The patch titled
Subject: mm/damon/reclaim: implement user-feedback driven quota auto-tuning
has been added to the -mm mm-unstable branch. Its filename is
mm-damon-reclaim-implement-user-feedback-driven-quota-auto-tuning.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-reclaim-implement-user-feedback-driven-quota-auto-tuning.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: SeongJae Park <sj@xxxxxxxxxx>
Subject: mm/damon/reclaim: implement user-feedback driven quota auto-tuning
Date: Mon, 19 Feb 2024 11:44:29 -0800
DAMOS supports user-feedback driven quota auto-tuning, but only DAMON
sysfs interface is using it. Add support of the feature on DAMON_RECLAIM
by adding one more input parameter, namely 'quota_autotune_feedback', for
providing the user feedback to DAMON_RECLAIM. It assumes the target value
of the feedback is 10,000.
Link: https://lkml.kernel.org/r/20240219194431.159606-19-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/reclaim.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
--- a/mm/damon/reclaim.c~mm-damon-reclaim-implement-user-feedback-driven-quota-auto-tuning
+++ a/mm/damon/reclaim.c
@@ -62,6 +62,21 @@ static struct damos_quota damon_reclaim_
};
DEFINE_DAMON_MODULES_DAMOS_QUOTAS(damon_reclaim_quota);
+/*
+ * User-specifiable feedback for auto-tuning of the effective quota.
+ *
+ * While keeping the caps that set by other quotas, DAMON_RECLAIM automatically
+ * increases and decreases the effective level of the quota aiming receiving this
+ * feedback of value ``10,000`` from the user. DAMON_RECLAIM assumes the feedback
+ * value and the quota are positively proportional. Value zero means disabling
+ * this auto-tuning feature.
+ *
+ * Disabled by default.
+ *
+ */
+static unsigned long quota_autotune_feedback __read_mostly;
+module_param(quota_autotune_feedback, ulong, 0600);
+
static struct damos_watermarks damon_reclaim_wmarks = {
.metric = DAMOS_WMARK_FREE_MEM_RATE,
.interval = 5000000, /* 5 seconds */
@@ -159,11 +174,13 @@ static void damon_reclaim_copy_quota_sta
dst->charged_from = src->charged_from;
dst->charge_target_from = src->charge_target_from;
dst->charge_addr_from = src->charge_addr_from;
+ dst->esz_bp = src->esz_bp;
}
static int damon_reclaim_apply_parameters(void)
{
struct damos *scheme, *old_scheme;
+ struct damos_quota_goal *goal;
struct damos_filter *filter;
int err = 0;
@@ -180,6 +197,17 @@ static int damon_reclaim_apply_parameter
damon_reclaim_copy_quota_status(&scheme->quota,
&old_scheme->quota);
}
+
+ if (quota_autotune_feedback) {
+ goal = damos_new_quota_goal(DAMOS_QUOTA_USER_INPUT, 10000);
+ if (!goal) {
+ damon_destroy_scheme(scheme);
+ return -ENOMEM;
+ }
+ goal->current_value = quota_autotune_feedback;
+ damos_add_quota_goal(&scheme->quota, goal);
+ }
+
if (skip_anon) {
filter = damos_new_filter(DAMOS_FILTER_TYPE_ANON, true);
if (!filter) {
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
mm-damon-core-check-apply-interval-in-damon_do_apply_schemes.patch
mm-damon-sysfs-schemes-handle-schemes-sysfs-dir-removal-before-commit_schemes_quota_goals.patch
mm-damon-reclaim-fix-quota-stauts-loss-due-to-online-tunings.patch
mm-damon-lru_sort-fix-quota-status-loss-due-to-online-tunings.patch
docs-admin-guide-mm-damon-usage-use-sysfs-interface-for-tracepoints-example.patch
mm-damon-rename-config_damon_dbgfs-to-damon_dbgfs_deprecated.patch
mm-damon-dbgfs-implement-deprecation-notice-file.patch
mm-damon-dbgfs-make-debugfs-interface-deprecation-message-a-macro.patch
docs-admin-guide-mm-damon-usage-document-deprecated-file-of-damon-debugfs-interface.patch
selftets-damon-prepare-for-monitor_on-file-renaming.patch
mm-damon-dbgfs-rename-monitor_on-file-to-monitor_on_deprecated.patch
docs-admin-guide-mm-damon-usage-update-for-monitor_on-renaming.patch
docs-translations-damon-usage-update-for-monitor_on-renaming.patch
mm-damon-sysfs-handle-state-file-inputs-for-every-sampling-interval-if-possible.patch
selftests-damon-_damon_sysfs-support-damos-quota.patch
selftests-damon-_damon_sysfs-support-damos-stats.patch
selftests-damon-_damon_sysfs-support-damos-apply-interval.patch
selftests-damon-add-a-test-for-damos-quota.patch
selftests-damon-add-a-test-for-damos-apply-intervals.patch
selftests-damon-add-a-test-for-a-race-between-target_ids_read-and-dbgfs_before_terminate.patch
selftests-damon-add-a-test-for-the-pid-leak-of-dbgfs_target_ids_write.patch
selftests-damon-_chk_dependency-get-debugfs-mount-point-from-proc-mounts.patch
docs-mm-damon-maintainer-profile-fix-reference-links-for-mm-stable-tree.patch
docs-mm-damon-move-the-list-of-damos-actions-to-design-doc.patch
docs-mm-damon-move-damon-operation-sets-list-from-the-usage-to-the-design-document.patch
docs-mm-damon-move-monitoring-target-regions-setup-detail-from-the-usage-to-the-design-document.patch
docs-admin-guide-mm-damon-usage-fix-wrong-quotas-diabling-condition.patch
mm-damon-core-set-damos_quota-esz-as-public-field-and-document.patch
mm-damon-sysfs-schemes-implement-quota-effective_bytes-file.patch
mm-damon-sysfs-implement-a-kdamond-command-for-updating-schemes-effective-quotas.patch
docs-abi-damon-document-effective_bytes-sysfs-file.patch
docs-admin-guide-mm-damon-usage-document-effective_bytes-file.patch
mm-damon-move-comments-and-fields-for-damos-quota-prioritization-to-the-end.patch
mm-damon-core-split-out-quota-goal-related-fields-to-a-struct.patch
mm-damon-core-add-multiple-goals-per-damos_quota-and-helpers-for-those.patch
mm-damon-sysfs-use-only-quota-goals.patch
mm-damon-core-remove-goal-field-of-damos_quota.patch
mm-damon-core-let-goal-specified-with-only-target-and-current-values.patch
mm-damon-core-support-multiple-metrics-for-quota-goal.patch
mm-damon-core-implement-psi-metric-damos-quota-goal.patch
mm-damon-sysfs-schemes-support-psi-based-quota-auto-tune.patch
docs-mm-damon-design-document-quota-goal-self-tuning.patch
docs-abi-damon-document-quota-goal-metric-file.patch
docs-admin-guide-mm-damon-usage-document-quota-goal-metric-file.patch
mm-damon-reclaim-implement-user-feedback-driven-quota-auto-tuning.patch
mm-damon-reclaim-implement-memory-psi-driven-quota-self-tuning.patch
docs-admin-guide-mm-damon-reclaim-document-auto-tuning-parameters.patch
