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>
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 31b46a9..179fda9 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -2901,6 +2901,7 @@
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 @@
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);
}