From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f175.google.com (mail-pl1-f175.google.com [209.85.214.175]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 145191DE3A4 for ; Wed, 15 Oct 2025 09:30:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.175 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760520643; cv=none; b=YWVZBA/AKHshVNUmaNt/awn5Sv/RDkiyc9kBvXH1v6sWeYEH5I7yHfa5s1/6QuByk4ZTCmvrbYbWsz7Wz28VmEDhJK/j9XbVhC+9rrwjDrrhgjZNNkd0Ax48P96CghXtYnOgjYaTmmP2z4LLez2W0nRq6J4MML5NypiX7zkDGWE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760520643; c=relaxed/simple; bh=lVOibV+iWGIwrT0uJn7Qm/GWUejLW2DJH+QQTNdRMZY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=MrD0oWObUSVCL0qbqjYLe3YiyCyw0ve5DG1e6ST0C9+ZjhUbiVVbD45ITsDcFiYjdmAaw43RK8ewX8ombze0212W6V3sRPnUjWe1qoj0yUHAP2qRA4X3JFwoLtTlSQrmdqMqJZ8nWLDe/iHPwFqSV5456oHUoqrzX1sYrjqQqq0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=H37JO8ck; arc=none smtp.client-ip=209.85.214.175 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="H37JO8ck" Received: by mail-pl1-f175.google.com with SMTP id d9443c01a7336-2681660d604so68674825ad.0 for ; Wed, 15 Oct 2025 02:30:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1760520641; x=1761125441; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=XDtXgZFzYXZK/ibRrp5PX9uMJOOke03pAz5gDdS9N8M=; b=H37JO8ckh0jJua1+x4lRw9G2QWIKjBjZvp1Ky8xqJfZc0u9OcW9ScUmH5zGhSgM4Gs KbUYWwp+V7KztMTi9xoG0rmmyqJ7dalqFTVnIAx/OSfbkCNri2qnDgBGOLkGId4oZY8s EwnV0U9vAFNAjgNwHT4bRcuvnPZMo9UhSRiTmGrWRhtUFrZTpQNV4HA06sLEmJlb4szQ bvg8UEzD9BAG2DfFeDNByWwTX346Ci7ry8XWJuwjXSgkVeOUvSWvVlVhC4YfuhA2Sxax n0OwbMgsBTO64wIrrkwEfcXMDDjxrXZZztG391+D2XzBaPABhwdO4JzGWskg0ueAKeSz yd4Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760520641; x=1761125441; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=XDtXgZFzYXZK/ibRrp5PX9uMJOOke03pAz5gDdS9N8M=; b=jDmJ7LRA+QoqkitCaBaoBOKA0s1O7j9m9SUZ1ph1wYJbGRWfKz4OXdUcJkCOW+VEyh wL+s4/L+5mJdxe7pj8xzD/Lzf5kJmnpETkGnTwiuoouEXcUrK0IHu9bVV2FjC91mc4PY M/LATKN7Brz+XWRFZCVBDAalGVLciz6yVg5unY1YSBaIqsOS0oOn+ECdbe05erkIF3i2 B7l2pkQDM2gtqxFXQnQ6cpfv5gmbmc9jP1c1AsYyyfdVEPTLgWss5Il88ArZtvjx1Z6p NxlrEkbM2On5BM4VgVxbEjLlwhFt4HQIrlJS2zTA3L1iDnRcp44DY4lcB067zjiHwDIf HXzg== X-Forwarded-Encrypted: i=1; AJvYcCX+WA3s67BDi9MNMPTgZbUVPDBnXRDYWjrjex9AwghORGVPeWh/vqmKlFP3HuSRoAqD8wbWugzX76asfGY=@vger.kernel.org X-Gm-Message-State: AOJu0Yz/nkGPhmlFibE/Moiph5cIbmHQiO6SJJS4NQhjl1/BvWpti/7S hEJAxyY5RyMYlKRz55omcHpe/wD1LZajXuBpWzjUH6+Bz8+gZLGiZDfU X-Gm-Gg: ASbGnctCn+OzYBldqg0fN02KHhRK4MvayYmD3v3BlaQI5cNE52tdt0wJqlY6GGkxphm YLor2SV5pQ8R2/RDNHNt7iyCyGHryRoahh4eANB8CaHM8pLKDtPGFzDF7zJcSs3PeAPfiBbCtty QkIi7LTnTEyWVEg5Mo63EezlFPfSnelZJH6AWzWwsBwURt0HCxmZAv20KU2ZaCmg2gK+cVckqDB 1UDAJhwQbfROW4TcObQgW610XMwizi0e/JvgdqdxJ4jG54mHNMLNN0Qke7buvNl07g0vG373202 sR4j2tjSAvhsl2GBGvS65NWqTSNZe5DYyCwcSyAxRCJ/OFR1YOvcxZ/jRFVgV1oGvQ3b7EGaKOX 7mqi3seBGdeTeO7Wm/W+RAKKPUCXaWblrP+PVHogG9tTg2La1mbgORVtOmOIboLix2KpFBcnJ0A LmtRpDT3cBamMwoA== X-Google-Smtp-Source: AGHT+IEK9gGd4ylhL+ohQ0j4ij/MvWMWaktFv9kBT3L4nH8VbW7kaaXONU81DrtfDoVueDQoE/cLTg== X-Received: by 2002:a17:903:3c4f:b0:25c:5bda:53a8 with SMTP id d9443c01a7336-290272b5529mr333496115ad.37.1760520641158; 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 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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)