Btrfs: fix space accounting for unlink and rename

We are way over-reserving for unlink and rename.  Rename is just some random
huge number and unlink accounts for tree log operations that don't actually
happen during unlink, not to mention the tree log doesn't take from the trans
block rsv anyway so it's completely useless.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 6a6e13c53086bef53884181fe0ae5aeda05192b6..8cab424c75f86eeef8bd7d3cc163feeabe51ae67 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3693,11 +3693,9 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir,
         * 1 for the dir item
         * 1 for the dir index
         * 1 for the inode ref
-        * 1 for the inode ref in the tree log
-        * 2 for the dir entries in the log
         * 1 for the inode
         */
-       trans = btrfs_start_transaction(root, 8);
+       trans = btrfs_start_transaction(root, 5);
        if (!IS_ERR(trans) || PTR_ERR(trans) != -ENOSPC)
                return trans;
 
@@ -8141,7 +8139,7 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
         * inodes.  So 5 * 2 is 10, plus 1 for the new link, so 11 total items
         * should cover the worst case number of items we'll modify.
         */
-       trans = btrfs_start_transaction(root, 20);
+       trans = btrfs_start_transaction(root, 11);
        if (IS_ERR(trans)) {
                 ret = PTR_ERR(trans);
                 goto out_notrans;