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authorChris Mason <chris.mason@oracle.com>2008-09-05 16:13:11 -0400
committerChris Mason <chris.mason@oracle.com>2008-09-25 11:04:07 -0400
commite02119d5a7b4396c5a872582fddc8bd6d305a70a (patch)
tree825efe2a79dbca8d61256183f3526a5b5dc40dc6 /fs/btrfs/root-tree.c
parenta1b32a5932cfac7c38b442582285f3da2a09dfd8 (diff)
downloadop-kernel-dev-e02119d5a7b4396c5a872582fddc8bd6d305a70a.zip
op-kernel-dev-e02119d5a7b4396c5a872582fddc8bd6d305a70a.tar.gz
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>
Diffstat (limited to 'fs/btrfs/root-tree.c')
-rw-r--r--fs/btrfs/root-tree.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c
index 3672669..e3984f9 100644
--- a/fs/btrfs/root-tree.c
+++ b/fs/btrfs/root-tree.c
@@ -202,8 +202,9 @@ again:
memcpy(&found_key, &key, sizeof(key));
key.offset++;
btrfs_release_path(root, path);
- dead_root = btrfs_read_fs_root_no_radix(root->fs_info,
- &found_key);
+ dead_root =
+ btrfs_read_fs_root_no_radix(root->fs_info->tree_root,
+ &found_key);
if (IS_ERR(dead_root)) {
ret = PTR_ERR(dead_root);
goto err;
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