Re: [RFC] Use compound pages for higher order slab allocations.

[Manfred Spraul]

Christoph Lameter wrote:

> +static inline struct page *virt_to_compound_page(const void *addr)
> +{
> +	struct page * page = virt_to_page(addr);
> +
> +	if (PageCompound(page))
> +        	page = (struct page *)page_private(page);
> +
>  
This would end up in every kmem_cache_free/kfree call. Is it really 
worth the effort, are the high order allocation a problem?
I'm against such a change without a clear proof that just using high 
order allocations is not possible.

--
   Manfred
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