ext4: Use a hash of the topdir directory name for the Orlov parent group

Instead of using a random number to determine the goal parent grop for
the Orlov top directories, use a hash of the directory name.  This
allows for repeatable results when trying to benchmark filesystem
layout algorithms.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 2 insertions, 3 deletions

diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index fe64d9f79852..80d075b8aeaf 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -483,9 +483,8 @@ int ext4_ext_migrate(struct inode *inode)
                 retval = PTR_ERR(handle);
                 return retval;
         }
-        tmp_inode = ext4_new_inode(handle,
-                                inode->i_sb->s_root->d_inode,
-                                S_IFREG);
+        tmp_inode = ext4_new_inode(handle, inode->i_sb->s_root->d_inode,
+                                   S_IFREG, 0);
         if (IS_ERR(tmp_inode)) {
                 retval = -ENOMEM;
                 ext4_journal_stop(handle);