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Thu, 13 Nov 2025 19:00:34 -0800 (PST) Received: from localhost ([185.92.221.13]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b734fad43dfsm292482866b.20.2025.11.13.19.00.33 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Thu, 13 Nov 2025 19:00:34 -0800 (PST) From: Wei Yang To: akpm@linux-foundation.org, david@kernel.org, lorenzo.stoakes@oracle.com, ziy@nvidia.com, baolin.wang@linux.alibaba.com, Liam.Howlett@oracle.com, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com Cc: linux-mm@kvack.org, Wei Yang Subject: [Patch v2 2/3] mm/khugepaged: continue to collapse on SCAN_PMD_NONE Date: Fri, 14 Nov 2025 03:00:27 +0000 Message-Id: <20251114030028.7035-3-richard.weiyang@gmail.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20251114030028.7035-1-richard.weiyang@gmail.com> References: <20251114030028.7035-1-richard.weiyang@gmail.com> X-Stat-Signature: k48wtgfg6w6qetzxoqcrqj6cabdah6xn X-Rspam-User: X-Rspamd-Queue-Id: 357DE140012 X-Rspamd-Server: rspam10 X-HE-Tag: 1763089236-720819 X-HE-Meta: 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 0fc1RnL6 cIuOBl3AiiqJbOfnCOq1LRu4Wuwd79ozRkQKvBb6FIYhvqBDQaTmXu0EN7vaa4AjorM9UGsSN87UPLCC5mywl36c1aM5DKHDG5sNUyVIuK2lCwQ2jng0sPuiGj/VFMFk3U1hN9I4+kfvNTCTagarBILPhExauj2zRl7OUVsHw1S4FEUOu5HB4D1mRvqBrg4T2Xq39LoZCrbWkODtTSFCybAiomOi1ky8cMe+xOWIb0RzYS2o3L9mG73jBRdsnDNazkKuSh0S7rbPu2G8aSQ6u4ynavGSa05tyDE1G5KBzoqw78uxvUi5vuEmQW26I5r4ITWbaSUWegfWJiiifBcNBB8LFfAHdGQ6gokoegKyvuf/0sLOs+dTw9QFObL6ND7lm9Q4AiGdRNhZTkOQIxGEIQ2j7G0vR4lz1Sckp+KsP91IGeEfbN70ukZwlYEaAiYlJ2EqoLn5qymS5O5NZFHiyXjioJgTtpIdBgiw0sAgEW52vCJ4e3In0Pvn8r4mcGWIJHrD40LT7Juo9aj4bTiL9xsxqLUaYjq6VAPWrKYlOs0+fG0H/Wz++lqbLwao8L1uW07Cv4rYmG6bE69nKSqnS8rlYjRk8J8GmjHO/u1vaimR/Ijnd4A4IAguX+/eI16T/8IL2Mfpl2/pjd4n6tZBTAgXCeQ== 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: SCAN_PMD_NONE means current pmd is empty, but we can still continue collapse next pmd range. Signed-off-by: Wei Yang Reviewed-by: Lance Yang Reviewed-by: Dev Jain Reviewed-by: Baolin Wang --- mm/khugepaged.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 1fc8986a28b3..2ee5048b764e 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -2833,6 +2833,7 @@ int madvise_collapse(struct vm_area_struct *vma, unsigned long start, goto handle_result; /* Whitelisted set of results where continuing OK */ case SCAN_PMD_NULL: + case SCAN_PMD_NONE: case SCAN_PTE_NON_PRESENT: case SCAN_PTE_UFFD_WP: case SCAN_LACK_REFERENCED_PAGE: -- 2.34.1