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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 Subject: [RFC PATCH v3 37/37] Docs/mm/damon/design: document write access sample filter type Date: Sun, 7 Dec 2025 22:29:41 -0800 Message-ID: <20251208062943.68824-38-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251208062943.68824-1-sj@kernel.org> References: <20251208062943.68824-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: q4u57ekmcwnhjihkdhndbbz81s94niet X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: B4F921A001D X-HE-Tag: 1765175448-896923 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 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 write access sample results filtering. Signed-off-by: SeongJae Park --- Documentation/mm/damon/design.rst | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/design.rst index 4c6d83263a7b..b194bf4a6519 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -148,7 +148,7 @@ the page protection in a way similar to that of NUMA balancing hinting faults. Then the page fault handler reports the faults happend by the installed page protection to DAMON core layer. Compared to the accessed-bit based one, this approach gives more information to DAMON, such as the access-generated -CPU/threads. +CPU/threads and whether it was for writing or reading. ``paddr`` uses :ref:`accessed-bit based check ` by default, and users can change @@ -317,6 +317,8 @@ Below ``type`` of access sampling results filter are currently supported. - threads - Whether the sampled access was generated by a thread that having a thread (task) id that exist in a given array of ids. +- write + - Whether the sampled access was for writing. .. _damon_design_age_tracking: -- 2.47.3