int (*po_setup)(struct ldlm_pool *pl, int limit);
};
-/* One second for pools thread check interval. */
+/**
+ * One second for pools thread check interval. Each pool has own period.
+ */
#define LDLM_POOLS_THREAD_PERIOD (1)
-/* 5% margin for modest pools. See ldlm_pool.c for details. */
+/**
+ * 5% margin for modest pools. See ldlm_pool.c for details.
+ */
#define LDLM_POOLS_MODEST_MARGIN (5)
-/* A change to SLV in % after which we want to wake up pools thread asap. */
-#define LDLM_POOLS_FAST_SLV_CHANGE (50)
+/**
+ * Default recalc period for server side pools in sec.
+ */
+#define LDLM_POOL_SRV_DEF_RECALC_PERIOD (1)
+
+/**
+ * Default recalc period for client side pools in sec.
+ */
+#define LDLM_POOL_CLI_DEF_RECALC_PERIOD (10)
struct ldlm_pool {
/**
*/
time_t pl_recalc_time;
/**
+ * Recalc period for pool.
+ */
+ time_t pl_recalc_period;
+ /**
* Recalc and shrink ops.
*/
struct ldlm_pool_ops *pl_ops;
/**
- * Planned number of granted locks for next T.
+ * Number of planned locks for next period.
*/
int pl_grant_plan;
/**
- * Grant plan step for next T.
- */
- int pl_grant_step;
- /**
* Pool statistics.
*/
struct lprocfs_stats *pl_stats;
};
struct ldlm_lock {
- struct portals_handle l_handle; // must be first in the structure
- atomic_t l_refc;
-
- /* internal spinlock protects l_resource. we should hold this lock
- * first before grabbing res_lock.*/
- spinlock_t l_lock;
-
- /* ldlm_lock_change_resource() can change this */
- struct ldlm_resource *l_resource;
-
- /* protected by ns_hash_lock. FIXME */
- struct list_head l_lru;
-
- /* protected by lr_lock, linkage to resource's lock queues */
- struct list_head l_res_link;
-
- struct ldlm_interval *l_tree_node; /* tree node for ldlm_extent */
-
- /* protected by led_lock */
- struct list_head l_export_chain; // per-export chain of locks
-
- /* protected by lr_lock */
- ldlm_mode_t l_req_mode;
- ldlm_mode_t l_granted_mode;
-
+ /**
+ * Must be first in the structure.
+ */
+ struct portals_handle l_handle;
+ /**
+ * Lock reference count.
+ */
+ atomic_t l_refc;
+ /**
+ * Internal spinlock protects l_resource. we should hold this lock
+ * first before grabbing res_lock.
+ */
+ spinlock_t l_lock;
+ /**
+ * ldlm_lock_change_resource() can change this.
+ */
+ struct ldlm_resource *l_resource;
+ /**
+ * Protected by ns_hash_lock. List item for client side lru list.
+ */
+ struct list_head l_lru;
+ /**
+ * Protected by lr_lock, linkage to resource's lock queues.
+ */
+ struct list_head l_res_link;
+ /**
+ * Tree node for ldlm_extent.
+ */
+ struct ldlm_interval *l_tree_node;
+ /**
+ * Protected by per-bucket exp->exp_lock_hash locks. Per export hash
+ * of locks.
+ */
+ struct hlist_node l_exp_hash;
+ /**
+ * Protected by lr_lock. Requested mode.
+ */
+ ldlm_mode_t l_req_mode;
+ /**
+ * Granted mode, also protected by lr_lock.
+ */
+ ldlm_mode_t l_granted_mode;
+ /**
+ * Lock enqueue completion handler.
+ */
ldlm_completion_callback l_completion_ast;
+ /**
+ * Lock blocking ast handler.
+ */
ldlm_blocking_callback l_blocking_ast;
+ /**
+ * Lock glimpse handler.
+ */
ldlm_glimpse_callback l_glimpse_ast;
- struct obd_export *l_export;
- struct obd_export *l_conn_export;
+ /**
+ * Lock export.
