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authorJosef Bacik <jbacik@fusionio.com>2012-09-28 11:56:28 -0400
committerChris Mason <chris.mason@fusionio.com>2012-10-09 09:15:41 -0400
commit18ec90d63f43cf785f6e73e7a7db546bff3fa380 (patch)
tree1f75eeb616202d30d331149c922525fbd25b84d8 /fs/btrfs
parent6f1fed775316d58ba356b2ce62de600ad00f003a (diff)
Btrfs: be smarter about dropping things from the tree log
When we truncate existing items in the tree log we've been searching for each individual item and removing them. This is unnecessary churn and searching, just keep track of the slot we are on and how many items we need to delete and delete them all at once. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/tree-log.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 31b46a9e94cc..179fda964601 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -2901,6 +2901,7 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans,
int ret;
struct btrfs_key key;
struct btrfs_key found_key;
+ int start_slot;
key.objectid = objectid;
key.type = max_key_type;
@@ -2922,8 +2923,18 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans,
if (found_key.objectid != objectid)
break;
- ret = btrfs_del_item(trans, log, path);
- if (ret)
+ found_key.offset = 0;
+ found_key.type = 0;
+ ret = btrfs_bin_search(path->nodes[0], &found_key, 0,
+ &start_slot);
+
+ ret = btrfs_del_items(trans, log, path, start_slot,
+ path->slots[0] - start_slot + 1);
+ /*
+ * If start slot isn't 0 then we don't need to re-search, we've
+ * found the last guy with the objectid in this tree.
+ */
+ if (ret || start_slot != 0)
break;
btrfs_release_path(path);
}