Re: [PATCH] per-page SLAB freeing (only dcache for now)

[Christoph Lameter <clameter@engr.sgi.com>]

On Fri, 30 Sep 2005, Marcelo wrote:

> I don't see any fundamental problems with this approach, are there any?
> I'll clean it up and proceed to write the inode cache equivalent 
> if there aren't.

Hmm. I think this needs to be some generic functionality in the slab 
allocator. If the allocator determines that the number of entries in a 
page become reasonably low then call a special function provided at 
slab creation time to try to free up the leftover entries.

Something like

int slab_try_free(void *);

?

return true/false depending on success of attempt to free the entry.

This method may also be useful to attempt to migrate slab pages to 
different nodes. If such a method is available then one can try to free 
all entries in a page relying on their recreation on another node if they 
are needed again.

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