+ */
+ struct obd_export *l_export;
+ /**
+ * Lock connection export.
+ */
+ struct obd_export *l_conn_export;
+
+ /**
+ * Remote lock handle.
+ */
+ struct lustre_handle l_remote_handle;
- struct lustre_handle l_remote_handle;
- ldlm_policy_data_t l_policy_data;
+ ldlm_policy_data_t l_policy_data;
- /* protected by lr_lock */
+ /*
+ * Protected by lr_lock. Various counters: readers, writers, etc.
+ */
__u32 l_flags;
__u32 l_readers;
__u32 l_writers;
__u8 l_destroyed;
- /* If the lock is granted, a process sleeps on this waitq to learn when
+ /**
+ * If the lock is granted, a process sleeps on this waitq to learn when
* it's no longer in use. If the lock is not granted, a process sleeps
- * on this waitq to learn when it becomes granted. */
+ * on this waitq to learn when it becomes granted.
+ */
cfs_waitq_t l_waitq;
+
struct timeval l_enqueued_time;
- cfs_time_t l_last_used; /* jiffies */
+ /**
+ * Jiffies. Should be converted to time if needed.
+ */
+ cfs_time_t l_last_used;
+
struct ldlm_extent l_req_extent;
- /* Client-side-only members */
- __u32 l_lvb_len; /* temporary storage for */
- void *l_lvb_data; /* an LVB received during */
- void *l_lvb_swabber; /* an enqueue */
+ /*
+ * Client-side-only members.
+ */
+
+ /**
+ * Temporary storage for an LVB received during an enqueue operation.
+ */
+ __u32 l_lvb_len;
+ void *l_lvb_data;
+ void *l_lvb_swabber;
+
void *l_ast_data;
spinlock_t l_extents_list_lock;
struct list_head l_extents_list;
struct list_head l_cache_locks_list;
- /* Server-side-only members */
+ /*
+ * Server-side-only members.
+ */
- /* protected by elt_lock */
- struct list_head l_pending_chain; /* callbacks pending */
- cfs_time_t l_callback_timeout; /* jiffies */
+ /**
+ * Protected by elt_lock. Callbacks pending.
+ */
+ struct list_head l_pending_chain;
- __u32 l_pid; /* pid which created this lock */
+ cfs_time_t l_callback_timeout;
- /* for ldlm_add_ast_work_item() */
+ /**
+ * Pid which created this lock.
+ */
+ __u32 l_pid;
+
+ /**
+ * For ldlm_add_ast_work_item().
+ */
struct list_head l_bl_ast;
+ /**
+ * For ldlm_add_ast_work_item().
+ */
struct list_head l_cp_ast;
+ /**
+ * For ldlm_add_ast_work_item().
+ */
+ struct list_head l_rk_ast;
+
struct ldlm_lock *l_blocking_lock;
int l_bl_ast_run;
- /* protected by lr_lock, linkages to "skip lists" */
+ /**
+ * Protected by lr_lock, linkages to "skip lists".
+ */
struct list_head l_sl_mode;
struct list_head l_sl_policy;
};
void *ei_cb_cp; /* lock completion callback */
void *ei_cb_gl; /* lock glimpse callback */
void *ei_cbdata; /* Data to be passed into callbacks. */
+ short ei_async:1; /* async request */
};
extern struct obd_ops ldlm_obd_ops;
void ldlm_revoke_export_locks(struct obd_export *exp);
int ldlm_get_ref(void);
void ldlm_put_ref(void);
+int ldlm_init_export(struct obd_export *exp);
+void ldlm_destroy_export(struct obd_export *exp);
/* ldlm_lock.c */
ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res);
void ldlm_pools_recalc(ldlm_side_t client);
int ldlm_pools_init(void);
void ldlm_pools_fini(void);
-void ldlm_pools_wakeup(void);
int ldlm_pool_init(struct ldlm_pool *pl, struct ldlm_namespace *ns,
int idx, ldlm_side_t client);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff