Re: [PATCH 08/40] mm: kmem_cache_objsize

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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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