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b=biAvzbCvtcpPGdF+4LoJsvRg70YEs6XO/sUAaX6ZWHkVDiPi4ag/BPVaaxSDtZ6VY 1gDgSNFO1pLJEqWPXXsV0R4bgd3qg1EiiuJD+2c1DM2QXLS305cyRsi+FpQ6h/7glz vJsGsDYwH8kz0NVES2Pd8NkHc+NgjFGw+NhycI52ECtTEHcuUMrDcihLa1j5rN6J53 DzR0kyoo1s2ufNTsNkEqQFCVqTJgRf273Ne8WF7eGLjJRbrEmIvPI3TiraPHeiEZ9z wa3RxAfpucJgOYGzRuxBx0m3c86F+Bo9hV44UpSLUL7c+vBE1yjmVVHFKOY3YOv49I CKlnYAVwz943A== From: SJ Park To: Liew Rui Yan Cc: SJ Park , damon@lists.linux.dev, linux-mm@kvack.org Subject: Re: [PATCH 2/3] docs/mm/damon/design: difference between watermarks and nr_snapshots Date: Tue, 11 Aug 2026 06:48:27 -0700 Message-ID: <20260811134827.4557-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260811101841.804596-3-aethernet65535@gmail.com> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: DEF2F10000F X-Stat-Signature: 3skd4dbj3eqytyndgfurjfbm7okp6bbm X-HE-Tag: 1786456111-88206 X-HE-Meta: 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 o1kxbwqf iZn4/APbXAiJOSSajX8jTs7Ma+o+mCTmJqfg17zFdBGGztRUYOSel+lXUN7mvWUr1nabmG/B0JYaRIWAOmGBJe1ZAURUonwKWZkeM1S3iJXLqGftUHF47oTuIX9WDw/8tMsK6fUhWIZykhwoyzFBOAICS0/qugowrXI4xL29vbc6m14ZCgozdY3Zg09zE3mUiQpths6GH01gkwpeeS62QWI1FeH7+bHKADlv4WznyGnAaQIwA6Qil/AxH2oiWzEJB3NMS8P2mb9JgFIOBH/1HrPTyG0Wv/Tb72l6d7pZZri/KpbdnyTl1cq7KFgI6/F07H9jt Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, 11 Aug 2026 18:18:40 +0800 Liew Rui Yan wrote: > 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 Let's use two spaces between sentences, like other pargraphs in this file. > +``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 Thanks, SJ