initial version of reference cache

diff -r eb4767aa190e ctree.c
@@ -165,7 +165,7 @@ int btrfs_copy_root(struct btrfs_trans_h
 	btrfs_clear_header_flag(cow, BTRFS_HEADER_FLAG_WRITTEN);
 
 	WARN_ON(btrfs_header_generation(buf) > trans->transid);
-	ret = btrfs_inc_ref(trans, new_root, buf);
+	ret = btrfs_inc_ref(trans, new_root, buf, 0);
 	kfree(new_root);
 
 	if (ret)

@@ -232,7 +232,7 @@ int __btrfs_cow_block(struct btrfs_trans
 	WARN_ON(btrfs_header_generation(buf) > trans->transid);
 	if (btrfs_header_generation(buf) != trans->transid) {
 		different_trans = 1;
-		ret = btrfs_inc_ref(trans, root, buf);
+		ret = btrfs_inc_ref(trans, root, buf, 1);
 		if (ret)
 			return ret;
 	} else {

diff -r eb4767aa190e ctree.h
@@ -592,6 +592,10 @@ struct btrfs_fs_info {
 	u64 last_alloc;
 	u64 last_data_alloc;
 
+	spinlock_t ref_cache_lock;
+	u64 total_ref_cache_size;
+	u64 running_ref_cache_size;
+
 	u64 avail_data_alloc_bits;
 	u64 avail_metadata_alloc_bits;
 	u64 avail_system_alloc_bits;

@@ -613,6 +617,8 @@ struct btrfs_root {
 	spinlock_t node_lock;
 
 	struct extent_buffer *commit_root;
+	struct btrfs_leaf_ref_tree *ref_tree;
+
 	struct btrfs_root_item root_item;
 	struct btrfs_key root_key;
 	struct btrfs_fs_info *fs_info;

@@ -1430,7 +1436,7 @@ int btrfs_reserve_extent(struct btrfs_tr
 				  u64 search_end, struct btrfs_key *ins,
 				  u64 data);
 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-		  struct extent_buffer *buf);
+		  struct extent_buffer *buf, int cache_ref);
 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
 		      *root, u64 bytenr, u64 num_bytes,
 		      u64 root_objectid, u64 ref_generation,

diff -r eb4767aa190e disk-io.c
@@ -716,6 +716,7 @@ static int __setup_root(u32 nodesize, u3
 	root->node = NULL;
 	root->inode = NULL;
 	root->commit_root = NULL;
+	root->ref_tree = NULL;
 	root->sectorsize = sectorsize;
 	root->nodesize = nodesize;
 	root->leafsize = leafsize;

@@ -1165,12 +1166,19 @@ static int transaction_kthread(void *arg
 		vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE);
 		mutex_lock(&root->fs_info->transaction_kthread_mutex);
 
+		printk("btrfs: total reference cache size %Lu\n",
+			root->fs_info->total_ref_cache_size);
+
 		mutex_lock(&root->fs_info->trans_mutex);
 		cur = root->fs_info->running_transaction;
 		if (!cur) {
 			mutex_unlock(&root->fs_info->trans_mutex);
 			goto sleep;
 		}
+
+		printk("btrfs: running reference cache size %Lu\n",
+			root->fs_info->running_ref_cache_size);
+
 		now = get_seconds();
 		if (now < cur->start_time || now - cur->start_time < 30) {
 			mutex_unlock(&root->fs_info->trans_mutex);

@@ -1233,6 +1241,7 @@ struct btrfs_root *open_ctree(struct sup
 	spin_lock_init(&fs_info->hash_lock);
 	spin_lock_init(&fs_info->delalloc_lock);
 	spin_lock_init(&fs_info->new_trans_lock);
+	spin_lock_init(&fs_info->ref_cache_lock);
 
 	init_completion(&fs_info->kobj_unregister);
 	fs_info->tree_root = tree_root;

@@ -1699,6 +1708,11 @@ int close_ctree(struct btrfs_root *root)
 		printk("btrfs: at unmount delalloc count %Lu\n",
 		       fs_info->delalloc_bytes);
 	}
+	if (fs_info->total_ref_cache_size) {
+		printk("btrfs: at umount reference cache size %Lu\n",
+			fs_info->total_ref_cache_size);
+	}
+	
 	if (fs_info->extent_root->node)
 		free_extent_buffer(fs_info->extent_root->node);
 

188 lines not on this page · raw message

195 lines not on this page · raw message

71 lines not on this page · raw message

147 lines not on this page · raw message