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Howlett" , 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: [PATCH 09/11] Docs/admin-guide/mm/damon/lru_sort: document active_mem_bp parameter Date: Tue, 13 Jan 2026 07:27:14 -0800 Message-ID: <20260113152717.70459-10-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260113152717.70459-1-sj@kernel.org> References: <20260113152717.70459-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 9B0BE20008 X-Stat-Signature: ff1ah3ym5ezjcftphmj4jkwqay6mg8di X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1768318054-238408 X-HE-Meta: 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 5tsFIfSI /YMZJRkFr2XQnrZeSHloXKlZzbbvWqpyKOL1daNMcZ4TCaKJkVJt9Csd9YuGX1C6VoCLIMOzzW/hRc3jO8mx6CYAp2JNuKqKJ5foChM116lOGglClYfXxHPgZwWUIvk7AHjyYvjXksTSz9ArMNEpg2lAUeIs0ONpenPinV6BWDFzVDvsrhH1p4iH8P93Y7QtliXqNYmMYjkjPKVC9AqSh+TSJXtVYnpeC4IY639nG6d3mknIX35I68d7bslds9GM7cLA1jC4icejDI+QNmS0H7ftE+Q== 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: Document a newly added DAMON_LRU_SORT parameter for doing auto-tuning aiming an active to inactive memory size ratio. Signed-off-by: SeongJae Park --- Documentation/admin-guide/mm/damon/lru_sort.rst | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/admin-guide/mm/damon/lru_sort.rst b/Documentation/admin-guide/mm/damon/lru_sort.rst index bb222a32aefd..6af3ab5579a3 100644 --- a/Documentation/admin-guide/mm/damon/lru_sort.rst +++ b/Documentation/admin-guide/mm/damon/lru_sort.rst @@ -79,6 +79,18 @@ of parametrs except ``enabled`` again. Once the re-reading is done, this parameter is set as ``N``. If invalid parameters are found while the re-reading, DAMON_LRU_SORT will be disabled. +active_mem_bp +------------- + +Desired active to [in]active memory ratio in bp (1/10,000). + +While keeping the caps that set by other quotas, DAMON_LRU_SORT automatically +increases and decreases the effective level of the quota aiming the LRU +[de]prioritizations of the hot and cold memory resulting in this active to +[in]active memory ratio. Value zero means disabling this auto-tuning feature. + +Disabled by default. + filter_young_pages ------------------ -- 2.47.3