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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 v2 10/10] Docs/mm/damon/design: clarify bp is basis point Date: Wed, 16 Sep 2026 21:05:36 -0700 Message-ID: <20260917040537.107341-11-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260917040537.107341-1-sj@kernel.org> References: <20260917040537.107341-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: E77C44000B X-Stat-Signature: hxggwz16aa7d3gfjxhm618gwfi7bhn8o X-HE-Tag: 1789617949-498393 X-HE-Meta: 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 DRrRPbii XLF72XlHJYmaHPmHZrxXTwbra/jSmoKyvxm1BlNj8E5o7mXAYG9dkOqNS93b7RUAt6kFF68WGYet9DyvqSiXZI3EN2TLqD7IvwaoJFdVF57OJUod4XcH5w2jBm/wsP7k39ukqxFNzqkTj1nP9htFLcsXs/8ovooL/g/g1N4YilRJO1WMiD2PsX2m46tb9O7q9Wos4AL9EO52tRuqnJEu26p2bMW0LrppFThxAb9a8jKlz4t9gdrrxrsmPnowImdHZ8SMQnaQqWMM/3y19a6vf1P0a+T7MoYzZwFyL Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: DAMON design document uses "bp" for "basis point" in multiple places. Because it is not clearly mentioned, it is difficult to understand what "bp" stands for. Add the clarification. Reported-by: Randy Dunlap Closes: https://lore.kernel.org/107dc6ba-697e-4b25-ba3e-8ce2499cac9a@infradead.org Acked-by: Randy Dunlap Signed-off-by: SJ Park --- Documentation/mm/damon/design.rst | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/design.rst index 0a86792f90a18..e82390e77a70a 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -445,7 +445,7 @@ users to set the aimed amount of access events to observe via DAMON within given time interval. The target can be specified by the user as a ratio of DAMON-observed access events to the theoretical maximum amount of the events (``access_bp``) that measured within a given number of aggregations -(``aggrs``). +(``aggrs``). The ratio is in basis point (bp or 1/10,000). The DAMON-observed access events are calculated in byte granularity based on DAMON :ref:`region assumption `. For @@ -717,7 +717,8 @@ mechanism tries to make ``current_value`` of ``target_metric`` be same to in microseconds that measured from last quota reset to next quota reset. DAMOS does the measurement on its own, so only ``target_value`` need to be set by users at the initial time. In other words, DAMOS does self-feedback. -- ``node_mem_used_bp``: Specific NUMA node's used memory ratio in bp (1/10,000). +- ``node_mem_used_bp``: Specific NUMA node's used memory ratio in basis point + (bp or 1/10,000). - ``node_mem_free_bp``: Specific NUMA node's free memory ratio in bp (1/10,000). - ``node_memcg_used_bp``: Specific cgroup's node used memory ratio for a specific NUMA node, in bp (1/10,000). -- 2.47.3