vfs: shrink_dcache_parent before rmdir, dir rename
Sage Weil [Mon, 30 May 2011 04:20:59 +0000 (21:20 -0700)]
The dentry_unhash push-down series missed that shink_dcache_parent needs to
be called prior to rmdir or dir rename to clear DCACHE_REFERENCED and
allow efficient dentry reclaim.

Reported-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/namei.c

index 1ab641f..e2e4e8d 100644 (file)
@@ -2579,6 +2579,7 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry)
        if (error)
                goto out;
 
+       shrink_dcache_parent(dentry);
        error = dir->i_op->rmdir(dir, dentry);
        if (error)
                goto out;
@@ -2993,6 +2994,8 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
        if (d_mountpoint(old_dentry) || d_mountpoint(new_dentry))
                goto out;
 
+       if (target)
+               shrink_dcache_parent(new_dentry);
        error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry);
        if (error)
                goto out;