From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 5F72E22E004 for ; Mon, 17 Nov 2025 01:34:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763343248; cv=none; b=UpKFk9RONQvV0xiFSGwKFI6gdjGqwnMrqugNegttEp+wk/g12uTZUJRMb0I0JoXy+1UqcpGEKyfbl+P1EKpGcU+CG9Tg2dWyfuKUnUhpmw33FO7zTBkGwKvRX820tnH+/QO8kJ+SO1XKkY8VsDwDnij55bgmZpAGnaoA94gzT4A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763343248; c=relaxed/simple; bh=/QRrt2GGMxoZBcgv1xJvLfjCKZQ2j6OeqaU0Cj1mkk0=; h=Date:To:From:Subject:Message-Id; b=l+JgM8GM+oxrKi89FYur1EwAlnY6lWMeuhMV3sORNIMDbEMjQNZhs4VD877eqL4gdrKb55Pur96aBDWHtPSkmtYOQk9JR8xQtPlQAnLNVAJrq3m+3syTRZYs7Xy+RQwIuxfTRWde+mN/Our7HScN4893XMeHKINAKzhi+jQ/xhA= 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=baGugy3Y; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="baGugy3Y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CE685C116D0; Mon, 17 Nov 2025 01:34:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1763343245; bh=/QRrt2GGMxoZBcgv1xJvLfjCKZQ2j6OeqaU0Cj1mkk0=; h=Date:To:From:Subject:From; b=baGugy3YfHXkiGX+tynJJX9tRBeXRsrJWYplWO5zViMHWwIikiDFjA3k/4ICWYm/W NbDWJJIpakdGpy5G5r5nvrlzbIqcq9zIRLeO4uzoCBSbsa8uqTPRv9qZLiDNsO0Ugf 4gfb1AvE/CAlcoft9/O/9ELs0gYmzUh+ZgpC8ZYM= Date: Sun, 16 Nov 2025 17:34:05 -0800 To: mm-commits@vger.kernel.org,vbabka@suse.cz,surenb@google.com,rppt@kernel.org,mhocko@suse.com,lorenzo.stoakes@oracle.com,liam.howlett@oracle.com,david@redhat.com,corbet@lwn.net,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] docs-admin-guide-mm-damon-usage-document-empty-target-regions-commit-behavior.patch removed from -mm tree Message-Id: <20251117013405.CE685C116D0@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: Docs/admin-guide/mm/damon/usage: document empty target regions commit behavior has been removed from the -mm tree. Its filename was docs-admin-guide-mm-damon-usage-document-empty-target-regions-commit-behavior.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: SeongJae Park Subject: Docs/admin-guide/mm/damon/usage: document empty target regions commit behavior Date: Sun, 26 Oct 2025 11:22:09 -0700 Committing a monitoring target with empty target regions is for keeping the current monitoring results. This behavior was introduced by commit 973233600676 ("mm/damon/sysfs: update monitoring target regions for online input commit"). The behavior is not documented, though. Update the usage document for clarifying this behavior. Link: https://lkml.kernel.org/r/20251026182216.118200-5-sj@kernel.org Signed-off-by: SeongJae Park Cc: David Hildenbrand Cc: Jonathan Corbet Cc: Liam Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Mike Rapoport Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- Documentation/admin-guide/mm/damon/usage.rst | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) --- a/Documentation/admin-guide/mm/damon/usage.rst~docs-admin-guide-mm-damon-usage-document-empty-target-regions-commit-behavior +++ a/Documentation/admin-guide/mm/damon/usage.rst @@ -134,7 +134,8 @@ Users can write below commands for the k - ``on``: Start running. - ``off``: Stop running. - ``commit``: Read the user inputs in the sysfs files except ``state`` file - again. + again. Monitoring :ref:`target region ` inputs are also be + ignored if no target region is specified. - ``update_tuned_intervals``: Update the contents of ``sample_us`` and ``aggr_us`` files of the kdamond with the auto-tuning applied ``sampling interval`` and ``aggregation interval`` for the files. Please refer to @@ -289,6 +290,11 @@ In the beginning, this directory has onl number (``N``) to the file creates the number of child directories named ``0`` to ``N-1``. Each directory represents each initial monitoring target region. +If ``nr_regions`` is zero when committing new DAMON parameters online (writing +``commit`` to ``state`` file of :ref:`kdamond `), the commit +logic ignores the target regions. In other words, the current monitoring +results for the target are preserved. + .. _sysfs_region: regions// _ Patches currently in -mm which might be from sj@kernel.org are mm-damon-tests-core-kunit-remove-dynamic-allocs-on-damos_test_commit_filter.patch mm-damon-tests-core-kunit-split-out-damos_test_commit_filter-core-logic.patch mm-damon-tests-core-kunit-extend-damos_test_commit_filter_for-for-union-fields.patch mm-damon-tests-core-kunit-add-test-cases-to-damos_test_commit_filter.patch mm-damon-tests-core-kunit-add-damos_commit_quota_goal-test.patch mm-damon-tests-core-kunit-add-damos_commit_quota_goals-test.patch mm-damon-tests-core-kunit-add-damos_commit_quota-test.patch mm-damon-core-pass-migrate_dests-to-damos_commit_dests.patch mm-damon-tests-core-kunit-add-damos_commit_dests-test.patch mm-damon-tests-core-kunit-add-damos_commit-test.patch mm-damon-tests-core-kunit-add-damon_commit_target_regions-test.patch mm-damon-rename-damos-core-filter-helpers-to-have-word-core.patch mm-damon-rename-damos-filters-to-damos-core_filters.patch mm-damon-vaddr-cleanup-using-pmd_trans_huge_lock.patch mm-damon-vaddr-use-vm_normal_folio_pmd-instead-of-damon_get_folio.patch mm-damon-vaddr-consistently-use-only-pmd_entry-for-damos_migrate.patch mm-damon-tests-core-kunit-remove-damon_min_region-redefinition.patch selftests-damon-sysfspy-merge-damon-status-dumping-into-commitment-assertion.patch docs-mm-damon-maintainer-profile-fix-a-typo-on-mm-untable-link.patch docs-mm-damon-maintainer-profile-fix-grammartical-errors.patch