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 20A7C486B9A for ; Tue, 1 Sep 2026 17:18:02 +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=1788283083; cv=none; b=PSCMLoUYzLj9yF8VUF6oVSAbwDjV0ogLC3pIm5LubL+JhKw3rHyKnvbpeI61oMbtGvGUiUk5L1oh7qTza4DxU6fazBVuLvio6e3pJZtTTWq0hR5FI27Hd0tgkcBigu3g0TBIFV3e5tJfKXu9z0vQMlP2blLHZyO8JThmoNDPxK4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788283083; c=relaxed/simple; bh=yH95kb0jrRYQbo8wJOB4+dSZOXqSrXGqkCC43dDUVZg=; h=Date:To:From:Subject:Message-Id; b=USpNM9hDzyc3cFtCd3qrtxttQWGYkzJ0CbKEo7DmY5w71BoxKOu5GIQXopb/9ybqeWLa3EOUGNMhxOLoME0RRo8/c+ED0vYvEgFIx1GwVhiAGSlIrOfYEsXZCk1H9GxHJDLke/nif3SphhS7p5tuAAnqfy+TZ0FZyid06EIb73g= 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=x6kizOin; 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="x6kizOin" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EAC721F000E9; Tue, 1 Sep 2026 17:18:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1788283082; bh=5wnPm7XL+yL36pKxDVfjlBcidUkJUX1pPOH9jXQDm1Q=; h=Date:To:From:Subject; b=x6kizOinjmn+H3FZ/o61IVQPZpICggHgoClmSsAabmovugXrujtwe2vtlKg13LMWN ehMyELRPgFPF/3j9TqMjlE+nPi8kinc8fZYGQ5lKwVCG69r5Tmf9fticjtLwZM/+VV vZWuag8vTp+raIHrtwO3hs7oi2wo5qWAZImb7b20= Date: Tue, 01 Sep 2026 10:18:01 -0700 To: mm-commits@vger.kernel.org,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-damon-sysfs-pass-preps-to-damon-core.patch added to mm-new branch Message-Id: <20260901171801.EAC721F000E9@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/sysfs: pass preps to DAMON core has been added to the -mm mm-new branch. Its filename is mm-damon-sysfs-pass-preps-to-damon-core.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-sysfs-pass-preps-to-damon-core.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/sysfs: pass preps to DAMON core Date: Tue, 1 Sep 2026 06:25:00 -0700 DAMON sysfs interface provides the files for setting DAMON probe preps. But the underlying code is not really passing the user-set values to DAMON core. Pass those. Link: https://lore.kernel.org/20260901132506.99243-14-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 --- mm/damon/sysfs.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) --- a/mm/damon/sysfs.c~mm-damon-sysfs-pass-preps-to-damon-core +++ a/mm/damon/sysfs.c @@ -812,7 +812,10 @@ static ssize_t prep_action_store(struct action_name = &damon_sysfs_prep_action_names[i]; if (sysfs_streq(buf, action_name->name)) { + if (!mutex_trylock(&damon_sysfs_lock)) + return -EBUSY; prep->action = action_name->action; + mutex_unlock(&damon_sysfs_lock); ret = count; break; } @@ -2175,6 +2178,23 @@ static int damon_sysfs_set_attrs(struct return damon_set_attrs(ctx, &attrs); } +static int damon_sysfs_set_preps(struct damon_probe *probe, + struct damon_sysfs_preps *sys_preps) +{ + int i; + + for (i = 0; i < sys_preps->nr; i++) { + struct damon_sysfs_prep *sys_prep = sys_preps->preps_arr[i]; + struct damon_prep *prep; + + prep = damon_new_prep(sys_prep->action); + if (!prep) + return -ENOMEM; + damon_add_prep(probe, prep); + } + return 0; +} + static int damon_sysfs_set_filters(struct damon_probe *probe, struct damon_sysfs_filters *sys_filters) { @@ -2210,7 +2230,15 @@ static int damon_sysfs_set_probe(struct struct damon_sysfs_probe *sys_probe) { struct damon_sysfs_filters *sys_filters; + struct damon_sysfs_preps *sys_preps; + int err; + sys_preps = sys_probe->preps; + if (sys_preps) { + err = damon_sysfs_set_preps(probe, sys_preps); + if (err) + return err; + } sys_filters = sys_probe->filters; if (!sys_filters) return 0; _ 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