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 462994AFE2A for ; Wed, 2 Sep 2026 22:42:02 +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=1788388929; cv=none; b=l/opKoDFUZdwDwGXrbRWoHL/RAsTsVBXK35I2M+klBZLhr/G+6aKla5mrE7KIYwnv7UTeH9QkMCTtwrughotBYRcfSfxYhlhQ8tPNUWqF5YBzDo4YzH9mRjkPWyqHufaHM+gSAGn2T8xZ+PDGbFtnYdh9pF2SpgWYUyma5qSiLc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788388929; c=relaxed/simple; bh=beSJKYivEMKN1VTbLwQOaXlHZTr82JqN4GnKmzUIC3c=; h=Date:To:From:Subject:Message-Id; b=uWAKqak/NS6mGi3gMC1k8/dNoGqfvAEFUnopQdOZSZOyh74YFKBJhJrI8qvwcNAmPiGJrAYqy/V+/zrYwtQD4TCLJNTE9xHEA5NFCzCgGDoiT7LGi/ZCh3hbZNSaaAd0JlHG5lHHjkn2IucfsAFMtEqdhNw1rWBXENfQSBmCRPU= 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=0HnEC5xP; 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="0HnEC5xP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B79C71F000E9; Wed, 2 Sep 2026 22:41:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1788388917; bh=O0t1eO+mzLJzwNoiUo/trh0ubSkB+wIzJP5jKzzwzy8=; h=Date:To:From:Subject; b=0HnEC5xPtSGMImcjC8d2618G6iianZUznMBa3GkHJZAZvZBSFJJ47Mbdb2vXcxXQr /rtG+2YUvl68sJJdVdHCkKy9A7CMRHfhL1E7mMjtpK+i4blUnUYXNxOwktN0E6FPT1 E/zSSV9DJcNroZwkRNJlewWwoxiEYDe+wYSrJl2w= Date: Wed, 02 Sep 2026 15:41:57 -0700 To: mm-commits@vger.kernel.org,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-damon-core-use-damon_nr_samples_per_aggr-for-max-merge-threshold.patch added to mm-new branch Message-Id: <20260902224157.B79C71F000E9@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/core: use damon_nr_samples_per_aggr() for max merge threshold has been added to the -mm mm-new branch. Its filename is mm-damon-core-use-damon_nr_samples_per_aggr-for-max-merge-threshold.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-use-damon_nr_samples_per_aggr-for-max-merge-threshold.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 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/core: use damon_nr_samples_per_aggr() for max merge threshold Date: Tue, 1 Sep 2026 22:47:34 -0700 Patch series "mm/damon: cleanup code, add test cases, and update guidances in docs". Misc cleanup, improvements and updates of code, test, and documents. Patches 1-5 cleanup DAMON code. Patches 6-10 adds kunit and selftest test cases for recently fixed bugs and a new feature. Patches 11 and 12 update guidelines for AI review and what document to read, on DAMON documents. This patch (of 12): kdamond_merge_regions() open-codes max region merge threshold calculation. What it does is fundamentally the same as damon_nr_samples_per_aggr() but missing a few corner cases. The unhandled corner cases should be rare and make only a negligible level of monitoring results degradation. But having the inconsistency could increase future maintenance burden. Use the dedicated function. Link: https://lore.kernel.org/20260902054747.99370-1-sj@kernel.org Link: https://lore.kernel.org/20260902054747.99370-2-sj@kernel.org Signed-off-by: SJ Park Cc: Brendan Higgins Cc: David Gow Cc: David Hildenbrand Cc: Jonathan Corbet Cc: Liam R. Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Mike Rapoport Cc: Randy Dunlap Cc: Shuah Khan Cc: Suren Baghdasaryan Cc: Vlastimil Babka Cc: Kunwu Chan Signed-off-by: Andrew Morton --- mm/damon/core.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/mm/damon/core.c~mm-damon-core-use-damon_nr_samples_per_aggr-for-max-merge-threshold +++ a/mm/damon/core.c @@ -3506,8 +3506,7 @@ static void kdamond_merge_regions(struct unsigned int max_thres; bool count_age = true; - max_thres = c->attrs.aggr_interval / - (c->attrs.sample_interval ? c->attrs.sample_interval : 1); + max_thres = damon_nr_samples_per_aggr(&c->attrs); while (true) { nr_regions = 0; damon_for_each_target(t, c) { _ Patches currently in -mm which might be from sj@kernel.org are 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