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Wed, 15 Oct 2025 02:30:41 -0700 (PDT) Received: from localhost.localdomain ([2409:8900:1896:1396:9404:1b8d:6e77:8dd]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-b678df2360dsm14730127a12.25.2025.10.15.02.30.36 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Wed, 15 Oct 2025 02:30:40 -0700 (PDT) From: wang lian To: Andrew Morton Cc: David Hildenbrand , Lorenzo Stoakes , Zi Yan , Baolin Wang , "Liam R. Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Andrea Arcangeli , Rik van Riel , Wei Yang , linux-mm@kvack.org, linux-kernel@vger.kernel.org, wang lian Subject: [PATCH V2] mm/khugepaged: fix comment for default scan sleep duration Date: Wed, 15 Oct 2025 17:29:57 +0800 Message-ID: <20251015092957.37432-1-lianux.mm@gmail.com> X-Mailer: git-send-email 2.50.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: 4n18t7dtzzhwmeo8r6dirrxhw78xegbf X-Rspamd-Queue-Id: 773F34000B X-Rspamd-Server: rspam06 X-Rspam-User: X-HE-Tag: 1760520642-799382 X-HE-Meta: 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 5r6riMcS 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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: The comment for khugepaged_scan_sleep_millisecs incorrectly states the default scan period is 30 seconds. The actual default value in the code is 10000ms (10 seconds). This patch corrects the comment to match the code, preventing potential confusion. The incorrect comment has existed since the feature was first introduced. Fixes: ba76149f47d8 ("thp: khugepaged") Signed-off-by: wang lian Suggested-by: David Hildenbrand Reviewed-by: Dev Jain Reviewed-by: Wei Yang Reviewed-by: Lance Yang --- mm/khugepaged.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index e947b96e1443..d635d821f611 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -67,7 +67,7 @@ enum scan_result { static struct task_struct *khugepaged_thread __read_mostly; static DEFINE_MUTEX(khugepaged_mutex); -/* default scan 8*512 pte (or vmas) every 30 second */ +/* default scan 8*HPAGE_PMD_NR ptes (or vmas) every 10 second */ static unsigned int khugepaged_pages_to_scan __read_mostly; static unsigned int khugepaged_pages_collapsed; static unsigned int khugepaged_full_scans; -- 2.50.1 (Apple Git-155)