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 832A0486E4D for ; Tue, 1 Sep 2026 17:18:06 +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=1788283087; cv=none; b=DkeuCyEYBxmDxiR8O2XeMCb0KAww2rgClPyEnE0NIiKckmCysuxefJ6Px9x75K+Dbrkkg1w0RBr6OXJqdCPwKds0BHN9o4sUaOqINA8GDrsOJbEfM2gldH49C6siA+rdiF+v9eYUMuFD12OxXhPU+31TaFC1EcVsdQa+0S/Oevg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788283087; c=relaxed/simple; bh=OJvq6kcVHl57FZmC5QIncD31S5wcoNLPDatlmWAlU+8=; h=Date:To:From:Subject:Message-Id; b=ihuWa975JTwgFpH363VHtDPG+NvoqbQGqXNERBLvgWOUK3VK88eDWVXY4IBu5tghjZ5g1r+yWHESNoMWBa/wByXdeTMF6Q/Ntdtw3tOgSNkwHcCgxW3U2EuxwXyLUpx6j28LnvshuFeTCsaGnMVd1DBI2/GqKLTUl5YkYdA+XMg= 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=Rm0oKyI9; 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="Rm0oKyI9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 112E01F00A3A; Tue, 1 Sep 2026 17:18:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1788283086; bh=SvQZbAgTCywqlySr/EAF1fRkyiny1xgxq13ofTE9BFA=; h=Date:To:From:Subject; b=Rm0oKyI9ro3gz27XlQdgYzeSCWnOEWO9peBRr8YQVhbDN0Esy89mGz1QrWIvMRXr7 pD0Iunxby1INMO1QIq0l+sdBMedRhZB2rd59Z9Tu9iTGZ4XBoMEpYCL4fq9KCfxExL oNjfJQ0yxeutmI34X02rFJbbkGKXc07uVUWcG5bw= Date: Tue, 01 Sep 2026 10:18:05 -0700 To: mm-commits@vger.kernel.org,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + docs-mm-damon-design-document-probe-preps.patch added to mm-new branch Message-Id: <20260901171806.112E01F00A3A@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: Docs/mm/damon/design: document probe preps has been added to the -mm mm-new branch. Its filename is docs-mm-damon-design-document-probe-preps.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/docs-mm-damon-design-document-probe-preps.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: Docs/mm/damon/design: document probe preps Date: Tue, 1 Sep 2026 06:25:02 -0700 Update DAMON design document for the newly added DAMON probe preps feature. Link: https://lore.kernel.org/20260901132506.99243-16-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: Shuah Khan Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- Documentation/mm/damon/design.rst | 7 +++++++ 1 file changed, 7 insertions(+) --- a/Documentation/mm/damon/design.rst~docs-mm-damon-design-document-probe-preps +++ a/Documentation/mm/damon/design.rst @@ -309,6 +309,13 @@ Users can therefore know how much of a g attribute by reading the per-region per-probe probe hits counter after each aggregation interval. +Users can optionally register probing preparation actions per probe. If such +actions are registered, DAMON applies the actions to each region's sampling +memory before starting the next sampling interval. Currently only one action, +``set_pgidle`` is supported. The action marks the page for the probing target +memory as access-idle. This can be useful to be used together with +``pgidle_unset`` probe filter. + This is a sampling based mechanism. Hence, it is lightweight but the output may include some measurement errors. The output should be used with good understanding of statistics. _ 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