From: Andrew Morton <akpm@linux-foundation.org>
To: mm-commits@vger.kernel.org,vbabka@kernel.org,surenb@google.com,rppt@kernel.org,rdunlap@infradead.org,mhocko@suse.com,ljs@kernel.org,liam@infradead.org,david@kernel.org,corbet@lwn.net,sj@kernel.org,akpm@linux-foundation.org
Subject: [merged mm-stable] mm-damon-core-extend-probe_hits_wsum-for-moving-sum-based-calculation.patch removed from -mm tree
Date: Thu, 08 Oct 2026 22:59:10 -0700 [thread overview]
Message-ID: <20261009055911.3D1901F00893@smtp.kernel.org> (raw)
The quilt patch titled
Subject: mm/damon/core: extend probe_hits_wsum() for moving sum based calculation
has been removed from the -mm tree. Its filename was
mm-damon-core-extend-probe_hits_wsum-for-moving-sum-based-calculation.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: SJ Park <sj@kernel.org>
Subject: mm/damon/core: extend probe_hits_wsum() for moving sum based calculation
Date: Fri, 11 Sep 2026 06:55:04 -0700
damon_probe_hits_wsum() is being called only in aggregation time. In
future, it could also be used by DAMOS. In this case, since DAMOS uses
its own apply_interval, it could be called in sampling time. Then using
the not yet fully aggregated probe_hits could result in suboptimum
outcomes. Extend damon_probe_hits_wsum() to get the weighted sum based on
moving sum to prepare the DAMOS usage.
Link: https://lore.kernel.org/20260911135510.96914-3-sj@kernel.org
Signed-off-by: SJ Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
---
include/linux/damon.h | 2 +-
mm/damon/core.c | 8 ++++++--
mm/damon/paddr.c | 2 +-
mm/damon/vaddr.c | 2 +-
4 files changed, 9 insertions(+), 5 deletions(-)
--- a/include/linux/damon.h~mm-damon-core-extend-probe_hits_wsum-for-moving-sum-based-calculation
+++ a/include/linux/damon.h
@@ -1075,7 +1075,7 @@ unsigned int damon_nr_accesses_mvsum(str
struct damon_ctx *ctx);
unsigned char damon_probe_hits_mvsum(int probe_idx, struct damon_region *r,
struct damon_ctx *ctx);
-unsigned int damon_probe_hits_wsum(struct damon_region *r, bool last,
+unsigned int damon_probe_hits_wsum(struct damon_region *r, bool last, bool mv,
struct damon_ctx *ctx);
int damon_set_regions(struct damon_target *t, struct damon_addr_range *ranges,
--- a/mm/damon/core.c~mm-damon-core-extend-probe_hits_wsum-for-moving-sum-based-calculation
+++ a/mm/damon/core.c
@@ -469,11 +469,12 @@ static bool damon_is_last_region(struct
* damon_probe_hits_wsum() - Returns probe hits weighted sum of a region.
* @r: region to get the weighted sum of.
* @last: if the request is for last-window aggregated probe hits.
+ * @mv: use moving sum.
* @ctx: context of &r.
*
* Return: the weighted sum of probe hits of the region.
