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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 5/5] Docs/mm/damon/design: update for pgidle_set probe filter Date: Sun, 6 Sep 2026 10:50:07 -0700 Message-ID: <20260906175009.93471-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260906175009.93471-1-sj@kernel.org> References: <20260906175009.93471-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: A009B20002 X-Stat-Signature: ynhrhtxe8rx5qjtqpqkmfqnpg1tai36w X-HE-Tag: 1788717019-900974 X-HE-Meta: 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 Ia0dJf1Q dA9G/NWjeho0ZepeJF58Hxx2eyXXiDFOHRAtnec00y/7I/nFXNRuwEJccZYDOH+K0WThMJ70IhJ2rlI482pqrKuMKR0X4+ITyRgGbp0JFAS7itr0Bdr/rN3mmwQ1UizZrP+dlEH+MAMnJgqQ6N/RocSCfepYP1z8bzXXWk+GftQz2SZFKjeBljD8OIMia2kQoHSGr0whlWiXI9AiIkYc/ZyAdUqCNrxLCGMjGCNYUDd79kUtxKLS9vFGPDiolCoFPAaPQv6395+rLiyczGGS6np6kZQpc1cR2TwJs 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 aac84de261aa8..22b785cd11dfe 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