+ mm-damon-core-remove-damon_region-nr_accesses_bp.patch added to mm-new branch

+ mm-damon-core-remove-damon_region-nr_accesses_bp.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: mm/damon/core: remove damon_region->nr_accesses_bp
has been added to the -mm mm-new branch.  Its filename is
     mm-damon-core-remove-damon_region-nr_accesses_bp.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-core-remove-damon_region-nr_accesses_bp.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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and is updated there most days

------------------------------------------------------
From: SJ Park <sj@kernel.org>
Subject: mm/damon/core: remove damon_region->nr_accesses_bp
Date: Mon, 29 Jun 2026 21:08:11 -0700

No code touches damon_region->nr_accesses_bp field.  Remove it.

Link: https://lore.kernel.org/20260630040812.149729-19-sj@kernel.org
Signed-off-by: SJ Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/damon.h |   10 ----------
 mm/damon/core.c       |    3 +--
 2 files changed, 1 insertion(+), 12 deletions(-)

--- a/include/linux/damon.h~mm-damon-core-remove-damon_region-nr_accesses_bp
+++ a/include/linux/damon.h
@@ -45,8 +45,6 @@ struct damon_size_range {
  * @ar:			The address range of the region.
  * @sampling_addr:	Address of the sample for the next access check.
  * @nr_accesses:	Access frequency of this region.
- * @nr_accesses_bp:	@nr_accesses in basis point (0.01%) that updated for
- *			each sampling interval.
  * @probe_hits:		Number of probe-positive region samples.
  * @list:		List head for siblings.
  * @age:		Age of this region.
@@ -59,13 +57,6 @@ struct damon_size_range {
  * not be done with direct access but with the helper function,
  * damon_update_region_access_rate().
  *
- * @nr_accesses_bp is another representation of @nr_accesses in basis point
- * (1 in 10,000) that updated for every &damon_attrs->sample_interval in a
- * manner similar to moving sum.  By the algorithm, this value becomes
- * @nr_accesses * 10000 for every &struct damon_attrs->aggr_interval.  This can
- * be used when the aggregation interval is too huge and therefore cannot wait
- * for it before getting the access monitoring results.
- *
  * @age is initially zero, increased for each aggregation interval, and reset
  * to zero again if the access frequency is significantly changed.  If two
  * regions are merged into a new region, both @nr_accesses and @age of the new
@@ -75,7 +66,6 @@ struct damon_region {
 	struct damon_addr_range ar;
 	unsigned long sampling_addr;
 	unsigned int nr_accesses;
-	unsigned int nr_accesses_bp;
 	unsigned char probe_hits[DAMON_MAX_PROBES];
 	struct list_head list;
 
--- a/mm/damon/core.c~mm-damon-core-remove-damon_region-nr_accesses_bp
+++ a/mm/damon/core.c
@@ -3636,8 +3636,7 @@ static int kdamond_fn(void *data)
 				 * aggregation, and make aggregation
 				 * information reset for all regions.  Then,
 				 * following kdamond_reset_aggregated() call
-				 * will make the region information invalid,
-				 * particularly for ->nr_accesses_bp.
+				 * will make the region information invalid.
 				 *
 				 * Reset ->next_aggregation_sis to avoid that.
 				 * It will anyway correctly updated after this
_

Patches currently in -mm which might be from sj@kernel.org are

mm-damon-sysfs-schemes-fix-dir-put-orders-in-access_pattern_add_dirs.patch
mm-damon-sysfs-schemes-put-stats-for-scheme_add_dirs-internal-error.patch
mm-damon-ops-common-handle-extreme-intervals-in-damon_hot_score.patch
mm-damon-add-a-kernel-doc-comment-for-damon_ctx-probes.patch
mm-damon-add-a-kernel-doc-comment-for-damon_ctx-rnd_state.patch
maintainers-s-seongjae-sj.patch
samples-damon-wsse-handle-damon_start-failure.patch
samples-damon-prcl-handle-damon_start-failure.patch
samples-damon-mtier-handle-damon_start-failure.patch
samples-damon-mtier-handle-damon_stop-failure.patch
samples-damon-wsse-stop-and-free-damon-ctx-when-damon_call-fails.patch
samples-damon-prcl-stop-and-free-damon-ctx-when-damon_call-fails.patch
mm-damon-sysfs-kobject_del-target-normal-context-and-kdamond-dirs.patch
mm-damon-sysfs-kobject_del-region-and-target-error-dirs.patch
mm-damon-sysfs-schemes-kobject_del-scheme-dirs.patch
mm-damon-sysfs-schemes-kobject_del-scheme-region-dirs.patch
mm-damon-sysfs-schemes-kobject_del-scheme-filter-dirs.patch
mm-damon-sysfs-schemes-kobject_del-scheme-quota-goal-dirs.patch
mm-damon-sysfs-schemes-kobject_del-scheme-action-destination-dirs.patch
mm-damon-sysfs-kobject_del-probe-dirs.patch
mm-damon-sysfs-kobject_del-probe-filter-dirs.patch
mm-damon-sysfs-kobject_del-probe-dirs-in-probes_addd_dir-error-path.patch
mm-damon-sysfs-schemes-kobject_del-region-for-populate_region-error.patch
docs-mm-damon-design-update-for-damos_quota_node_eligible_mem_bp.patch
docs-abi-damon-document-probe-files.patch
mm-damon-tests-core-kunit-test-damon_rand.patch
selftests-damon-sysfssh-test-multiple-probe-dirs-creation.patch
selftests-damon-sysfssh-test-coreops_filters-directories.patch
selftests-damon-sysfssh-test-dests-dir.patch
selftests-damon-sysfssh-test-all-files-in-quota-goal-dir.patch
mm-damon-core-reduce-range-setup-in-damon_commit_target_regions.patch
mm-damon-sysfs-split-probe-setup-function-out.patch
mm-damon-sysfs-split-out-filters-setup-function.patch
mm-damon-sysfs-fix-typos-in-probe_addrm_dirs-s-attr-probe.patch
mm-damon-core-introduce-damon_nr_accesses_mvsum.patch
mm-damon-tests-core-kunit-test-damon_mvsum.patch
mm-damon-core-always-update-last_nr_accesses-for-intervals-change.patch
mm-damon-core-handle-unreset-nr_accesses-in-damon_nr_accesses_mvsum.patch
mm-damon-core-use-damon_nr_accesses_mvsum-in-__damos_valid_target.patch
mm-damon-core-use-damon_nr_accesses_mvsum-for-damos-region-tracing.patch
mm-damon-sysfs-schemes-use-damon_nr_accesses_mvsum-for-damo-regions.patch
mm-damon-core-remove-damon_warn_fix_nr_accesses_corruption.patch
mm-damon-core-remove-damon_verify_reset_aggregated.patch
mm-damon-core-remove-damon_verify_merge_regions_of.patch
mm-damon-tests-core-kunit-remove-nr_accesses_bp-setup-and-tests.patch
selftests-damon-drgn_dump_damon_status-do-not-dump-nr_accesses_bp.patch
mm-damon-core-remove-nr_accesses_bp-setups-and-updates.patch
mm-damon-core-remove-attrs-param-from-damon_update_region_access_rate.patch
mm-damon-paddr-remove-attrs-param-from-__damon_pa_check_access.patch
mm-damon-vaddr-remove-attrs-param-from-__damon_va_check_access.patch
mm-damon-core-remove-damon_moving_sum-and-its-unit-test.patch
mm-damon-core-remove-damon_region-nr_accesses_bp.patch