*/
-unsigned int damon_probe_hits_wsum(struct damon_region *r, bool last,
+unsigned int damon_probe_hits_wsum(struct damon_region *r, bool last, bool mv,
struct damon_ctx *ctx)
{
struct damon_probe *probe;
@@ -483,6 +484,9 @@ unsigned int damon_probe_hits_wsum(struc
damon_for_each_probe(probe, ctx) {
if (last)
sum += r->last_probe_hits[i++] * probe->weight;
+ else if (mv)
+ sum += damon_probe_hits_mvsum(i++, r, ctx) *
+ probe->weight;
else
sum += r->probe_hits[i++] * probe->weight;
}
@@ -3472,7 +3476,7 @@ static unsigned int damon_merge_score(st
struct damon_ctx *ctx, bool use_probe_hits)
{
if (use_probe_hits)
- return damon_probe_hits_wsum(r, last, ctx);
+ return damon_probe_hits_wsum(r, last, false, ctx);
if (last)
return r->last_nr_accesses;
return r->nr_accesses;
--- a/mm/damon/paddr.c~mm-damon-core-extend-probe_hits_wsum-for-moving-sum-based-calculation
+++ a/mm/damon/paddr.c
@@ -208,7 +208,7 @@ static unsigned int damon_pa_apply_probe
folio_put(folio);
if (return_max_wsum)
max_wsum = max(damon_probe_hits_wsum(r, false,
- ctx), max_wsum);
+ false, ctx), max_wsum);
}
}
return max_wsum;
--- a/mm/damon/vaddr.c~mm-damon-core-extend-probe_hits_wsum-for-moving-sum-based-calculation
+++ a/mm/damon/vaddr.c
@@ -711,7 +711,7 @@ static unsigned int damon_va_apply_probe
__damon_va_apply_probes(ctx, mm, r);
if (return_max_wsum)
max_wsum = max(damon_probe_hits_wsum(r, false,
- ctx), max_wsum);
+ false, ctx), max_wsum);
}
if (mm)
mmput(mm);
_
Patches currently in -mm which might be from sj@kernel.org are
mm-damon-sysfs-schemes-read-sysfs_filter-addr_range-only-once.patch
mm-damon-sysfs-schemes-read-sysfs_filter-sz_range-only-once.patch
mm-damon-core-return-an-error-from-damos_commit_filter_arg.patch
mm-damon-core-disallow-max-min-damos-filter-range-arguments-commit.patch
mm-damon-sysfs-schemes-drop-centralized-filter-range-arg-validations.patch
mm-damon-sysfs-schemes-use-switch-case-in-add_scheme_filters.patch
mm-damon-core-kunit-extend-damos_commit_filter_for-for-wrong-input.patch
mm-damon-core-kunit-test-invalid-damos-filter-commits.patch
mm-damon-api-introduce-damon_filter_type_hugepage_size.patch
mm-damon-core-commit-hugepage_size-type-damon-filter.patch
mm-damon-ops-common-support-hugepage_size-damon-filter-matching.patch
mm-damon-sysfs-add-minmax-files-under-probe-filter-directory.patch
mm-damon-sysfs-support-hugepage_size-probe-filter.patch
docs-mm-damon-design-update-for-hugepage_size-probe-filter.patch
docs-admin-guide-mm-damon-usage-update-for-hugepage_size.patch
docs-abi-damon-update-for-hugepage_size-probe-filter.patch
mm-damon-api-remove-nr_damos_filter_types.patch
mm-damon-core-use-abs_diff-in-damon_feed_loop_next_input.patch
mm-damon-core-use-mult_frac-in-damon_feed_loop_next_input.patch
mm-damon-core-set-damon_ctx-walk_control_obsolete-in-damon_new_ctx.patch
mm-damon-core-document-damon_call-damon_start-race-hang-issue.patch
mm-damon-paddr-remove-pa-parameter-from-damon_pa_filter_pass.patch
mm-damon-tests-core-kunit-test-eligible_mem_bp-commitment.patch
mm-damon-tests-core-kunit-add-probe_hits_wsum-damos-filter-commit-test.patch
selftests-damon-sysfs_memcg_path_leak-fail-only-for-real-damon-leak.patch
docs-mm-damon-design-clarify-bp-is-basis-point.patch
mm-damon-core-introduce-damos_quota_goal-complement.patch
mm-damon-core-add-complement-argument-to-damos_new_quota_goal.patch
mm-damon-sysfs-schemes-support-quota-goal-complement-flag.patch
mm-damon-tests-core-kunit-test-quota_goal-complement-commit.patch
selftests-damon-sysfssh-test-quota-goal-complement-flag-file.patch
docs-mm-damon-design-document-damos-quota-goal-complement-flag.patch
docs-admin-guide-mm-damon-usage-update-for-quota-goal-complement-file.patch
docs-abi-damon-update-for-quota-goal-metric-complement-sysfs-file.patch
reply other threads:[~2026-10-09 5:59 UTC|newest]
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