Btrfs: join the transaction in __btrfs_setxattr

With selinux on we end up calling __btrfs_setxattr when we create an inode,
which calls btrfs_start_transaction().  The problem is we've already called
that in btrfs_new_inode, and in btrfs_start_transaction we end up doing a
wait_current_trans().  If btrfs-transaction has started committing it will wait
for all handles to finish, while the other process is waiting for the
transaction to commit.  This is fixed by using btrfs_join_transaction, which
won't wait for the transaction to commit.  Thanks,

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

diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 312b943..a9d3bf4 100644 (file)
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -98,7 +98,7 @@ int __btrfs_setxattr(struct inode *inode, const char *name,
        if (!path)
                return -ENOMEM;
 
-       trans = btrfs_start_transaction(root, 1);
+       trans = btrfs_join_transaction(root, 1);
        btrfs_set_trans_block_group(trans, inode);
 
        /* first lets see if we already have this xattr */