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Mon, 27 Oct 2025 22:02:24 +0800 (CST) Received: from dggpemf500012.china.huawei.com (unknown [7.185.36.8]) by mail.maildlp.com (Postfix) with ESMTPS id 1654F1402C6; Mon, 27 Oct 2025 22:02:52 +0800 (CST) Received: from huawei.com (10.50.85.135) by dggpemf500012.china.huawei.com (7.185.36.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Mon, 27 Oct 2025 22:02:51 +0800 From: Zhang Qilong To: , , , , , , , , , CC: , , , Subject: [RFC PATCH 0/3] mm: PTEs batch optimization in mincore and mremap Date: Mon, 27 Oct 2025 22:03:12 +0800 Message-ID: <20251027140315.907864-1-zhangqilong3@huawei.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.50.85.135] X-ClientProxiedBy: kwepems200002.china.huawei.com (7.221.188.68) To dggpemf500012.china.huawei.com (7.185.36.8) X-Rspam-User: X-Stat-Signature: y8n55zfan4finawpd8rzotd7f9jh93ur X-Rspamd-Queue-Id: D672F40023 X-Rspamd-Server: rspam09 X-HE-Tag: 1761573778-858895 X-HE-Meta: U2FsdGVkX1+cV9fgxOdN4bxtzCN4fi5ZRSx1oyN8Zn8qa31RrSEYr1DMofVwOCehTqsy2twZnJAptRCsYbBJwWVFLYTVL5ChEYuRapx1v1Btde5zANHjMv4GY5b95K6+BI6HokB2wxbLCeEy8Z43FAeVnTUHWBs4DyN7Tzi9rhhM+H5zzLbaH4wUga2XatCWpbhhKDm5wJAnGwYAFZ3/9NJukLbDAX2d7AGtmJEEWY8/olXTzntvH06VQIaxCLyFSQxSAE4uAVPQlxsQhLetloHIR4G6/vP45d8+CD3ibAteY6+baHAuyYiGmL8vdPvojeRBWkNAvR32AGtl6qkzzvSmhRy4aUqeQHedkhReIX4IQZC+1ff1pGNq/nEJZixA1cV+d4N2PThfI1ZpTge6t1gzaPqtSuBh58n4PPokV8l0Z9GO79QQpTCHfTRJ5k9hldr8KVsIXLceaEsWH1dRJ10acwDVxBWLbr03xDHlrACf6G8L14AoEAXlPpzWF9ALfOXsDf225FV2gmKErHxJOdW6qrxJTprEd5meU7gy8o1Z974hU68g2GTkpARSMJVpIwSDRy/JNjUTXwyhhLj0DSZPFacD+/MiUNt3QwwDYEwUDrZ6pZTu44JXcrolsV1mZthEM/J2ONPFAzKyGLI9uN4+a7GSdMJkCIPXbeI1meq8LWd/6sr7G2qsIMK2CPHSn6SX8dLTsfnZ6nzSO9dGtEZzvLMWhyJN4TuDXlD5H0tI4w9+3WL7HyeWYMOY8xLGRwk2jVIya4riUe+XxuMsd1Id4entvdVc7hN9w2vxLpkm9VE45s3BM3j6+4hXMwHOWv0HIasSOEsEKmT6KINW52OTSWIiLdSEeejB2IfJyvVTgMIyNJdsBvnvRY8mvmpqlwL8PnTXgCtUATKzZrg67zxkyCAQia70l/L9S54/pYeAqzOztYzhD+oeQQyJssWhuKzCKepmpRBEwoL2IYx T4Cupv4O T6PBW+fZ6xfx96SGevBLYoax5MA5T/8mJ3tezZenif+tPdq56oQvhxPDUmmUnlN7IHxm/yvcYmEYqiFRuzzxXub15hSoud1cX3cr+te01LQqlCGBAz8Vo5SD9knmPz/M6XyQhvwTOpI95cUEuiiGLWfmK3ECjk0aDvPi0WdkBp9QBSeFPcEImZ7dw/G008hL3PaKi7l8FmwiX4AMg5jIcbXZEmunYlQXtTxQZ7VolGduuychU2V+EczBC+ZCcwRcXN6NfZO7eMBf8YEs1jTk9XR7MxTfmv/F3/H/D 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: This first patch extract a new interface named can_pte_batch_count() from folio_pte_batch_flags() for pte batch. Thew new interface avoids folio access, and counts more pte, not just limited to entries mapped within a single folio. Caller need pass a range within a single VMA and a single page and it detect consecutive (present) PTEs that map consecutive pages. The 2th and 3rd patches use can_pte_batch_count() do pte batch. Zhang Qilong (3): mm: Introduce can_pte_batch_count() for PTEs batch optimization. mm/mincore: Use can_pte_batch_count() in mincore_pte_range() for pte batch mincore_pte_range() mm/mremap: Use can_pte_batch_count() instead of folio_pte_batch() for pte batch mm/internal.h | 76 +++++++++++++++++++++++++++++++++++++++------------ mm/mincore.c | 10 ++----- mm/mremap.c | 16 ++--------- 3 files changed, 64 insertions(+), 38 deletions(-) -- 2.43.0