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

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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>
This commit is contained in:
Theodore Ts'o
2009-06-13 11:09:42 -04:00
parent 8a8a2050c8
commit f157a4aa98
4 changed files with 22 additions and 13 deletions
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8
fs/ext4/namei.c
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@ -1782,7 +1782,7 @@ retry:
if (IS_DIRSYNC(dir))
ext4_handle_sync(handle);
inode = ext4_new_inode (handle, dir, mode);
inode = ext4_new_inode(handle, dir, mode, &dentry->d_name);
err = PTR_ERR(inode);
if (!IS_ERR(inode)) {
inode->i_op = &ext4_file_inode_operations;
@ -1816,7 +1816,7 @@ retry:
if (IS_DIRSYNC(dir))
ext4_handle_sync(handle);
inode = ext4_new_inode(handle, dir, mode);
inode = ext4_new_inode(handle, dir, mode, &dentry->d_name);
err = PTR_ERR(inode);
if (!IS_ERR(inode)) {
init_special_inode(inode, inode->i_mode, rdev);
@ -1853,7 +1853,7 @@ retry:
if (IS_DIRSYNC(dir))
ext4_handle_sync(handle);
inode = ext4_new_inode(handle, dir, S_IFDIR | mode);
inode = ext4_new_inode(handle, dir, S_IFDIR | mode, &dentry->d_name);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out_stop;
@ -2264,7 +2264,7 @@ retry:
if (IS_DIRSYNC(dir))
ext4_handle_sync(handle);
inode = ext4_new_inode(handle, dir, S_IFLNK|S_IRWXUGO);
inode = ext4_new_inode(handle, dir, S_IFLNK|S_IRWXUGO, &dentry->d_name);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out_stop;