Re: [PATCH] New dcache / inode hash tuning patch

[Andi Kleen]

> I wonder what would happen if you reordered the chains moving a 'found'
> dentry to the front of the chain?  If this could be done without 
> excessive locking it might help keep hot entries quickly accessable.
> This operation should be cheaper given you are using hlists.

You would need to fetch a spinlock for LRU, while the current lookup
runs completely lockless.

-Andi