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authorSeongJae Park <sj@kernel.org>2023-09-15 02:52:50 +0000
committerAndrew Morton <akpm@linux-foundation.org>2023-10-04 10:32:30 -0700
commit401807a316bb913f5eefcaf8343575ec9296d6b1 (patch)
tree0865b1174ec1d449dceccf0a6e426adb410a0f52 /mm/damon/Kconfig
parentace30fb21af5f1be1605db72c16040b95b1557ef (diff)
downloadlwn-401807a316bb913f5eefcaf8343575ec9296d6b1.tar.gz
lwn-401807a316bb913f5eefcaf8343575ec9296d6b1.zip
mm/damon/core: skip updating nr_accesses_bp for each aggregation interval
damon_merge_regions_of(), which is called for each aggregation interval, updates nr_accesses_bp to nr_accesses * 10000. However, nr_accesses_bp is updated for each sampling interval via damon_moving_sum() using the aggregation interval as the moving time window. And by the definition of the algorithm, the value becomes same to discrete-window based sum for each time window-aligned time. Hence, nr_accesses_bp will be same to nr_accesses * 10000 for each aggregation interval without explicit update. Remove the unnecessary update of nr_accesses_bp in damon_merge_regions_of(). Link: https://lkml.kernel.org/r/20230915025251.72816-8-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Brendan Higgins <brendanhiggins@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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