void lu_tgt_descs_fini(struct lu_tgt_descs *ltd);
int ltd_add_tgt(struct lu_tgt_descs *ltd, struct lu_tgt_desc *tgt);
void ltd_del_tgt(struct lu_tgt_descs *ltd, struct lu_tgt_desc *tgt);
-bool ltd_qos_is_usable(struct lu_tgt_descs *ltd);
int ltd_qos_penalties_calc(struct lu_tgt_descs *ltd);
int ltd_qos_update(struct lu_tgt_descs *ltd, struct lu_tgt_desc *tgt,
__u64 *total_wt);
+/**
+ * Whether MDT inode and space usages are balanced.
+ */
+static inline bool ltd_qos_is_balanced(struct lu_tgt_descs *ltd)
+{
+ return !test_bit(LQ_DIRTY, <d->ltd_qos.lq_flags) &&
+ test_bit(LQ_SAME_SPACE, <d->ltd_qos.lq_flags);
+}
+
+/**
+ * Whether QoS data is up-to-date and QoS can be applied.
+ */
+static inline bool ltd_qos_is_usable(struct lu_tgt_descs *ltd)
+{
+ if (ltd_qos_is_balanced(ltd))
+ return false;
+
+ if (ltd->ltd_lov_desc.ld_active_tgt_count < 2)
+ return false;
+
+ return true;
+}
+
static inline struct lu_tgt_desc *ltd_first_tgt(struct lu_tgt_descs *ltd)
{
int index;