From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 262843BB134 for ; Thu, 10 Sep 2026 21:30:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789075853; cv=none; b=P3SXGlHAGEupXMIgBCJigyzYtgGpWAGZBZylxvP8D6MEEa+06gvIXJXF0RR7UX4o0xl0v+/zcC2S8nIK1uQm2PK32v2zNnRix64yMuF6+l9/1HKcSztI4FNqqfJUoKFIPxWhUlNiN6GKgDxV4H0RnPXdYHhqcZ7h1ejupL0b4VA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789075853; c=relaxed/simple; bh=+R3Ajgo2AvvImRxNH0mOEzVjO6tn/QvvPoA9BqHCZeU=; h=Date:To:From:Subject:Message-Id; b=dKfxOWPmMkOSovWS0xblUNTZsbkWQSm1zXiREeXaUjsPay1IdcSq8Gi8K4kd4saTe3BM2E9w3IitdgV8Fwmtyh501lLgazOe9QqcZyfHt8AeXT+SOftvNGJxurSVdsqZ+W+1Mp92DniMdwcUhlmQjTcsXzrflrklR9J/+uzvHDI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=K/x2KjNH; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="K/x2KjNH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8F8551F000FF; Thu, 10 Sep 2026 21:30:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1789075851; bh=LX/ITQvswG27GSMVq7yY9M69X8EOtTehKAZdRdQeYF0=; h=Date:To:From:Subject; b=K/x2KjNHH/tXbMMdvSKftlzR2VSsxZb0AykWGf1LwsDExyzduaHovipYwqSRqT74G vPSgxivsp/cNpKT43I0ln7ZOjQfm6Jo4V7VPcHbrLqPX6CYKzYgpVU1XyqgxBqTOh2 jyCtFJYf2c61Xa4fJzmlY8d2jMS5/gvLAIhopgCo= Date: Thu, 10 Sep 2026 14:30:51 -0700 To: mm-commits@vger.kernel.org,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-damon-api-introduce-damon_filter_type_pgidle_set.patch added to mm-nonmm-unstable branch Message-Id: <20260910213051.8F8551F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/damon/api: introduce DAMON_FILTER_TYPE_PGIDLE_SET has been added to the -mm mm-nonmm-unstable branch. Its filename is mm-damon-api-introduce-damon_filter_type_pgidle_set.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_pgidle_set.patch This patch will later appear in the mm-nonmm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: SJ Park Subject: mm/damon/api: introduce DAMON_FILTER_TYPE_PGIDLE_SET Date: Thu, 10 Sep 2026 07:22:28 -0700 Patch series "mm/damon: introduce pgidle_set probe filter type". Users can do effective access monitoring with DAMON, using set_pgidle probe prep operation and pgidle_unset allowing probe filter. In the setup, high probe_hits means the region was accessed frequently. Zero probe_hits means the region was not accessed. The filter, however, matches only the memory that can show the idleness. Regions of zero probe_hits may contain memory that was just unable to show the idleness. On virtual address space based monitoring, for example, non-present pages are reported as cold. It is truly cold, but if the purpose is to make some operations like reclaiming or compressing the data, this is not really useful. Introduce a new probe filter type, pgidle_set, that confirms the page is marked as idle. Using it instead of pgidle_unset, users can find cold pages that can effectively be processed. Patch 1 introduces the pgidle_set probe filter type to DAMON kernel API. Patches 2 and 3 add support for it on physical and virtual address space operation sets, respectively. Patch 4 adds support for it on the DAMON sysfs interface. Finally, patch 5 updates the documentation for the new filter type. This patch (of 5): DAMON_FILTER_TYPE_PGIDLE_UNSET matches only memory that was able to confirm if it is marked as idle. If the memory cannot be marked as idle, it simply doesn't match. Hence, finding memory that was marked as idle with only DAMON_FILTER_TYPE_PGIDLE_UNSET is impossible. Introduce a new filter for the purpose, DAMON_FILTER_TYPE_PGIDLE_SET. Link: https://lore.kernel.org/20260910142234.171562-1-sj@kernel.org Link: https://lore.kernel.org/20260910142234.171562-2-sj@kernel.org Signed-off-by: SJ Park Cc: David Hildenbrand Cc: Jonathan Corbet Cc: Liam R. Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Mike Rapoport Cc: Randy Dunlap Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- include/linux/damon.h | 2 ++ 1 file changed, 2 insertions(+) --- a/include/linux/damon.h~mm-damon-api-introduce-damon_filter_type_pgidle_set +++ a/include/linux/damon.h @@ -774,11 +774,13 @@ struct damon_prep { * @DAMON_FILTER_TYPE_ANON: Anonymous pages. * @DAMON_FILTER_TYPE_MEMCG: Specific memcg's pages. * @DAMON_FILTER_TYPE_PGIDLE_UNSET: Pgidle is unset. + * @DAMON_FILTER_TYPE_PGIDLE_SET: Pgidle is set. */ enum damon_filter_type { DAMON_FILTER_TYPE_ANON, DAMON_FILTER_TYPE_MEMCG, DAMON_FILTER_TYPE_PGIDLE_UNSET, + DAMON_FILTER_TYPE_PGIDLE_SET, }; /** _ 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-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