The quilt patch titled
Subject: mm/damon/core: skip updating nr_accesses_bp for each aggregation interval
has been removed from the -mm tree. Its filename was
mm-damon-core-skip-updating-nr_accesses_bp-for-each-aggregation-interval.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: SeongJae Park <sj@xxxxxxxxxx>
Subject: mm/damon/core: skip updating nr_accesses_bp for each aggregation interval
Date: Fri, 15 Sep 2023 02:52:50 +0000
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@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Cc: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/core.c | 2 --
1 file changed, 2 deletions(-)
--- a/mm/damon/core.c~mm-damon-core-skip-updating-nr_accesses_bp-for-each-aggregation-interval
+++ a/mm/damon/core.c
@@ -1141,8 +1141,6 @@ static void damon_merge_regions_of(struc
else
r->age++;
- r->nr_accesses_bp = r->nr_accesses * 10000;
-
if (prev && prev->ar.end == r->ar.start &&
abs(prev->nr_accesses - r->nr_accesses) <= thres &&
damon_sz_region(prev) + damon_sz_region(r) <= sz_limit)
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
