Re: [PATCH] vfs: add d_prune dentry operation

[Christoph Hellwig]

On Mon, Oct 10, 2011 at 09:19:43AM -0700, Sage Weil wrote:
> Let me know if the below is clearer.  The requirement is that ->d_prune be 
> called prior to unhashing (and then destroying) a victim dentry.  I'm a 
> little worried about mixing that in with the lru helpers because it is 
> only indirectly related to whether the dentry is on the LRU, and that may 
> confuse people.  A cleaned up opencoded patch is here:
> 
> 	https://github.com/NewDreamNetwork/ceph-client/commit/784a6aa6dc7baf2069c40988d79130dba17c7068
> 
> and the updated dentry_lru_prune() wrapper version is below.

Long term what I really want is a helper for doing more of the real
removal in single place.  This is one step towards it, and the series
from Dave is another.

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