struct rw_semaphore op_rw_sem; /* to protect lu_tgt_pool use */
};
-int tgt_pool_init(struct lu_tgt_pool *op, unsigned int count);
-int tgt_pool_add(struct lu_tgt_pool *op, __u32 idx, unsigned int min_count);
-int tgt_pool_remove(struct lu_tgt_pool *op, __u32 idx);
-int tgt_pool_free(struct lu_tgt_pool *op);
-int tgt_check_index(int idx, struct lu_tgt_pool *osts);
-int tgt_pool_extend(struct lu_tgt_pool *op, unsigned int min_count);
+int lu_tgt_pool_init(struct lu_tgt_pool *op, unsigned int count);
+int lu_tgt_pool_add(struct lu_tgt_pool *op, __u32 idx, unsigned int min_count);
+int lu_tgt_pool_remove(struct lu_tgt_pool *op, __u32 idx);
+int lu_tgt_pool_free(struct lu_tgt_pool *op);
+int lu_tgt_check_index(int idx, struct lu_tgt_pool *osts);
+int lu_tgt_pool_extend(struct lu_tgt_pool *op, unsigned int min_count);
/* bitflags used in rr / qos allocation */
enum lq_flag {
struct obd_uuid lsq_uuid; /* ptlrpc's c_remote_uuid */
struct list_head lsq_svr_list; /* link to lq_svr_list */
__u64 lsq_bavail; /* total bytes avail on svr */
- __u64 lsq_iavail; /* tital inode avail on svr */
+ __u64 lsq_iavail; /* total inode avail on svr */
__u64 lsq_penalty; /* current penalty */
__u64 lsq_penalty_per_obj; /* penalty decrease
* every obj*/
__u64 ltq_penalty; /* current penalty */
__u64 ltq_penalty_per_obj; /* penalty decrease
* every obj*/
+ __u64 ltq_avail; /* bytes/inode avail */
__u64 ltq_weight; /* net weighting */
time64_t ltq_used; /* last used time, seconds */
bool ltq_usable:1; /* usable for striping */
};
/* target descriptor */
+#define LOV_QOS_DEF_THRESHOLD_RR_PCT 17
+#define LMV_QOS_DEF_THRESHOLD_RR_PCT 5
+
+#define LOV_QOS_DEF_PRIO_FREE 90
+#define LMV_QOS_DEF_PRIO_FREE 90
+
struct lu_tgt_desc {
union {
struct dt_device *ltd_tgt;
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;