The patch titled
Subject: mm/damon/sysfs-schemes: support PSI-based quota auto-tune
has been added to the -mm mm-unstable branch. Its filename is
mm-damon-sysfs-schemes-support-psi-based-quota-auto-tune.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-support-psi-based-quota-auto-tune.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/sysfs-schemes: support PSI-based quota auto-tune
Date: Mon, 19 Feb 2024 11:44:25 -0800
Extend DAMON sysfs interface to support the PSI-based quota auto-tuning by
adding a new file, 'target_metric' under the quota goal directory. Old
users don't get any behavioral changes since the default value of the
metric is 'user input'.
Link: https://lkml.kernel.org/r/20240219194431.159606-15-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/sysfs-schemes.c | 42 +++++++++++++++++++++++++++++++++++--
1 file changed, 40 insertions(+), 2 deletions(-)
--- a/mm/damon/sysfs-schemes.c~mm-damon-sysfs-schemes-support-psi-based-quota-auto-tune
+++ a/mm/damon/sysfs-schemes.c
@@ -826,15 +826,48 @@ static const struct kobj_type damon_sysf
struct damos_sysfs_quota_goal {
struct kobject kobj;
+ enum damos_quota_goal_metric metric;
unsigned long target_value;
unsigned long current_value;
};
+/* This should match with enum damos_action */
+static const char * const damos_sysfs_quota_goal_metric_strs[] = {
+ "user_input",
+ "some_mem_psi_us",
+};
+
static struct damos_sysfs_quota_goal *damos_sysfs_quota_goal_alloc(void)
{
return kzalloc(sizeof(struct damos_sysfs_quota_goal), GFP_KERNEL);
}
+static ssize_t target_metric_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ struct damos_sysfs_quota_goal *goal = container_of(kobj,
+ struct damos_sysfs_quota_goal, kobj);
+
+ return sysfs_emit(buf, "%s\n",
+ damos_sysfs_quota_goal_metric_strs[goal->metric]);
+}
+
+static ssize_t target_metric_store(struct kobject *kobj,
+ struct kobj_attribute *attr, const char *buf, size_t count)
+{
+ struct damos_sysfs_quota_goal *goal = container_of(kobj,
+ struct damos_sysfs_quota_goal, kobj);
+ enum damos_quota_goal_metric m;
+
+ for (m = 0; m < NR_DAMOS_QUOTA_GOAL_METRICS; m++) {
+ if (sysfs_streq(buf, damos_sysfs_quota_goal_metric_strs[m])) {
+ goal->metric = m;
+ return count;
+ }
+ }
+ return -EINVAL;
+}
+
static ssize_t target_value_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
@@ -880,6 +913,9 @@ static void damos_sysfs_quota_goal_relea
kfree(container_of(kobj, struct damos_sysfs_quota_goal, kobj));
}
+static struct kobj_attribute damos_sysfs_quota_goal_target_metric_attr =
+ __ATTR_RW_MODE(target_metric, 0600);
+
static struct kobj_attribute damos_sysfs_quota_goal_target_value_attr =
__ATTR_RW_MODE(target_value, 0600);
@@ -887,6 +923,7 @@ static struct kobj_attribute damos_sysfs
__ATTR_RW_MODE(current_value, 0600);
static struct attribute *damos_sysfs_quota_goal_attrs[] = {
+ &damos_sysfs_quota_goal_target_metric_attr.attr,
&damos_sysfs_quota_goal_target_value_attr.attr,
&damos_sysfs_quota_goal_current_value_attr.attr,
NULL,
@@ -1899,11 +1936,12 @@ static int damos_sysfs_set_quota_score(
if (!sysfs_goal->target_value)
continue;
- goal = damos_new_quota_goal(DAMOS_QUOTA_USER_INPUT,
+ goal = damos_new_quota_goal(sysfs_goal->metric,
sysfs_goal->target_value);
if (!goal)
return -ENOMEM;
- goal->current_value = sysfs_goal->current_value;
+ if (sysfs_goal->metric == DAMOS_QUOTA_USER_INPUT)
+ goal->current_value = sysfs_goal->current_value;
damos_add_quota_goal(quota, goal);
}
return 0;
_
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
