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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 5/7] Docs/mm/damon/design: document damos quota goal complement flag Date: Fri, 18 Sep 2026 07:28:24 -0700 Message-ID: <20260918142827.85303-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260918142827.85303-1-sj@kernel.org> References: <20260918142827.85303-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam04 X-Rspam-User: X-Stat-Signature: igc7tq67sxs86jdn1nai37ykf1m1u69r X-Rspamd-Queue-Id: 705E51C000D X-HE-Tag: 1789741718-698127 X-HE-Meta: U2FsdGVkX190PEctGThHoaPsxwF5H9fDigfz8Ii9dTed2HGvcy83RahULXE5CxkIPN1MGNDKz+MchVfFcqG1eGoGG1FkN+FX0rlIsEsU9A7OS3uSR2mokv4W3SCIBshvpwhF1sXwpXICVBUE5wIVC4GoQPW001bwXn73szeV5LorHh1oqKatP/KKC0nOUf0G43Q/u4iBCmCQJxdhJRU4Dgid3AWdb1ioA5wwIii84F2EwVW5jx4wc3QvQQK3645nc2A2xXx7QEN960ehcvn0dfSBzU8pi0AXGY9PXftTbDxGAVSzp3HadzodvyWT9v8c0uAk40y08F8RJToYbsxgjVRxl4eXTYHMrSd5/E/9FvtEUt0D7uCk3sqPFfHTkRSEXT+7LBtgyACg38CtxXKracD2oGi7DpS5tEk4MJI6Yg421OZm5dayjvglN0WKvpCJIZ+tJl8VSGOwJBT6zbLsf9WYbHWZnKXgcWXcxnBJa7rRUJfJ97l8H4V/YzvYLSisYwfrmURVyIUe0/uYlq6GeSWRZMwPVARDQCidddLX7amtSD4np7BpHFrrnlDI/b8c2Wt4lZSMzC6Edp8bvHXbDzlJcTVHBQRBK1XR/2aMYPhrrky4m/DZcPAru/uLNSA+UCsQ4cfJMLRcYy+a5ReejnA+YzFivIvcGn81unK72WsEL4Tt7oHTEJ6apCx+2OWYTRWljg5G5QHwXzcK8Vwv4lGMueXUrbSqlTz8kQr1IAnkawXPzlOY+Rd2FlfPJTC3Mlh68ZdKP3mDbnzJaFxyWq0SNv1Aa2M3k6DEILYgUxmSMUfsrUBONaZz6TmmCOg8/UBTDybA7KdgBlZjRGect3UeUDgNN4TsA2pvsiWNAdyLMJWBdyuaO2fvaM69BSwgBRktoVesPINT0CCYbCc5GPp1NSsTEGceEiXQKlUDWU+/5NiHFGl+xFuOhgOxVBPYu2Sj5Z1zYHcEPYWEhD0 tJicGthL asIKANievglvaAho8xPoudh1X0fRZ4EFAtNgmlRuYo+xEESsV3zj65/+vABroQtIyXarMuHljgOgalJ19ZWKTfISNAzbDJ5sud6kGMpJzi5iYjOF7JmMncdyIe2Ko2leC/p1XvOJQxCtxCk9aizPzTyDdrrblC1f8RO5p1cNLWGW1TusMRTwdfQSCjy2/+SDjDH5lijcMPobqYNapABkfpPQFyMf073npacG9Z0mnmR2A/hA= 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 damos quota goal metric value complement flag. Signed-off-by: SJ Park --- Documentation/mm/damon/design.rst | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/design.rst index e82390e77a70a..c82be80738c45 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -702,10 +702,10 @@ There are two such tuning algorithms that users can select as they need. that the zero quota is a valid quota, and therefore ``qt_exceeds`` :ref:`stat ` will keep increasing in this case. -The goal can be specified with five parameters, namely ``target_metric``, -``target_value``, ``current_value``, ``nid`` and ``path``. The auto-tuning -mechanism tries to make ``current_value`` of ``target_metric`` be same to -``target_value``. +The goal can be specified with six parameters, namely ``target_metric``, +``complement``, ``target_value``, ``current_value``, ``nid`` and ``path``. The +auto-tuning mechanism tries to make ``current_value`` of ``complement``-ed +``target_metric`` be same to ``target_value``. - ``user_input``: User-provided value. Users could use any metric that they has interest in for the value. Use space main workload's latency or @@ -733,6 +733,11 @@ mechanism tries to make ``current_value`` of ``target_metric`` be same to - ``hugepage_mem_bp``: Total huge page to total used memory ratio in bp (1/10,000). +``complement`` is a boolean parameter that determines whether to use +complemented value of the target metric. For example, if ``complement`` is set +and target metric is ``active_mem_bp``, it is effectively same to +``inactive_mem_bp``. + ``nid`` is optionally required for ``node_mem_used_bp``, ``node_mem_free_bp``, ``node_memcg_used_bp``, ``node_memcg_free_bp`` and ``node_eligible_mem_bp`` to point the specific NUMA node. -- 2.47.3