XFS unlink still slow on 3.1.9 kernel ?

[Christoph Hellwig]

On Mon, Feb 13, 2012 at 05:57:58PM +0100, Richard Ems wrote:
> This is a backup system running dirvish, so most files in the dirs I am
> removing are hard links. Almost all of the files do have ACLs set.

How many ACLs do you usually have set?  If they aren't stored inline
but need to go out of the inode unlinks will be extremly slow for
kernels before v3.2.