Dcache hash distrubition patches

[Martin J. Bligh]

Thanks to Andi for the distribution count patches. I did some quick
numbers with this, just by running "find / | xargs ls -l > /dev/null"
to populate the cache, then dumped the numbers out.

larry:~# grep dentry /proc/slabinfo
dentry_cache      880531 884880    160 36870 36870    1 :  248  124

  count length
 444569 0
 381295 1
 163442 2
  46937 3
  10042 4
   1747 5
    253 6
     30 7
      5 8

Conclusion: the hash distribution (for this simple test) looks fine
to me.

M.