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-rw-r--r--include/linux/damon.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/damon.h b/include/linux/damon.h
index 986b8c902585..2bb43910e22e 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -236,6 +236,8 @@ enum damos_quota_goal_tuner {
* @goals: Head of quota tuning goals (&damos_quota_goal) list.
* @goal_tuner: Goal-based @esz tuning algorithm to use.
* @esz: Effective size quota in bytes.
+ * @fail_charge_num: Failed regions charge rate numerator.
+ * @fail_charge_denom: Failed regions charge rate denominator.
*
* @weight_sz: Weight of the region's size for prioritization.
* @weight_nr_accesses: Weight of the region's nr_accesses for prioritization.
@@ -265,6 +267,10 @@ enum damos_quota_goal_tuner {
*
* The resulting effective size quota in bytes is set to @esz.
*
+ * For DAMOS action applying failed amount of regions, charging those same to
+ * those that the action has successfully applied may be unfair. For the
+ * reason, 'the size * @fail_charge_num / @fail_charge_denom' is charged.
+ *
* For selecting regions within the quota, DAMON prioritizes current scheme's
* target memory regions using the &struct damon_operations->get_scheme_score.
* You could customize the prioritization logic by setting &weight_sz,
@@ -279,6 +285,9 @@ struct damos_quota {
enum damos_quota_goal_tuner goal_tuner;
unsigned long esz;
+ unsigned int fail_charge_num;
+ unsigned int fail_charge_denom;
+
unsigned int weight_sz;
unsigned int weight_nr_accesses;
unsigned int weight_age;