEA/CtxVO52E+8ASPvEDJX6lFcjrg7wq9mYGF7TGIk7CsgoL1ClsO1D6ZW2J1tLPX6LmQDWOzvg1bWzpa9DUZ5d95jbLpwJZ9Cxr+iYkp9GMh+e5cZ2IlyIUkFci3XEiFQIF2VNz57OcnokaH8m1kPzE5MlZfqqJbQEJWL6BvtnK7umQJXX4CtKK9USHNpchqCXMLJLVeUVoQHcPT+1jDWoY+8fPyk8rKE81mzltIw60oFp4pLBcpQsoPHYdVylwsC2tI6YB1TVF0C0BuQFHfLmyDSnBYHzlVqooA3m6erANETXPG8kU63bLYs8sSrsPMieGSWtaYp5rSMpEaBCpe3GvMhvj2CaVuU8VuGq5hDC0TgXMffPRXKgODGUxws1yX0mITVrulnQXYVv8imRNNCoSX7VL06uJTOaq1i+s/J4lZUUwBUh7hObC9d6M43Gfcn6vW/eEqk8sl/s7INyoeHMIU8uH9c0D4vfJl28suwyLa34hzEw8AZeoKmRU34p/svW41QbRBNjCECtEvTJCWOpKwaiQrfn+wwj4teQA1ZIA+TD3AlvRDUSJzdIJf4xoaNeuDgcbYKaJlYErGrOrkTfQdk2W7HeUnBHFm64+QJJSZOk51UBZMZbp+c5+kecrIla7Xgb8psf7pVGf6diSOJTeRRTFFKUlBxpIsRRifgxKCAk9KkKEuQXRzuJ1dEA0wvz0bWi4o+z/bh2SVft6mPCPv9wsaMIWJhrkQWtg/PxkNEiPw8cr/jZ6SkqECP2cSpAKhaHoSw882eEbKDipy/VGz4D+OXuj0lzXUFf69Ap3fAdiwrGSznzqZSOBorAn3gi4Iuu0Dqnh4H BZeJVesD 5Aq5UbCFLj/6JaWF/h8TUmSw6nJ+GYN5EjL3GG76A25zrglMTLPtAqMdsLSKDgseglbbHYgYCcPE0SPPztUgew49uEfO5GncspL6c96B7e3Zy7njMeNMJn8CoTFf4WvVY08iv0G+W7NbUlE91Do8M2HYrcRGvuSxRyHUyasjqF3TI9Ic+d4zLpGlgKXuyIySSxQ0c/dq1gzgf4dwOk/xl7N9md+DiBkKHOqYPS/Xx0P411AE0Do28+p99ROekUwLCLCF4SYq5MxZPCzfVxD0Z1RUYPTk15dG2Vp/t1F/SKPJkBwxacaNR5WmOK+5D8f7nk+Ss1jzq2wOxiH4DNjU6ohSHu1Z/yosqlnL/R7+4m929fOPKAzkSInBjYXAgvcpxH8a9rxsWJlQNQFoQHZFbdHlgpBon1MQHCs9+tdz2p0NYbZRB7IFG7EYtu3Q+7/aekETWOmMlWr8FzO+QQ9bc3cHVmQ== 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: From: Chi Zhiling This series contains two patches, 1. Skip calling is_partially_uptodate for entire folio to save time, I have reviewed the mpage and iomap implementations and didn't spot any issues, but this change likely needs more thorough review. 2. Skip calling filemap_uptodate if there are ready folios in the batch, This might save a few milliseconds in practice, but I didn't observe measurable improvements in my tests. Changes from rfc: - update commits - switch to the new solution which provided by Matthew Wilcox. rfc: https://lore.kernel.org/linux-fsdevel/20250723101825.607184-1-chizhiling@163.com/ Chi Zhiling (2): mm/filemap: Do not use is_partially_uptodate for entire folio mm/filemap: Skip non-uptodate folio if there are available folios mm/filemap.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) -- 2.43.0