* + mm-damon-api-introduce-damon_filter_type_hugepage_size.patch added to mm-new branch
@ 2026-09-15 23:39 Andrew Morton
0 siblings, 0 replies; only message in thread
From: Andrew Morton @ 2026-09-15 23:39 UTC (permalink / raw)
To: mm-commits, sj, akpm
The patch titled
Subject: mm/damon/api: introduce DAMON_FILTER_TYPE_HUGEPAGE_SIZE
has been added to the -mm mm-new branch. Its filename is
mm-damon-api-introduce-damon_filter_type_hugepage_size.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-api-introduce-damon_filter_type_hugepage_size.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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------------------------------------------------------
From: SJ Park <sj@kernel.org>
Subject: mm/damon/api: introduce DAMON_FILTER_TYPE_HUGEPAGE_SIZE
Date: Tue, 15 Sep 2026 07:33:50 -0700
Patch series "mm/damon: introduce hugepage_size probe filter".
Knowing whether a given memory is backed by a hugepage of specific size
is useful for efficient utilization of hugepages. For easy monitoring
of the information, introduce a new data attribute probe filter type,
hugepage_size. It works similar to the DAMOS filter of the same name.
It works for memory that is backed by a hugepage of a given size range.
Patch 1 introduces the new probe filter type to DAMON API and extends
related data structures. Patch 2 updates probe filter commit logic to
handle the size range. Patch 3 Updates the filtering logic to support
the new type. Patch 4 adds new DAMON sysfs files for the size range.
Patch 5 updates DAMON sysfs interface to fully support the new filter
type. Patches 6-8 updates design, usage and ABI documents for the new
feature.
This patch (of 8):
Introduce a new data attribute probe filter type, hugepage_size. It will
work for memory that is backed by a hugepage of a given size range. Add a
new damon_filter_type enum DAMON_FILTER_TYPE_HUGEPAGE_SIZE to identify the
type. Add two new fields in the damon_filter struct for saving the size
range.
Link: https://lore.kernel.org/20260915143359.91472-1-sj@kernel.org
Link: https://lore.kernel.org/20260915143359.91472-2-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: 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: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
---
include/linux/damon.h | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/include/linux/damon.h~mm-damon-api-introduce-damon_filter_type_hugepage_size
+++ a/include/linux/damon.h
@@ -783,12 +783,14 @@ struct damon_prep {
* @DAMON_FILTER_TYPE_MEMCG: Specific memcg's pages.
* @DAMON_FILTER_TYPE_PGIDLE_UNSET: Pgidle is unset.
* @DAMON_FILTER_TYPE_PGIDLE_SET: Pgidle is set.
+ * @DAMON_FILTER_TYPE_HUGEPAGE_SIZE: Page is part of a hugepage.
*/
enum damon_filter_type {
DAMON_FILTER_TYPE_ANON,
DAMON_FILTER_TYPE_MEMCG,
DAMON_FILTER_TYPE_PGIDLE_UNSET,
DAMON_FILTER_TYPE_PGIDLE_SET,
+ DAMON_FILTER_TYPE_HUGEPAGE_SIZE,
};
/**
@@ -798,6 +800,8 @@ enum damon_filter_type {
* @matching: Whether this filter is for the type-matching ones.
* @allow: Whether the @type-@matching ones should pass this filter.
* @memcg_id: Memcg id of the question if @type is DAMON_FILTER_MEMCG.
+ * @range_min: Minimum value of range arguments.
+ * @range_max: Maximum value of range arguments.
