From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 21A29C43458 for ; Thu, 9 Jul 2026 14:07:10 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B3B7F6B00A5; Thu, 9 Jul 2026 10:06:13 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B0ABC6B00A6; Thu, 9 Jul 2026 10:06:13 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9660A6B00A7; Thu, 9 Jul 2026 10:06:13 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 713A86B00A5 for ; Thu, 9 Jul 2026 10:06:13 -0400 (EDT) Received: from smtpin12.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 09506C09F4 for ; Thu, 9 Jul 2026 14:06:13 +0000 (UTC) X-FDA: 84969412626.12.82FBFE6 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf22.hostedemail.com (Postfix) with ESMTP id 5B3E2C0009 for ; Thu, 9 Jul 2026 14:06:11 +0000 (UTC) Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=E4231nrm; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf22.hostedemail.com: domain of sj@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=sj@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1783605971; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=CCjb58wtAAk5F9PdDMQvKlFN0DE7q9fXquVywqvC5OU=; b=SF8Ft573is6cgxH/3y7TveG1i6AyWnxIonFzLDcpMUikMbZG2132+IxWdX0NfuIM9VOL1N dHG1S/+K5Slgl1mq0R2LWkhhRDRYjWqRwmHHYpqscU/5SKboSR+W34xS6U7Nxw2fb9K12f ZzdjysN0u4LXqgZKipeXxKhiT6j3CvY= ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=E4231nrm; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf22.hostedemail.com: domain of sj@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=sj@kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1783605971; b=WXIt0r8AfoLiSfvpTCqVfQwofYtw+AuZbMQBuWOYCWx8jo456+2mLi57WXyQ64Ee5UaFSk 1duWdmmi8YsbTySp7wtZigLtvSqTpLFSkOslm4JQqUHxtBGrjcWJSTZNZCyGs/MXfCVz97 lvuqYSPM5caiPJ16XwEHhhV+TWL7cQw= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 2C59742E4A; Thu, 9 Jul 2026 14:06:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4FE301F00A3E; Thu, 9 Jul 2026 14:06:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783605971; bh=CCjb58wtAAk5F9PdDMQvKlFN0DE7q9fXquVywqvC5OU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=E4231nrmhGQ5ukLReRLVDZIAzyt76r360wdxDclPmJDeyjYjGCBKhJtsTzRfnbKjU I+4TC21pOjR0PVu3Hpg259SLeMiFCqYDkTI39jWMsSZbt69rgMFXyT+Lpwynqo4T8+ ZQgT21Sh51dG9qNccfgdSRXtUutErpyCIkcsvPsd/IBChclIHkhRgtHp1PR0GSrgyV DQj0+sCMmbPfvhiw6verabX5TA57H6ikmVSjKBBb8TsdmyKeGK16mzbVBU/PEaghPn VqJTgjlw+wFU4pw6MsLNkWGsYOF/ijEaJzTC/HrB2ZUTKy5EI2htVNSH2E94Noi+sC KDH7QE7YevxwA== From: SJ Park To: Cc: SJ Park , "Liam R. Howlett" , Andrew Morton , David Hildenbrand , Jonathan Corbet , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Shuah Khan , Suren Baghdasaryan , Vlastimil Babka , damon@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v1.2 18/19] Docs/admin-guide/mm/damon/usage: document weight sysfs file Date: Thu, 9 Jul 2026 07:05:56 -0700 Message-ID: <20260709140600.90950-19-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260709140600.90950-1-sj@kernel.org> References: <20260709140600.90950-1-sj@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Stat-Signature: 7x6c4x9xqbqa1pddnspw64yo8d8cqgyu X-Rspamd-Queue-Id: 5B3E2C0009 X-Rspamd-Server: rspam01 X-Rspam-User: X-HE-Tag: 1783605971-86071 X-HE-Meta: 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 M3RJ6Y8Y y7fbNk+mMZf+OLNGGxbTtsc0uOldG5XV5Y8PfxLVaUfydENFaYQCWpJvDmN4eqaxmgM0trz99NQMQOHx1C88E4kgJSqfVEHVdFlGvD8aGfvJmRjySITlYqiNZfGUPAlAlB2twBeIp+WXNB1AKF47l7UVXk6IV4k/1kqcHzdanyRZ1vHCStbM45s/UYbdt9j00m606wxZRzCBZjjActRHlaFhdJfv9aniqTgru20SExRN9m2s8Ov1Yydq7/7wtZx3P54YN17EGbHSkKqthSEW87x65yIK3ERLqi+H7bicxM0BXW7ptQzIeK/wvBA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Update DAMON usage document for newly added probe weight file. Signed-off-by: SJ Park --- Documentation/admin-guide/mm/damon/usage.rst | 11 ++++++++--- Documentation/mm/damon/design.rst | 5 +++++ 2 files changed, 13 insertions(+), 3 deletions(-) diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/admin-guide/mm/damon/usage.rst index b2649ea011f93..da5f9afd08aef 100644 --- a/Documentation/admin-guide/mm/damon/usage.rst +++ b/Documentation/admin-guide/mm/damon/usage.rst @@ -73,9 +73,10 @@ comma (","). │ │ │ │ │ │ │ intervals_goal/access_bp,aggrs,min_sample_us,max_sample_us │ │ │ │ │ │ nr_regions/min,max │ │ │ │ │ │ :ref:`probes `/nr_probes - │ │ │ │ │ │ │ 0/filters/nr_filters - │ │ │ │ │ │ │ │ 0/type,matching,allow,path - │ │ │ │ │ │ │ │ ... + │ │ │ │ │ │ │ 0/weight + │ │ │ │ │ │ │ │ filters/nr_filters + │ │ │ │ │ │ │ │ │ 0/type,matching,allow,path + │ │ │ │ │ │ │ │ │ ... │ │ │ │ │ │ │ ... │ │ │ │ │ :ref:`targets `/nr_targets │ │ │ │ │ │ :ref:`0 `/pid_target,obsolete_target @@ -286,6 +287,10 @@ In each probe directory, one directory, ``filters`` exists. The directory contains files for installing filters for the probe, that is used to determine the data attribute for the probe. +Each probe directory also contains ``weight`` file. Reading from and writing +to the file gets and sets the :ref:`attributes-only monitoring +` weight for the attribute of the probe. + In the beginning, ``filters`` directory has only one file, ``nr_filters``. Writing a number (``N``) to the file creates the number of child directories named ``0`` to ``N-1``. Each directory represents each filter and works in a diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/design.rst index 6d79e7d69be84..aed6cb1cf4831 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -316,6 +316,8 @@ Another way to do this for higher accuracy is using :ref:`DAMOS filter information in page level. But, because it is operated in page level, the overhead is proportional to the size of the memory. +.. _damon_design_attrs_only_monitoring: + Data Attributes-only Monitoring ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -336,6 +338,9 @@ automatically turned off. The access counter (``nr_accesses``) will always be zero and not updated. Hence the mode is called Data Attributes "only" monitoring. +Refer to the :ref:`admin guide ` to know how users +can use the mode. + Dynamic Target Space Updates Handling ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- 2.47.3