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 865A43C6A5A for ; Tue, 10 Mar 2026 18:00:52 +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=1773165652; cv=none; b=DbiwjDlktzpKgBho7HV7VLbVaZJxOdzTSGi3SasUpne8Vh3EZ81fdnqhUW+xb9Yg7d36Z96x2jN9zkkAxfKJSmpFRATZ88AM0ObbprrNyJl4kSv/FYyJyN533B/9HD6DGmCnQK3rhXU8/EYtdUF+Ru7werAqocJK7r9PHl8N3tU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773165652; c=relaxed/simple; bh=LaA/tLwq/bJhKxg0RuGI268CUOfY2O/i/Dc4gizsKkM=; h=Date:To:From:Subject:Message-Id; b=XMyNMflQfuD22PUGL1kAB8BdkVEKSGVvTNmMKN1lUwb1XFkl62gMwEZGto2tUtTQOPG2ADi7BUC/nNVTzlm7z+k371sp7KpZDBBJIRrzNxoViseF4fSqG8ZDeo4F7RmA3P36zxxpN8jE44JhNVvTJPDhCPBvNi6nMBuGAMJG8XY= 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=2lVQ4S1z; 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="2lVQ4S1z" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4AF3AC19423; Tue, 10 Mar 2026 18:00:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1773165652; bh=LaA/tLwq/bJhKxg0RuGI268CUOfY2O/i/Dc4gizsKkM=; h=Date:To:From:Subject:From; b=2lVQ4S1ziGLSNH6zOOOkClrNauP7WKpaaQLhXKinZgHFZscTVhHNfk4FWx4lKl1x9 7huj4WReJ3QzOtpAyjpGVqwRhwU7R7xROEsMKKlbghz6hxSpsPopyTqeTV6RMk/QRm PZYJCxeo+3VWZlakOm6soDnCd4H88tsh13oOCy4M= Date: Tue, 10 Mar 2026 11:00:51 -0700 To: mm-commits@vger.kernel.org,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-damon-sysfs-schemes-implement-quotas-goal_tuner-file.patch added to mm-new branch Message-Id: <20260310180052.4AF3AC19423@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-schemes: implement quotas->goal_tuner file has been added to the -mm mm-new branch. Its filename is mm-damon-sysfs-schemes-implement-quotas-goal_tuner-file.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-schemes-implement-quotas-goal_tuner-file.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: mm/damon/sysfs-schemes: implement quotas->goal_tuner file Date: Mon, 9 Mar 2026 18:05:20 -0700 Add a new DAMON sysfs interface file, namely 'goal_tuner' under the DAMOS quotas directory. It is connected to the damos_quota->goal_tuner field. Users can therefore select their favorite goal-based quotas tuning algorithm by writing the name of the tuner to the file. Reading the file returns the name of the currently selected tuner. Link: https://lkml.kernel.org/r/20260310010529.91162-5-sj@kernel.org Signed-off-by: SeongJae Park Signed-off-by: Andrew Morton --- mm/damon/sysfs-schemes.c | 58 +++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) --- a/mm/damon/sysfs-schemes.c~mm-damon-sysfs-schemes-implement-quotas-goal_tuner-file +++ a/mm/damon/sysfs-schemes.c @@ -1488,6 +1488,7 @@ struct damon_sysfs_quotas { unsigned long sz; unsigned long reset_interval_ms; unsigned long effective_sz; /* Effective size quota in bytes */ + enum damos_quota_goal_tuner goal_tuner; }; static struct damon_sysfs_quotas *damon_sysfs_quotas_alloc(void) @@ -1610,6 +1611,58 @@ static ssize_t effective_bytes_show(stru return sysfs_emit(buf, "%lu\n", quotas->effective_sz); } +struct damos_sysfs_qgoal_tuner_name { + enum damos_quota_goal_tuner tuner; + char *name; +}; + +static struct damos_sysfs_qgoal_tuner_name damos_sysfs_qgoal_tuner_names[] = { + { + .tuner = DAMOS_QUOTA_GOAL_TUNER_CONSIST, + .name = "consist", + }, + { + .tuner = DAMOS_QUOTA_GOAL_TUNER_TEMPORAL, + .name = "temporal", + }, +}; + +static ssize_t goal_tuner_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_quotas *quotas = container_of(kobj, + struct damon_sysfs_quotas, kobj); + int i; + + for (i = 0; i < ARRAY_SIZE(damos_sysfs_qgoal_tuner_names); i++) { + struct damos_sysfs_qgoal_tuner_name *tuner_name; + + tuner_name = &damos_sysfs_qgoal_tuner_names[i]; + if (tuner_name->tuner == quotas->goal_tuner) + return sysfs_emit(buf, "%s\n", tuner_name->name); + } + return -EINVAL; +} + +static ssize_t