Btrfs: Add a write ahead tree log to optimize synchronous operations
File syncs and directory syncs are optimized by copying their
items into a special (copy-on-write) log tree. There is one log tree per
subvolume and the btrfs super block points to a tree of log tree roots.
After a crash, items are copied out of the log tree and back into the
subvolume. See tree-log.c for all the details.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c
index cc2650b..b3bb5bb 100644
--- a/fs/btrfs/tree-defrag.c
+++ b/fs/btrfs/tree-defrag.c
@@ -81,12 +81,12 @@
memcpy(&key, &root->defrag_progress, sizeof(key));
}
- path->lowest_level = 1;
path->keep_locks = 1;
if (cache_only)
min_trans = root->defrag_trans_start;
- ret = btrfs_search_forward(root, &key, path, cache_only, min_trans);
+ ret = btrfs_search_forward(root, &key, NULL, path,
+ cache_only, min_trans);
if (ret < 0)
goto out;
if (ret > 0) {