Re: VM balancing issues on 2.6.13: dentry cache not getting shrunkenough

[Helge Hafting]

Martin J. Bligh wrote:

> If they're freeable, we should easily be able to move them, and therefore 
> compact a fragmented slab. That way we can preserve the LRU'ness of it.
> Stage 1: free the oldest entries. Stage 2: compact the slab into whole
> pages. Stage 3: free whole pages back to teh page allocator.
>  
That seems like the perfect solution to me.  Freeing up 95% or more
gives us clean pages - and moving instead of actually freeing
everything avoids the cost of repopulating the cache later. :-)

Helge Hafting
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