goal_tuner_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_quotas *quotas = container_of(kobj, + struct damon_sysfs_quotas, kobj); + int i; + + for (i = 0; i < ARRAY_SIZE(damos_sysfs_qgoal_tuner_names); i++) { + struct damos_sysfs_qgoal_tuner_name *tuner_name; + + tuner_name = &damos_sysfs_qgoal_tuner_names[i]; + if (sysfs_streq(buf, tuner_name->name)) { + quotas->goal_tuner = tuner_name->tuner; + return count; + } + } + return -EINVAL; +} + static void damon_sysfs_quotas_release(struct kobject *kobj) { kfree(container_of(kobj, struct damon_sysfs_quotas, kobj)); @@ -1627,11 +1680,15 @@ static struct kobj_attribute damon_sysfs static struct kobj_attribute damon_sysfs_quotas_effective_bytes_attr = __ATTR_RO_MODE(effective_bytes, 0400); +static struct kobj_attribute damon_sysfs_quotas_goal_tuner_attr = + __ATTR_RW_MODE(goal_tuner, 0600); + static struct attribute *damon_sysfs_quotas_attrs[] = { &damon_sysfs_quotas_ms_attr.attr, &damon_sysfs_quotas_sz_attr.attr, &damon_sysfs_quotas_reset_interval_ms_attr.attr, &damon_sysfs_quotas_effective_bytes_attr.attr, + &damon_sysfs_quotas_goal_tuner_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_quotas); @@ -2718,6 +2775,7 @@ static struct damos *damon_sysfs_mk_sche .weight_sz = sysfs_weights->sz, .weight_nr_accesses = sysfs_weights->nr_accesses, .weight_age = sysfs_weights->age, + .goal_tuner = sysfs_quotas->goal_tuner, }; struct damos_watermarks wmarks = { .metric = sysfs_wmarks->metric, _ Patches currently in -mm which might be from sj@kernel.org are mm-damon-core-set-quota-score-histogram-with-core-filters.patch mm-damon-core-do-non-safe-region-walk-on-kdamond_apply_schemes.patch mm-damon-core-split-regions-for-min_nr_regions.patch mm-damon-vaddr-do-not-split-regions-for-min_nr_regions.patch mm-damon-test-core-kunit-add-damon_apply_min_nr_regions-test.patch mm-damon-add-config_damon_debug_sanity.patch mm-damon-core-add-damon_new_region-debug_sanity-check.patch mm-damon-core-add-damon_del_region-debug_sanity-check.patch mm-damon-core-add-damon_nr_regions-debug_sanity-check.patch mm-damon-core-add-damon_merge_two_regions-debug_sanity-check.patch mm-damon-core-add-damon_merge_regions_of-debug_sanity-check.patch mm-damon-core-add-damon_split_region_at-debug_sanity-check.patch mm-damon-core-add-damon_reset_aggregated-debug_sanity-check.patch mm-damon-tests-kunitconifg-enable-damon_debug_sanity.patch selftests-damon-config-enable-damon_debug_sanity.patch mm-damon-tests-core-kunit-add-a-test-for-damon_commit_ctx.patch docs-mm-damon-design-document-the-power-of-two-limitation-for-addr_unit.patch mm-damon-core-remove-damos_set_next_apply_sis-duplicates.patch mm-damon-core-use-time_before-for-next_apply_sis.patch mm-damon-core-use-time_after_eq-in-kdamond_fn.patch mm-damon-core-use-mult_frac.patch mm-damon-tests-core-kunit-add-a-test-for-damon_is_last_region.patch mm-damon-core-clarify-damon_set_attrs-usages.patch mm-damon-document-non-zero-length-damon_region-assumption.patch docs-admin-guide-mm-damn-lru_sort-fix-intervals-autotune-parameter-name.patch docs-mm-damon-maintainer-profile-use-flexible-review-cadence.patch docs-mm-damon-index-fix-typo-autoamted-automated.patch mm-damon-core-introduce-damos_quota_goal_tuner.patch mm-damon-core-allow-quota-goals-set-zero-effective-size-quota.patch mm-damon-core-introduce-damos_quota_goal_tuner_temporal.patch mm-damon-sysfs-schemes-implement-quotas-goal_tuner-file.patch docs-mm-damon-design-document-the-goal-based-quota-tuner-selections.patch docs-admin-guide-mm-damon-usage-document-goal_tuner-sysfs-file.patch docs-abi-damon-update-for-goal_tuner.patch mm-damon-tests-core-kunit-test-goal_tuner-commit.patch selftests-damon-_damon_sysfs-support-goal_tuner-setup.patch selftests-damon-drgn_dump_damon_status-support-quota-goal_tuner-dumping.patch selftests-damon-sysfspy-test-goal_tuner-commit.patch