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 A774117A2E8 for ; Wed, 29 Apr 2026 15:22:46 +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=1777476166; cv=none; b=sbS/YfmHBnoiZ4tpJsBrywKNIm6GRHXyc0o8R+kdAtYrLcpabIke9UgZWFcaLKn1DVyno9iGXO2lmvqs/4DU+ve+W3iYESlkfs1Bdb8iiPE/7YSKn1V/IBB5DxhJcgHQVHwRUUKvOJo2GSVC8AiaOfnK/ApwQAO05HSfxvElXiU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777476166; c=relaxed/simple; bh=979Q0X2ADg1tiwxrRyVIkKTIP8Faw90PDE042vGPIwY=; h=Date:To:From:Subject:Message-Id; b=XzpsH13GiKwYQhLLNneyQpr8zxdmLarP6tbaRo4RPQeVPGH0subUTC9EbmcZ0IsVOCbVWXGZilTMkjW3wWir76vHIh7d8PnkvPDB4Ye9YH4oFW11hnbHspuyAMIxDmhsnNGgfFzv8b36Sckedj+z363kipMNJ/iSc1QjxIvGr0k= 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=d0Njxbpv; 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="d0Njxbpv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3F765C19425; Wed, 29 Apr 2026 15:22:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1777476166; bh=979Q0X2ADg1tiwxrRyVIkKTIP8Faw90PDE042vGPIwY=; h=Date:To:From:Subject:From; b=d0Njxbpv8EN7fNCUjbw3xrjDGPzsn9D8Q5tLDBP5YXLOA261LvlFOR/12MmJcZ72x /yg3rQPiEIehcreBk//zZJh3m8fOZt0xOc9FUJoVuzkCnu9amfFZ7mODbQJz0M/Bj4 FYNCHuSMzWhtgVSHxSuAjSMXTg33aoQuEw2XOs8w= Date: Wed, 29 Apr 2026 08:22:45 -0700 To: mm-commits@vger.kernel.org,vbabka@kernel.org,surenb@google.com,rppt@kernel.org,mhocko@suse.com,ljs@kernel.org,liam@infradead.org,david@kernel.org,corbet@lwn.net,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + docs-admin-guide-mm-damon-usage-mark-scheme-filters-sysfs-dir-as-deprecated.patch added to mm-new branch Message-Id: <20260429152246.3F765C19425@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: Docs/admin-guide/mm/damon/usage: mark scheme filters sysfs dir as deprecated has been added to the -mm mm-new branch. Its filename is docs-admin-guide-mm-damon-usage-mark-scheme-filters-sysfs-dir-as-deprecated.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/docs-admin-guide-mm-damon-usage-mark-scheme-filters-sysfs-dir-as-deprecated.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: SeongJae Park Subject: Docs/admin-guide/mm/damon/usage: mark scheme filters sysfs dir as deprecated Date: Wed, 29 Apr 2026 08:03:05 -0700 Patch series "mm/damon/sysfs: document filters/ directory as deprecated". Commit ab71d2d30121 ("mm/damon/sysfs-schemes: let damon_sysfs_scheme_set_filters() be used for different named directories") introduced alternatives of 'filters' directory, namely core_filters/ and 'ops_filters/ directories. Now the alternatives are well stabilized and ready for all users. All filters/ directory use cases are expected to be able to be migrated to the alternatives. An LTS kernel having the alternatives, namely 6.18.y, is also released. Existence of filters/ directory is only confusing. It would be better not immediately removing the directory, though. There could be users that need time before migrating to the alternatives. There might be unexpected use cases that the alternatives cannot support. Doing the deprecation step by step across multiple years like DAMON debugfs deprecation would be safer. Start the deprecation changes by announcing the deprecation on the documents. Every year, one more action for completely removing the directory will be followed, like DAMON debugfs deprecation did. Following yearly actions are currently expected. In 2027, deprecation warning kernel messages will be printed once, for use of filters/ directory. In 2028, filters/ directory will be renamed to filters_DEPRECATED/. In 2029, filters_DEPRECATED/ directory will be removed. This patch (of 2): The alternatives of 'filters/' directory, namely 'core_filters/' and 'ops_filters/', can fully support all the features 'filters/' directory can do, and provide better user experience. Having 'filters/' directory is only confusing to users. Announce it as deprecated on the usage document. Link: https://lore.kernel.org/20260429150309.82282-1-sj@kernel.org Link: https://lore.kernel.org/20260429150309.82282-2-sj@kernel.org Signed-off-by: SeongJae Park Cc: David Hildenbrand Cc: Jonathan Corbet Cc: Liam R. 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, 4 insertions(+), 4 deletions(-) --- a/Documentation/admin-guide/mm/damon/usage.rst~docs-admin-guide-mm-damon-usage-mark-scheme-filters-sysfs-dir-as-deprecated +++ a/Documentation/admin-guide/mm/damon/usage.rst @@ -475,10 +475,10 @@ directory can be used for installing fil layers. Filters that requested by ``core_filters`` and ``ops_filters`` will be installed before those of ``filters``. All three directories have same files. -Use of ``filters`` directory can make expecting evaluation orders of given -filters with the files under directory bit confusing. Users are hence -recommended to use ``core_filters`` and ``ops_filters`` directories. The -``filters`` directory could be deprecated in future. +Use of ``filters`` directory can make filters evaluation orders confusing to +expect. For this reason, ``filters`` directory is deprecated. It is still +functioning, but is scheduled for removal in the near future. Users should use +``core_filters`` and ``ops_filters`` directories instead. In the beginning, the directory has only one file, ``nr_filters``. Writing a number (``N``) to the file creates the number of child directories named ``0`` _ Patches currently in -mm which might be from sj@kernel.org are mm-damon-sysfs-schemes-call-missing-mem_cgroup_iter_break.patch mm-damon-fix-damos_stat-tracepoint-format-for-sz_applied.patch docs-mm-damon-maintainer-profile-add-ai-review-usage-guideline.patch mm-damon-core-introduce-damon_ctx-paused.patch mm-damon-sysfs-add-pause-file-under-context-dir.patch docs-mm-damon-design-update-for-context-pause-resume-feature.patch docs-admin-guide-mm-damon-usage-update-for-pause-file.patch docs-abi-damon-update-for-pause-sysfs-file.patch mm-damon-tests-core-kunit-test-pause-commitment.patch selftests-damon-_damon_sysfs-support-pause-file-staging.patch selftests-damon-drgn_dump_damon_status-dump-pause.patch selftests-damon-sysfspy-check-pause-on-assert_ctx_committed.patch selftests-damon-sysfspy-pause-damon-before-dumping-status.patch mm-damon-introduce-damon_set_region_system_rams_default.patch mm-damon-reclaim-cover-all-system-rams.patch mm-damon-lru_sort-cover-all-system-rams.patch mm-damon-core-remove-damon_set_region_biggest_system_ram_default.patch mm-damon-stat-use-damon_set_region_system_rams_default.patch docs-admin-guide-mm-damon-reclaim-update-for-entire-memory-monitoring.patch docs-admin-guide-mm-damon-lru_sort-update-for-entire-memory-monitoring.patch docs-admin-guide-mm-damon-usage-mark-scheme-filters-sysfs-dir-as-deprecated.patch docs-abi-damon-mark-schemes-s-filters-deprecated.patch