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SubjectRe: [PATCH] New dcache / inode hash tuning patch
Date
On March 1, 2003 04:08 am, Andi Kleen wrote:
> > 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.

You would have to lock the chain IF the dentry was not at the head. Would
be interesting to see if this locking would hurt much - since hot
dentries would not require a lock...

Ed

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