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Howlett" , Andrew Morton , David Hildenbrand , Jonathan Corbet , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Randy Dunlap , 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 v1.1 5/5] Docs/mm/damon/design: update for pgidle_set probe filter Date: Wed, 9 Sep 2026 21:09:07 -0700 Message-ID: <20260910040911.148273-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910040911.148273-1-sj@kernel.org> References: <20260910040911.148273-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 15AAFA0004 X-Stat-Signature: 4zprs5mzci19dzwweb13c37d9dwyonwu X-Rspam-User: X-HE-Tag: 1789013366-888669 X-HE-Meta: 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 Bb+DhHyH hT2+h1VFHeqfIWvFfMzDXWx4jBbrk7l7R0pqD0nyhXG8VWnbySVBMLDN0wIEzPANhWabgIqbI+VGxrN92KT0LITCryKtaIEMeBGEa34V4KdMqJa3dSac28eDZjasXloq2tKlnsYDQMmqwtrJ5o/907/uvg1YAKaY7anIs3/TVnQFZ+TudAZteyVvGM3MAawzUJzIQrvJ8jRivt3nAzGJ38a8jN1jbjPzT8aNegYbHKJxBTexrCvOvFkK0MQCyCVL8z3nyQNfDHZaMuNKnY0xr2Votlg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Update DAMON design document for the newly added pgidle_set probe filter type. Signed-off-by: SJ Park --- Documentation/mm/damon/design.rst | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/design.rst index 8e980dde362de..cb116a82ff20b 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -299,6 +299,7 @@ filter types. Currently below filter types are supported. - ``memcg``: Same to that for DAMOS filters. - ``pgidle_unset``: Matches if the page for the memory is marked as not access-idle. +- ``pgidle_set``: Matches if the page for the memory is marked as access-idle. If such probes are registered, DAMON executes the probes for each region's sampling memory when it does the access :ref:`sampling @@ -314,7 +315,7 @@ actions are registered, DAMON applies the actions to each region's sampling memory before starting the next sampling interval. Currently only one action, ``set_pgidle`` is supported. The action marks the page for the probing target memory as access-idle. This can be useful to be used together with -``pgidle_unset`` probe filter. +``pgidle_unset`` or ``pgidle_set`` probe filter. This is a sampling based mechanism. Hence, it is lightweight but the output may include some measurement errors. The output should be used with good -- 2.47.3