From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta0.migadu.com (out-146.mta0.migadu.com [91.218.175.146]) (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 2CDF0390CA6 for ; Fri, 28 Aug 2026 04:13:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.146 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787890426; cv=none; b=PhvejtrG+RaNTtY0mE4kdHWW5Ry7EZXqnRmm+iLU3e6OzvWQvs9NVd4bIl+g1tSkTM44lioECvcce7PD1Duc9ze1syPx1jq8+/3p3rkmhmgmaIauTYanp9jMAyQK+Ax0hWjC/mUmvk/XOTONHmdrg805g4ZZSN4dQBpy2meqZxE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787890426; c=relaxed/simple; bh=/UeMi+JaZA3u+VpJfUjNutnV4evOAW5IF6lj0AjVMqs=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=dPpe9QxLtvUpVJKwxkIvaGTYOeEue0Zxr8qxiWnl6Ut0RWQyHaBZsfEd/dpNCBRGeM++NJJ4Sg6qxLy4jNWGtkbEaFlMCxlN7bsyvER5qjQHJz2X4qj8r3LPwHmAx4VhdFGd2PVbEuuiqw3We2KxvZGIn+A4hpF+rwfT5oH60CE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=AD5kw1eX; arc=none smtp.client-ip=91.218.175.146 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="AD5kw1eX" X-Envelope-To: linux-doc@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=/UeMi+JaZA3u+VpJfUjNutnV4evOAW5IF6lj0AjVMqs=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1787890422; v=1; x=1788495222; b=AD5kw1eXxJl8neo2OF9VN1B7HPwm/QbvdLYuIsNsJdUTXgJ+QrdjYYoijRykkZG/SFyHMl7v pzcetuM8TIN2g8YFhL7hh06uSla700DLGK2Fsc6qdEdyKUcCkHFzKcjagEN/4rWOlE2/uS3lE12 pWphzs3/eOMiaZN3qvCo8Z+M= X-Envelope-To: linux-doc@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id 8e322e2d7171c530; Fri, 28 Aug 2026 04:13:42 +0000 X-Mizu-Trace-ID: 8e322e2d7171c530 X-Migadu-Flow: FLOW_OUT Message-ID: <88698ac7-3a60-45b7-908a-7f1521c021aa@linux.dev> Date: Fri, 28 Aug 2026 12:13:20 +0800 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH v3 25/37] Docs/admin-guide/mm/damon/usage: document sample filters dir To: SeongJae Park Cc: "Liam R. Howlett" , Andrew Morton , David Hildenbrand , Jonathan Corbet , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Suren Baghdasaryan , Vlastimil Babka , damon@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org References: <20251208062943.68824-1-sj@kernel.org> <20251208062943.68824-26-sj@kernel.org> Content-Language: en-US From: Zenghui Yu In-Reply-To: <20251208062943.68824-26-sj@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 12/8/25 2:29 PM, SeongJae Park wrote: > Update DAMON usage document for the added DAMON sysfs files for > installing and setting the access sample results filtering. > > Signed-off-by: SeongJae Park > --- > Documentation/admin-guide/mm/damon/usage.rst | 25 +++++++++++++++++++- > 1 file changed, 24 insertions(+), 1 deletion(-) > > diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/admin-guide/mm/damon/usage.rst > index 897a89950351..365a4548a5ba 100644 > --- a/Documentation/admin-guide/mm/damon/usage.rst > +++ b/Documentation/admin-guide/mm/damon/usage.rst > @@ -66,6 +66,8 @@ comma (","). > │ │ │ │ │ │ intervals/sample_us,aggr_us,update_us > │ │ │ │ │ │ │ intervals_goal/access_bp,aggrs,min_sample_us,max_sample_us > │ │ │ │ │ │ sample/primitives/page_table,page_faults > + │ │ │ │ │ │ sample/filters/nr_filters > + │ │ │ │ │ │ │ 0/type,matching,allow,cpumask > │ │ │ │ │ │ nr_regions/min,max > │ │ │ │ │ :ref:`targets `/nr_targets > │ │ │ │ │ │ :ref:`0 `/pid_target,obsolete_target > @@ -233,7 +235,8 @@ writing to and rading from the files. > For more details about the intervals and monitoring regions range, please refer > to the Design document (:doc:`/mm/damon/design`). > > -Under ``sample`` directory, a directory, ``primitives`` exists. > +Under ``sample`` directory, two directories, ``primitives`` and ``filters`` > +exist. > > contexts//monitoring_attrs/sample/primitives/ > ------------------------------------------------ > @@ -245,6 +248,26 @@ to these files, users can select whether to use the :ref:`page table accessed > bit ` and :ref:`page fault events > `, respectively. > > +contexts//monitoring_attrs/sample/filters/ > +--------------------------------------------- > + > +This directory is for control of the :ref:`access sampling results filters > +`. At the beginning, this directory has > +only one file, ``nr_filters``. Writing a positive integer ```` to the file > +generates directories of the number, named ``0`` to ````. The generated > +directories represent the sampling result filters to install to the DAMON > +context, in the order of the directory names. Writing ``0`` to ``nr_filters`` > +removes the directories. > + > +Under the individual filter directory, five files, ``type``, ``matching``, nitpick: "four files" in this patch and "five files" in patch #32. > +``allow``, and ``cpumask`` exist. The first three files are same to the > +properties of the filter specified on the :ref:`design doc > +`. > + > +Users can specify the cpumask of the filter by writing it to ``cpumask``. The > +format for ``cpumask`` input is same to that for other cpumask inputs like that > +for cgroup cpusets. > + > .. _damon_usage_sysfs_monitoring_intervals_goal: > > contexts//monitoring_attrs/intervals/intervals_goal/ Thanks, Zenghui