[RFC PATCH 9/9] Docs/mm/damon/design: clarify bp is basis point
flat view
COLD33d
From: SJ Park <sj@kernel.org>
Date: 2026-09-12 20:08:26
Also in:
damon, linux-mm, lkml
Subsystem:
damon, documentation, memory management - misc, the rest · Maintainers:
SJ Park, Jonathan Corbet, Andrew Morton, David Hildenbrand, Linus Torvalds
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 <rdunlap@infradead.org> Closes: https://lore.kernel.org/107dc6ba-697e-4b25-ba3e-8ce2499cac9a@infradead.org (local) Signed-off-by: SJ Park <sj@kernel.org> --- 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 <damon_design_region_based_sampling>`. 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).
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2.47.3