*/
struct damon_filter {
enum damon_filter_type type;
@@ -805,6 +809,10 @@ struct damon_filter {
bool allow;
union {
u64 memcg_id;
+ struct {
+ unsigned long range_min;
+ unsigned long range_max;
+ };
};
/* private: */
/* Siblings list. */
_
Patches currently in -mm which might be from sj@kernel.org are
mm-damon-vaddr-avoid-hw-driven-pte-updates-during-damon_hugetlb_mkold.patch
mm-damon-core-reset-invalid-quota-charge_target_from.patch
mm-damon-core-skip-applying-scheme-if-region-split-for-quota-fails.patch
mm-damon-paddr-respect-folio-end-for-damos_stat.patch
mm-damon-paddr-respect-folio-end-for-damos-actions-except-stat.patch
mm-damon-vaddr-respect-folio-end-for-damos_stat.patch
mm-damon-vaddr-respect-folio-end-for-damos_migrate_hotcold.patch
mm-damon-core-handle-extreme-memory-state-in-damon_get_node_mem_bp.patch
mm-damon-core-handle-extreme-memory-state-in-get_node_memcg_used_bp.patch
mm-damon-core-handle-extreme-memory-state-in-get_in_active_mem_bp.patch
mm-damon-core-introduce-damon_filter_type_pgidle_unset.patch
mm-damon-paddr-support-pgidle_unset-probe-filter-type.patch
mm-damon-sysfs-support-pgidle_unset-probe-filter-type.patch
docs-mm-damon-design-document-pgidle_unset-probe-filter-type.patch
mm-damon-core-introduce-damon_prep-struct.patch
mm-damon-core-commit-preps.patch
mm-damon-core-introduce-damon_operations-prep_probes.patch
mm-damon-paddr-support-damon_prep.patch
mm-damon-sysfs-implement-preps-directory.patch
mm-damon-sysfs-implement-preps-nr_preps-file.patch
mm-damon-sysfs-create-directories-for-nr_preps-writes.patch
mm-damon-sysfs-implement-prep_action-file.patch
mm-damon-sysfs-pass-preps-to-damon-core.patch
selftests-damon-sysfssh-test-probe-prep-sysfs-files.patch
docs-mm-damon-design-document-probe-preps.patch
docs-admin-guide-mm-damon-usage-document-probe-preps-sysfs-files.patch
docs-abi-damon-document-probe-prep-sysfs-files.patch
mm-damon-tests-core-kunit-test-committing-psi-goal-to-psi-goal.patch
mm-damon-core-handle-uninitialized-damos_quota_goal-last_psi_total.patch
mm-damon-core-copy-nid-for-eligible_mem_bp-damos-quota-goal-commit.patch
mm-damon-sysfs-set-next-refresh-jiffies-per-sysfs-context.patch
mm-damon-tests-core-kunit-test-damon_commit_filter.patch
mm-damon-tests-core-kunit-add-damon_commit_probes-test.patch
selftests-damon-_damon_sysfs-implement-damonprobes.patch
selftests-damon-drgn_dump_damon_status-dump-probes.patch
selftests-damon-sysfspy-extend-commit-assertion-function-for-probes.patch
selftests-damon-sysfspy-test-damon-probes.patch
mm-damon-core-use-damon_nr_samples_per_aggr-for-max-merge-threshold.patch
mm-damon-core-remove-debug-messages.patch
mm-damon-core-remove-debug-messages-fix.patch
mm-damon-vaddr-remove-a-debug-message.patch
mm-damon-core-validate-number-of-probes-in-valid_probe_params.patch
mm-damon-sysfs-remove-probes-number-validation.patch
mm-damon-tests-core-kunit-extend-set_regions-test-for-error-case.patch
mm-damon-tests-core-kunit-test-=0-size-damon_set_regions-inputs.patch
mm-damon-tests-core-kunit-test-overlapping-ranges-for-set_regions.patch
mm-damon-tests-core-kunit-test-damon_nr_samples_per_aggr.patch
selftests-damon-sysfssh-test-hugepage_mem_bp-quota-goal.patch
docs-mm-damon-maintainer-profile-update-ai-review-for-sashiko-replies.patch
docs-abi-damon-recommend-subsystem-doc-instead-of-admin-guide.patch
mm-damon-core-error-damos_commit_quota_goal-for-zero-target_value.patch
revert-mm-damon-lru_sort-error-out-for-10000-active_mem_bp.patch
revert-samples-damon-mtier-error-out-for-zero-quota-goal-target-values.patch
mm-damon-core-handle-null-ctx-parameter-in-damon_call.patch
mm-damon-core-set-ctx-call_controls_obsolete-in-damon_new_ctx.patch
mm-damon-reclaim-remove-unnecessary-damon_call-param-validation.patch
mm-damon-lru_sort-remove-unnecessary-damon_call-param-validation.patch
mm-damon-vaddr-support-prep_probes.patch
mm-damon-paddr-move-probe-filter-handling-to-ops-common.patch
mm-damon-vaddr-support-apply_probe.patch
mm-damon-vaddr-extend-apply_probes-for-hugetlb.patch
mm-damon-vaddr-support-pgidle_unset-probe-filter-type.patch
mm-damon-api-introduce-damon_filter_type_pgidle_set.patch
mm-damon-paddr-support-damon_filter_type_pgidle_set.patch
mm-damon-vaddr-support-damon_filter_type_pgidle_set.patch
mm-damon-sysfs-support-damon_filter_type_pgidle_set.patch
docs-mm-damon-design-update-for-pgidle_set-probe-filter.patch
mm-damon-api-introduce-damos_filter_type_probe_hits_wsum.patch
mm-damon-api-introduce-damos_filter_type_probe_hits_wsum-fix.patch
mm-damon-core-extend-probe_hits_wsum-for-moving-sum-based-calculation.patch
mm-damon-core-support-probe_hits_wsum-damos-core-filter.patch
mm-damon-sysfs-schemes-rename-sysfs_filter-sz_range-to-range_minmax.patch
mm-damon-sysfs-schemes-support-probe_hits_wsum-damos-core-filter.patch
docs-mm-damon-design-update-for-probe_hits_wsum-damos-core-filter.patch
docs-admin-guide-mm-damon-usage-update-for-probe_hits_wsum-damos-filter.patch
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
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