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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonathan Corbet , Shuah Khan , damon@lists.linux.dev, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Liew Rui Yan Subject: [PATCH v2 2/3] docs/mm/damon/design: difference between watermarks and nr_snapshots Date: Wed, 12 Aug 2026 18:40:01 +0800 Message-ID: <20260812104002.15225-3-aethernet65535@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260812104002.15225-1-aethernet65535@gmail.com> References: <20260812104002.15225-1-aethernet65535@gmail.com> Precedence: bulk X-Mailing-List: damon@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Explain the difference between nr_snapshots reaches max_nr_snapshots and watermarks. Signed-off-by: Liew Rui Yan --- 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 939298f2a9b9..1fcf0b8c044b 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -872,7 +872,8 @@ the action to the region will fail. Unlike normal stats, ``max_nr_snapshots`` is set by users. If it is set as non-zero and ``nr_snapshots`` be same to or greater than ``nr_snapshots``, the -scheme is deactivated. +scheme is deactivated. Note that, unlike watermarks, even if a scheme's +``nr_snapshots`` reaches ``max_nr_snapshots``, monitoring will not stop. To know how user-space can read the stats via :ref:`DAMON sysfs interface `, refer to :ref:s`stats ` part of the -- 2.55.0