mm-damon-core-implement-psi-metric-damos-quota-goal.patch removed from -mm tree

@@ -130,12 +130,14 @@ enum damos_action {
  * enum damos_quota_goal_metric - Represents the metric to be used as the goal
  *
  * @DAMOS_QUOTA_USER_INPUT:	User-input value.
+ * @DAMOS_QUOTA_SOME_MEM_PSI_US:	System level some memory PSI in us.
  * @NR_DAMOS_QUOTA_GOAL_METRICS:	Number of DAMOS quota goal metrics.
  *
  * Metrics equal to larger than @NR_DAMOS_QUOTA_GOAL_METRICS are unsupported.
  */
 enum damos_quota_goal_metric {
 	DAMOS_QUOTA_USER_INPUT,
+	DAMOS_QUOTA_SOME_MEM_PSI_US,
 	NR_DAMOS_QUOTA_GOAL_METRICS,
 };
 

@@ -144,6 +146,7 @@ enum damos_quota_goal_metric {
  * @metric:		Metric to be used for representing the goal.
  * @target_value:	Target value of @metric to achieve with the tuning.
  * @current_value:	Current value of @metric.
+ * @last_psi_total:	Last measured total PSI
  * @list:		List head for siblings.
  *
  * Data structure for getting the current score of the quota tuning goal.  The

@@ -159,6 +162,10 @@ struct damos_quota_goal {
 	enum damos_quota_goal_metric metric;
 	unsigned long target_value;
 	unsigned long current_value;
+	/* metric-dependent fields */
+	union {
+		u64 last_psi_total;
+	};
 	struct list_head list;
 };
 

@@ -11,6 +11,7 @@
 #include <linux/delay.h>
 #include <linux/kthread.h>
 #include <linux/mm.h>
+#include <linux/psi.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 

@@ -1125,6 +1126,25 @@ static unsigned long damon_feed_loop_nex
 	return min_input;
 }
 
+#ifdef CONFIG_PSI
+
+static u64 damos_get_some_mem_psi_total(void)
+{
+	if (static_branch_likely(&psi_disabled))
+		return 0;
+	return div_u64(psi_system.total[PSI_AVGS][PSI_MEM * 2],
+			NSEC_PER_USEC);
+}
+
+#else	/* CONFIG_PSI */
+
+static inline u64 damos_get_some_mem_psi_total(void)
+{
+	return 0;
+};
+
+#endif	/* CONFIG_PSI */
+
 static void damos_set_quota_goal_current_value(struct damos_quota_goal *goal)
 {
 	u64 now_psi_total;

@@ -1133,6 +1153,11 @@ static void damos_set_quota_goal_current
 	case DAMOS_QUOTA_USER_INPUT:
 		/* User should already set goal->current_value */
 		break;
+	case DAMOS_QUOTA_SOME_MEM_PSI_US:
+		now_psi_total = damos_get_some_mem_psi_total();
+		goal->current_value = now_psi_total - goal->last_psi_total;
+		goal->last_psi_total = now_psi_total;
+		break;
 	default:
 		break;
 	}