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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 X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: AF8C220002 X-Stat-Signature: u3zhwc79opgm9x6j768bdr1wr6no7tcu X-Rspam-User: X-HE-Tag: 1787890423-524045 X-HE-Meta: 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 1Ggk07/W akI6koMmRVLbUz304ny1RWo6RclLzPvVFib/j2XOUyJdHinc+hMooam2TKii1OdhaKVh/BQ/YbgeoEkaFgGkMHx0KBXzauZol6smKqv6H/aWnZwWBX8fFDei4vyZHaP74woKfyQAc9s2GPDpBiTy0G3mkIRYuT/ilD4z94oWyVKl1QcDjaNoSsJKue4VHdu6/+JPom6FBlYF5Vekc/Bi0kJvzMfDiPrwNWl14u4u+edb4mH3W1YBnAtY1bdq3AD8W44/bN079pe3Doex32/04CXxO/V8ITMjwhVBoN94DuRnj10PX/c2TXKH0aNDCb30yU3XKtz0xgnaw5n9NIurzFUcwzc+VA4KLFR3E7ofntV4bHAWQqU7Aru9iJ77k1/q5IRUyyNTUDOF/bA95kv2aKLLSJerALFcVYsx8tmxulukax4GRoe25DN9U/w== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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