Re: [PATCH 08/40] mm: kmem_cache_objsize

[Pekka Enberg]

Christoph Lameter wrote:
> Hmmm... Maybe lets have
>
> unsigned kmem_estimate_pages(struct kmem_cache *slab_cache, int objects)
>
> which would calculate the worst case memory scenario for allocation the 
> number of indicated objects?

IIRC this looks more or less what Peter had initially. I don't like the 
API because there's no way for slab (perhaps this is different for slub) 
how many pages you really need due to per-node and per-cpu caches, etc.

It's better that the slab tells you what it actually knows and lets the 
callers figure out what a worst-case upper bound is.

				Pekka


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