Btrfs: process the delayed reference queue in clusters

[deliverable/linux.git] / fs / btrfs / delayed-ref.h

diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h
index c345fee9f96be45401098a0e5b5ef6349d86e0e6..57153fcc347bbcc285c56ad6d96d84b61e180ef1 100644 (file)
--- a/fs/btrfs/delayed-ref.h
+++ b/fs/btrfs/delayed-ref.h
@@ -68,6 +68,8 @@ struct btrfs_delayed_ref_head {
         */
        struct mutex mutex;
 
+       struct list_head cluster;
+
        /*
         * when a new extent is allocated, it is just reserved in memory
         * The actual extent isn't inserted into the extent allocation tree
@@ -115,12 +117,20 @@ struct btrfs_delayed_ref_root {
         */
        unsigned long num_entries;
 
+       /* total number of head nodes in tree */
+       unsigned long num_heads;
+
+       /* total number of head nodes ready for processing */
+       unsigned long num_heads_ready;
+
        /*
         * set when the tree is flushing before a transaction commit,
         * used by the throttling code to decide if new updates need
         * to be run right away
         */
        int flushing;
+
+       u64 run_delayed_start;
 };
 
 static inline void btrfs_put_delayed_ref(struct btrfs_delayed_ref_node *ref)
@@ -140,9 +150,6 @@ int btrfs_add_delayed_ref(struct btrfs_trans_handle *trans,
 struct btrfs_delayed_ref_head *
 btrfs_find_delayed_ref_head(struct btrfs_trans_handle *trans, u64 bytenr);
 int btrfs_delayed_ref_pending(struct btrfs_trans_handle *trans, u64 bytenr);
-int btrfs_lock_delayed_ref(struct btrfs_trans_handle *trans,
-                          struct btrfs_delayed_ref_node *ref,
-                          struct btrfs_delayed_ref_head **next_ret);
 int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
                            struct btrfs_root *root, u64 bytenr,
                            u64 num_bytes, u32 *refs);
@@ -151,6 +158,10 @@ int btrfs_update_delayed_ref(struct btrfs_trans_handle *trans,
                          u64 parent, u64 orig_ref_root, u64 ref_root,
                          u64 orig_ref_generation, u64 ref_generation,
                          u64 owner_objectid, int pin);
+int btrfs_delayed_ref_lock(struct btrfs_trans_handle *trans,
+                          struct btrfs_delayed_ref_head *head);
+int btrfs_find_ref_cluster(struct btrfs_trans_handle *trans,
+                          struct list_head *cluster, u64 search_start);
 /*
  * a node might live in a head or a regular ref, this lets you
  * test for the proper type to use.